├── HTMLPAGE.h ├── LICENSE ├── PCEmulatorPlus.ino ├── README.md ├── bios.cpp ├── bios.h ├── biosrom.h ├── machine.cpp ├── machine.h ├── mconf.cpp └── mconf.h /HTMLPAGE.h: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | NOTE: don't edit manually, this is generated by build.sh 4 | 5 | */ 6 | 7 | const char* HTMLPAGE="

ChatterBox

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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # PCEmulatorPlus 2 | The PCEmulator by Fabrizio Di Vittorio plus applications for a more complete system. For the TTGO VGA32 1.4 board and compatibles. 3 | 4 | - What is this for? 5 | 6 | This code allows you to use a microcontroller-based board (Esp32) as if it were a computer. This is accomplished by combining a 16-bit PC emulator (8086-CGA/Hercules) with more modern applications (MP3 player, JPG image viewer, microSD card file manager, etc.). 7 | 8 | - What are the advantages? 9 | 10 | This allows you to have a low-power, cheap, offgrid, and highly modular computer. Suitable for extreme contexts (lack of electricity, market crisis, etc.) 11 | 12 | - What are the disadvantages? 13 | 14 | The computer built using this code has a much lower processing capacity than what is normally seen. You won't be able to watch videos (properly), surf the Internet or play photorealistic action games. 15 | 16 | Apps: 17 | 18 | **With Display:** 19 | - PCEmulator (IBM PC/XT emulator with CGA and Hercules graphics); 20 | - ChatterBox (Horizontal chat server); 21 | - File Browser; 22 | - Jpg View (see images from SD card) (only 400x300, 64 colors max.); 23 | - Web Radios (Online Radios from many countrys); 24 | - Audio Player (play .mp3, .wav, etc. from SD); 25 | - Wi-fi Safe (test security of wifi); 26 | - Commodore VIC-20 emulator (Only PAL, only crt and prg files). 27 | 28 | **With Audio:** 29 | 1) Web Radios 30 | 2) Chat Server 31 | 3) Audio Maker 32 | 4) Timer 33 | 5) Audio Player (play .mp3, .wav, etc. from SD); 34 | 35 | See the wiki for limitations and how to use this system. 36 | 37 | The system is being designed to work even if part of the hardware is unavailable, thus avoiding the production of electronic waste in the event of a component failure. 38 | What works without... 39 | - microSD card: ChatterBox, Web Radios, Wi-fi Safe, Audio Maker, VIC-20 emulator 40 | - Sound output: Wi-fi Safe, File Browser, Jpg View, PCEmulator, VIC-20 emulator (some apps) 41 | - Wi-Fi: Audio Player, File Browser, Jpg View, PCEmulator, Audio Maker, VIC-20 emulator 42 | - Mouse: PCEmulator, File Browser, Jpg View, Audio Player, Timer, Audio Maker, VIC-20 emulator 43 | - Keyboard: File Browser, ChatterBox, Wi-fi Safe, VIC-20 emulator (some apps) 44 | - PSRAM: ChatterBox, Wi-fi Safe, File Browser, Timer, 45 | - VGA output: ChatterBox, Web Radios, Audio Maker, Audio Player, Timer, 46 | 47 | If you don't use the video output you will need to use a keyboard and the audio output. 48 | Theoretically, some applications can even be used by a blind person if an accessible keyboard is connected. 49 | 50 | Disks for the PCEmulator: 51 | https://drive.google.com/drive/folders/1OFRNx3wDCHZ4ajmrT9v_o90OhCe7HoOJ?usp=share_link 52 | 53 | Used libs: 54 | - FabGL by Fabrizio Di Vittorio version 1.0.9 https://github.com/fdivitto/FabGL/releases/tag/v1.0.9 55 | - TJpg_Decoder by Bodmer version 0.0.2 https://github.com/Bodmer/TJpg_Decoder/releases/tag/0.0.2 56 | - ESP32-audioI2S por Wolle version 3.0.0 https://github.com/schreibfaul1/ESP32-audioI2S/releases/tag/3.0.0 57 | And 58 | - Board arduino-esp32 by espressif version 1.0.6 https://github.com/espressif/arduino-esp32/releases/tag/1.0.6 59 | - Arduino IDE version 1.8.13 https://github.com/arduino/Arduino/releases/tag/1.8.13 60 | -------------------------------------------------------------------------------- /bios.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - 3 | Copyright (c) 2019-2022 Fabrizio Di Vittorio. 4 | All rights reserved. 5 | 6 | 7 | * Please contact fdivitto2013@gmail.com if you need a commercial license. 8 | 9 | 10 | * This library and related software is available under GPL v3. 11 | 12 | FabGL is free software: you can redistribute it and/or modify 13 | it under the terms of the GNU General Public License as published by 14 | the Free Software Foundation, either version 3 of the License, or 15 | (at your option) any later version. 16 | 17 | FabGL is distributed in the hope that it will be useful, 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 | GNU General Public License for more details. 21 | 22 | You should have received a copy of the GNU General Public License 23 | along with FabGL. If not, see . 24 | */ 25 | 26 | 27 | 28 | #include "bios.h" 29 | #include "machine.h" 30 | #include "emudevs/i8086.h" 31 | 32 | 33 | using fabgl::i8086; 34 | 35 | 36 | // To compile BIOS execute "cbios.sh" 37 | static const uint8_t biosrom[] = { 38 | #include "biosrom.h" 39 | }; 40 | 41 | 42 | BIOS::BIOS() 43 | : m_memory(nullptr) 44 | { 45 | } 46 | 47 | 48 | void BIOS::init(Machine * machine) 49 | { 50 | m_machine = machine; 51 | m_memory = m_machine->memory(); 52 | m_i8042 = m_machine->getI8042(); 53 | m_keyboard = m_i8042->keyboard(); 54 | m_mouse = m_i8042->mouse(); 55 | m_MC146818 = m_machine->getMC146818(); 56 | 57 | // copy bios 58 | memcpy(m_memory + BIOS_ADDR, biosrom, sizeof(biosrom)); 59 | 60 | // setup bootstrap code (starting from 0xFFFF0) 61 | // for example: "JMP FC00:0100" 62 | m_memory[0xffff0] = 0xea; 63 | m_memory[0xffff1] = BIOS_OFF & 0xff; 64 | m_memory[0xffff2] = BIOS_OFF >> 8; 65 | m_memory[0xffff3] = BIOS_SEG & 0xff; 66 | m_memory[0xffff4] = BIOS_SEG >> 8; 67 | } 68 | 69 | 70 | void BIOS::reset() 71 | { 72 | m_kbdScancodeComp = 0; 73 | m_memory[BIOS_DATAAREA_ADDR + BIOS_NUMHD] = (bool)(m_machine->disk(2)) + (bool)(m_machine->disk(3)); 74 | } 75 | 76 | 77 | // drive: 78 | // 0 = floppy 0 (get address from INT 1E) 79 | // 1 = floppy 1 (get address from INT 1E) 80 | // 2 = HD 0 (get address from INT 41) 81 | // 3 = HD 1 (get address from INT 46) 82 | uint32_t BIOS::getDriveMediaTableAddr(int drive) 83 | { 84 | int intNum = drive < 2 ? 0x1e : (drive == 2 ? 0x41 : 0x46); 85 | uint16_t * intAddr = (uint16_t*)(m_memory + intNum * 4); 86 | return intAddr[0] + intAddr[1] * 16; 87 | } 88 | 89 | 90 | bool BIOS::checkDriveMediaType(int drive) 91 | { 92 | if (drive < 2) { 93 | // FDD 94 | if (m_mediaType[drive] == mediaUnknown) { 95 | MediaType mt = mediaUnknown; 96 | int h = m_machine->diskHeads(drive); 97 | int t = m_machine->diskCylinders(drive); 98 | int s = m_machine->diskSectors(drive); 99 | if (h == 1 && t == 40 && s == 8) 100 | mt = floppy160KB; 101 | else if (h == 1 && t == 40 && s == 9) 102 | mt = floppy180KB; 103 | else if (h == 2 && t == 40 && s == 8) 104 | mt = floppy320KB; 105 | else if (h == 2 && t == 40 && s == 9) 106 | mt = floppy360KB; 107 | else if (h == 2 && t == 80 && s == 9) 108 | mt = floppy720KB; 109 | else if (h == 2 && t == 80 && s == 15) 110 | mt = floppy1M2K; 111 | else if (h == 2 && t == 80 && s == 18) 112 | mt = floppy1M44K; 113 | else if (h == 2 && t == 80 && s == 36) 114 | mt = floppy2M88K; 115 | setDriveMediaType(drive, mt); 116 | } 117 | } else { 118 | // HDD 119 | if (m_machine->disk(drive)) 120 | setDriveMediaType(drive, HDD); 121 | } 122 | return m_mediaType[drive] != mediaUnknown; 123 | } 124 | 125 | 126 | void BIOS::setDriveMediaType(int drive, MediaType media) 127 | { 128 | m_mediaType[drive] = media; 129 | 130 | if (drive < 2) { 131 | // FDD 132 | 133 | // updates BIOS data area 134 | uint8_t knownMedia = 0x10; // default set bit 4 (known media) 135 | uint8_t doubleStepping = 0x00; // reset bit 5 (double stepping) 136 | uint8_t dataRate = 0x00; 137 | uint8_t defs = 0x00; 138 | switch (media) { 139 | case floppy160KB: 140 | case floppy180KB: 141 | case floppy320KB: 142 | case floppy360KB: 143 | doubleStepping = 0x20; // set bit 5 (double stepping) 144 | dataRate = 0b01000000; // 300 KBS 145 | defs = 0b00000100; // Known 360K media in 1.2MB drive 146 | break; 147 | case floppy720KB: 148 | dataRate = 0b10000000; // 250 KBS 149 | defs = 0b00000111; // 720K media in 720K drive or 1.44MB media in 1.44MB drive 150 | break; 151 | case floppy1M2K: 152 | dataRate = 0b00000000; // 500 KBS 153 | defs = 0b00000101; // Known 1.2MB media in 1.2MB drive 154 | break; 155 | case floppy1M44K: 156 | dataRate = 0b00000000; // 500 KBS 157 | defs = 0b00000111; // 720K media in 720K drive or 1.44MB media in 1.44MB drive 158 | break; 159 | case floppy2M88K: 160 | dataRate = 0b11000000; // 1 MBS 161 | defs = 0b00000111; // right? 162 | break; 163 | case mediaUnknown: 164 | default: 165 | knownMedia = 0x00; // reset bit 4 (known media) 166 | break; 167 | } 168 | if (m_memory && drive < 2) { 169 | // BIOS data area 170 | m_memory[BIOS_DATAAREA_ADDR + BIOS_DRIVE0MEDIATYPE + drive] = knownMedia | doubleStepping | dataRate | defs; 171 | //printf("%05X = %02X\n", BIOS_DATAAREA_ADDR + BIOS_DRIVE0MEDIATYPE + drive, m_memory[BIOS_DATAAREA_ADDR + BIOS_DRIVE0MEDIATYPE + drive]); 172 | 173 | // INT 1E 174 | uint32_t maddr = getDriveMediaTableAddr(drive); 175 | m_memory[maddr + 0x04] = m_machine->diskSectors(drive); 176 | 177 | // original INT 1E (returned in ES:DI, int 13h, serv 08h) 178 | m_memory[m_origInt1EAddr + 0x04] = m_machine->diskSectors(drive); 179 | m_memory[m_origInt1EAddr + 0x0b] = m_machine->diskCylinders(drive) - 1; 180 | } 181 | 182 | } else if (media == HDD) { 183 | 184 | // HDD 185 | 186 | // fill tables pointed by INT 41h or 46h 187 | uint32_t mtableAddr = getDriveMediaTableAddr(drive); 188 | *(uint16_t*)(m_memory + mtableAddr + 0x00) = m_machine->diskCylinders(drive); 189 | *(uint8_t*)(m_memory + mtableAddr + 0x02) = m_machine->diskHeads(drive); 190 | *(uint8_t*)(m_memory + mtableAddr + 0x0e) = m_machine->diskSectors(drive); 191 | 192 | } 193 | } 194 | 195 | 196 | // AH = select the helper function 197 | void BIOS::helpersEntry() 198 | { 199 | switch (i8086::AH()) { 200 | 201 | // AH = 0x00, perform some INT 9 tasks (keyboard interrupt handler) 202 | case 0x00: 203 | getKeyFromKeyboard(); 204 | break; 205 | 206 | // AH = 0x01, get or extract key from keyboard buffer 207 | case 0x01: 208 | getKeyFromBuffer(); 209 | break; 210 | 211 | // AH = 0x02, get shift flags or extended shift flags 212 | case 0x02: 213 | getKeyboardFlags(); 214 | break; 215 | 216 | // AH = 0x03, set keyboard typematic rate and delay 217 | case 0x03: 218 | setKeyboardTypematicAndDelay(); 219 | break; 220 | 221 | // AH = 0x05, store keyboard key data 222 | case 0x05: 223 | storeKeyboardKeyData(); 224 | break; 225 | 226 | // AH = 0x06, pointing device interface 227 | case 0x06: 228 | pointingDeviceInterface(); 229 | break; 230 | 231 | // AH = 0x07, synchronize system ticks with RTC 232 | case 0x07: 233 | syncTicksWithRTC(); 234 | break; 235 | 236 | // AH = 0x08, set media drive parameters tables address 237 | // ES:BX = int 1Eh address (in bios.asm) for floppy drivers 238 | case 0x08: 239 | m_origInt1EAddr = i8086::ES() * 16 + i8086::BX(); 240 | // set initial media 241 | for (int i = 0; i < DISKCOUNT; ++i) 242 | setDriveMediaType(i, mediaUnknown); 243 | break; 244 | 245 | default: 246 | break; 247 | 248 | }; 249 | } 250 | 251 | 252 | 253 | // convert keypad scancode to number, or -1 if not applicable 254 | int convKeypadScancodeToNum(uint8_t scancode) 255 | { 256 | // LUT to convert scancode 0x47 to 0x52 257 | static const int8_t CONV[12] = { 7, 8, 9, -1, 4, 5, 6, -1, 1, 2, 3, 0 }; 258 | return scancode >= 0x47 && scancode <= 0x52 ? CONV[scancode - 0x47] : -1; 259 | } 260 | 261 | 262 | // - update keyboard shift flags 263 | // - adapt fabgl scancode to PC scancodes 264 | // ret: true if the key need to be inserted into the keyboard buffer 265 | bool BIOS::processScancode(int scancode, uint16_t * syscode) 266 | { 267 | struct ScanCode2SysCode { 268 | uint8_t scancode; 269 | uint16_t syscode[4]; // 0 = normal, 1 = shifted, 2 = control, 3 = alt 270 | }; 271 | static const ScanCode2SysCode SCODE2SYSCODE[] = { 272 | { 0x29, 0x2960, 0x297e, 0xffff, 0x2900 }, { 0x02, 0x0231, 0x0221, 0xffff, 0x7800 }, { 0x03, 0x0332, 0x0340, 0x0300, 0x7900 }, 273 | { 0x04, 0x0433, 0x0423, 0xffff, 0x7a00 }, { 0x05, 0x0534, 0x0524, 0xffff, 0x7b00 }, { 0x06, 0x0635, 0x0625, 0xffff, 0x7c00 }, 274 | { 0x07, 0x0736, 0x075e, 0x071e, 0x7d00 }, { 0x08, 0x0837, 0x0826, 0xffff, 0x7e00 }, { 0x09, 0x0938, 0x092a, 0xffff, 0x7f00 }, 275 | { 0x0a, 0x0a39, 0x0a28, 0xffff, 0x8000 }, { 0x0b, 0x0b30, 0x0b29, 0xffff, 0x8100 }, { 0x0c, 0x0c2d, 0x0c5f, 0x0c1f, 0x8200 }, 276 | { 0x0d, 0x0d3d, 0x0d2b, 0xffff, 0x8300 }, { 0x0e, 0x0e08, 0x0e08, 0x0e7f, 0x0e00 }, { 0x0f, 0x0f09, 0x0f00, 0x9400, 0xa500 }, 277 | { 0x10, 0x1071, 0x1051, 0x1011, 0x1000 }, { 0x11, 0x1177, 0x1157, 0x1117, 0x1100 }, { 0x12, 0x1265, 0x1245, 0x1205, 0x1200 }, 278 | { 0x13, 0x1372, 0x1352, 0x1312, 0x1300 }, { 0x14, 0x1474, 0x1454, 0x1414, 0x1400 }, { 0x15, 0x1579, 0x1559, 0x1519, 0x1500 }, 279 | { 0x16, 0x1675, 0x1655, 0x1615, 0x1600 }, { 0x17, 0x1769, 0x1749, 0x1709, 0x1700 }, { 0x18, 0x186f, 0x184f, 0x180f, 0x1800 }, 280 | { 0x19, 0x1970, 0x1950, 0x1910, 0x1900 }, { 0x1a, 0x1a5b, 0x1a7b, 0x1a1b, 0x1a00 }, { 0x1b, 0x1b5d, 0x1b7d, 0x1b1d, 0x1b00 }, 281 | { 0x2b, 0x2b5c, 0x2b7c, 0x2b1c, 0x2b00 }, { 0x1e, 0x1e61, 0x1e41, 0x1e01, 0x1e00 }, { 0x1f, 0x1f73, 0x1f53, 0x1f13, 0x1f00 }, 282 | { 0x20, 0x2064, 0x2044, 0x2004, 0x2000 }, { 0x21, 0x2166, 0x2146, 0x2106, 0x2100 }, { 0x22, 0x2267, 0x2247, 0x2207, 0x2200 }, 283 | { 0x23, 0x2368, 0x2348, 0x2308, 0x2300 }, { 0x24, 0x246a, 0x244a, 0x240a, 0x2400 }, { 0x25, 0x256b, 0x254b, 0x250b, 0x2500 }, 284 | { 0x26, 0x266c, 0x264c, 0x260c, 0x2600 }, { 0x27, 0x273b, 0x273a, 0xffff, 0x2700 }, { 0x28, 0x2827, 0x2822, 0xffff, 0x2800 }, 285 | { 0x2b, 0x2b5c, 0x2b7c, 0x2b1c, 0xffff }, { 0x1c, 0x1c0d, 0x1c0d, 0x1c0a, 0x1c00 }, { 0x56, 0x565c, 0x567c, 0xffff, 0xffff }, 286 | { 0x2c, 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00 }, { 0x2d, 0x2d78, 0x2d58, 0x2d18, 0x2d00 }, { 0x2e, 0x2e63, 0x2e43, 0x2e03, 0x2e00 }, 287 | { 0x2f, 0x2f76, 0x2f56, 0x2f16, 0x2f00 }, { 0x30, 0x3062, 0x3042, 0x3002, 0x3000 }, { 0x31, 0x316e, 0x314e, 0x310e, 0x3100 }, 288 | { 0x32, 0x326d, 0x324d, 0x320d, 0x3200 }, { 0x33, 0x332c, 0x333c, 0xffff, 0x3300 }, { 0x34, 0x342e, 0x343e, 0xffff, 0x3400 }, 289 | { 0x35, 0x352f, 0x353f, 0xffff, 0x3500 }, { 0x39, 0x3920, 0x3920, 0x3920, 0x3920 }, { 0x47, 0x4700, 0x4737, 0x7700, 0xffff }, 290 | { 0x4b, 0x4b00, 0x4b34, 0x7300, 0xffff }, { 0x4f, 0x4f00, 0x4f31, 0x7500, 0xffff }, { 0x48, 0x4800, 0x4838, 0x8d00, 0xffff }, 291 | { 0x4c, 0x4c00, 0x4c35, 0x8f00, 0xffff }, { 0x50, 0x5000, 0x5032, 0x9100, 0xffff }, { 0x52, 0x5200, 0x5230, 0x9200, 0xffff }, 292 | { 0x37, 0x372a, 0x372a, 0x9600, 0x3700 }, { 0x49, 0x4900, 0x4939, 0x8400, 0xffff }, { 0x4d, 0x4d00, 0x4d36, 0x7400, 0xffff }, 293 | { 0x51, 0x5100, 0x5133, 0x7600, 0xffff }, { 0x53, 0x5300, 0x532e, 0x9300, 0xffff }, { 0x4a, 0x4a2d, 0x4a2d, 0x8e00, 0x4a00 }, 294 | { 0x4e, 0x4e2b, 0x4e2b, 0x9000, 0x4e00 }, { 0x01, 0x011b, 0x011b, 0x011b, 0x0100 }, { 0x3b, 0x3b00, 0x5400, 0x5e00, 0x6800 }, 295 | { 0x3c, 0x3c00, 0x5500, 0x5f00, 0x6900 }, { 0x3d, 0x3d00, 0x5600, 0x6000, 0x6a00 }, { 0x3e, 0x3e00, 0x5700, 0x6100, 0x6b00 }, 296 | { 0x3f, 0x3f00, 0x5800, 0x6200, 0x6c00 }, { 0x40, 0x4000, 0x5900, 0x6300, 0x6d00 }, { 0x41, 0x4100, 0x5a00, 0x6400, 0x6e00 }, 297 | { 0x42, 0x4200, 0x5b00, 0x6500, 0x6f00 }, { 0x43, 0x4300, 0x5c00, 0x6600, 0x7000 }, { 0x44, 0x4400, 0x5d00, 0x6700, 0x7100 }, 298 | { 0x57, 0x8500, 0x8700, 0x8900, 0x8b00 }, { 0x58, 0x8600, 0x8800, 0x8a00, 0x8c00 }, 299 | { 0x00, 0xffff, 0xffff, 0xffff, 0xffff } // ending code 300 | }; 301 | static const ScanCode2SysCode ESCODE2SYSCODE[] = { 302 | { 0x52, 0x52e0, 0x52e0, 0x92e0, 0xa200 }, { 0x53, 0x53e0, 0x53e0, 0x93e0, 0xa300 }, { 0x4b, 0x4be0, 0x4be0, 0x73e0, 0x9b00 }, 303 | { 0x47, 0x47e0, 0x47e0, 0x77e0, 0x9700 }, { 0x4f, 0x4fe0, 0x4fe0, 0x75e0, 0x9f00 }, { 0x48, 0x48e0, 0x48e0, 0x8de0, 0x9800 }, 304 | { 0x50, 0x50e0, 0x50e0, 0x91e0, 0xa000 }, { 0x49, 0x49e0, 0x49e0, 0x84e0, 0x9900 }, { 0x51, 0x51e0, 0x51e0, 0x76e0, 0xa100 }, 305 | { 0x4d, 0x4de0, 0x4de0, 0x74e0, 0x9d00 }, { 0x35, 0xe02f, 0xe02f, 0x9500, 0xa400 }, { 0x1c, 0xe00d, 0xe00d, 0xe00a, 0xa600 }, 306 | { 0x37, 0xffff, 0xffff, 0x7200, 0xffff }, // CTRL + PRINTSCREEN 307 | { 0x46, 0xffff, 0xffff, 0x0000, 0xffff }, // CTRL + PAUSE (BREAK) 308 | { 0x00, 0xffff, 0xffff, 0xffff, 0xffff } // ending code 309 | }; 310 | 311 | //printf(" %02X\n", scancode); 312 | 313 | *syscode = 0xffff; 314 | 315 | // 3 = RALT, 2 = RCTRL, 1 = E0, 0 = E1 316 | uint8_t * mode = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDMODE; 317 | 318 | // save and reset e0 and e1 flags 319 | bool e0 = *mode & 0x02; 320 | bool e1 = *mode & 0x01; 321 | *mode &= 0xfc; 322 | 323 | // e0? 324 | if (scancode == 0xe0) { 325 | *mode |= 0x02; 326 | return false; 327 | } 328 | 329 | // e1? 330 | if (scancode == 0xe1) { 331 | *mode |= 0x01; 332 | return false; 333 | } 334 | 335 | bool down = !(scancode & 0x80); // down if bit 7 = 0 336 | scancode &= 0x7f; 337 | 338 | //printf(" e0 = %d, down = %d\n", e0, down); 339 | 340 | // 7 = INS ON, 6 = CAPS ON, 5 = NUMLCK ON, 4 = SCRLCK ON, 3 = ALT, 2 = CTRL, 1 = LSHIFT, 0 = RSHIFT 341 | uint8_t * flags1 = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDSHIFTFLAGS1; 342 | 343 | // 7 = INS, 6 = CAPS, 5 = NUMLCK, 4 = SCRLCK, 3 = CTRL+NUMLCK ON (PAUSE), 2 = SYSREQ, 1 = LALT, 0 = LCTRL 344 | uint8_t * flags2 = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDSHIFTFLAGS2; 345 | 346 | // 2 = CAPS LED, 1 = NUMLCK LED, 0 = SCRLCK LED 347 | uint8_t * LEDs = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDLEDS; 348 | 349 | uint8_t * altKeypadEntry = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDALTKEYPADENTRY; 350 | 351 | if (e0) { 352 | // extended code (0xe0 ...) 353 | switch (scancode) { 354 | // RCTRL 355 | case 0x1d: 356 | *flags1 = (*flags1 & ~0x04) | (0x04 * down); // bit 2 on flags1 (1 = down) 357 | *mode = (*mode & ~0x04) | (0x04 * down); // bit 2 on mode (1 = down) 358 | break; 359 | // RALT 360 | case 0x38: 361 | *flags1 = (*flags1 & ~0x08) | (0x08 * down); // bit 3 on flags1 (1 = down) 362 | *mode = (*mode & ~0x08) | (0x08 * down); // bit 3 on mode (1 = down) 363 | break; 364 | // INSERT 365 | case 0x52: 366 | *flags1 ^= 0x80 * !down; // bit 7 on flags1 (toggle when up) 367 | *flags2 = (*flags2 & ~0x80) | (0x80 * down); // bit 7 on flags2 (1 = down) 368 | break; 369 | // PRINTSCREEN or SYSREQ 370 | case 0x37: 371 | // not shifts, PRINTSCREEN 372 | if (down && (*flags1 & 0x0f) == 0) 373 | m_memory[BIOS_DATAAREA_ADDR + BIOS_PRINTSCREENFLAG] = 1; 374 | // ALT + PRINTSCREEN = SYSREQ 375 | else if (*flags1 & 0x08) 376 | *flags2 |= 0x04; 377 | break; 378 | // CTRL + BREAK (CTRL + PAUSE) 379 | case 0x46: 380 | emptyKbdBuffer(); 381 | m_memory[BIOS_DATAAREA_ADDR + BIOS_CTRLBREAKFLAG] = 0x80; 382 | break; 383 | // bypass (e0 2a / e0 aa) 384 | case 0x2a: 385 | return false; 386 | } 387 | } else if (e1 || m_kbdScancodeComp > 0) { 388 | // extended code (0xe1 ...) 389 | if ((m_kbdScancodeComp == 0 && scancode == 0x1d) || (m_kbdScancodeComp == 1 && scancode == 0x45) || (m_kbdScancodeComp == 2 && scancode == 0x1d)) { 390 | ++m_kbdScancodeComp; 391 | return false; 392 | } else if (m_kbdScancodeComp == 3 && scancode == 0x45) { 393 | // PAUSE key completed (e1 1d 45 e1 9d c5) 394 | *flags2 |= 0x08; // bit 3 on flags2 (always set) 395 | m_kbdScancodeComp = 0; 396 | return false; 397 | } 398 | m_kbdScancodeComp = 0; 399 | } else { 400 | // normal code 401 | m_kbdScancodeComp = 0; 402 | switch (scancode) { 403 | // LALT 404 | case 0x38: 405 | *flags1 = (*flags1 & ~0x08) | (0x08 * down); // bit 3 on flags1 (1 = down) 406 | *flags2 = (*flags2 & ~0x02) | (0x02 * down); // bit 1 on flags2 (1 = down) 407 | break; 408 | // LSHIFT 409 | case 0x2a: 410 | *flags1 = (*flags1 & ~0x02) | (0x02 * down); // bit 1 on flags1 (1 = down) 411 | break; 412 | // RSHIFT 413 | case 0x36: 414 | *flags1 = (*flags1 & ~0x01) | (0x01 * down); // bit 0 on flags1 (1 = down) 415 | break; 416 | // LCTRL 417 | case 0x1d: 418 | *flags1 = (*flags1 & ~0x04) | (0x04 * down); // bit 2 on flags1 (1 = down) 419 | *flags2 = (*flags2 & ~0x01) | (0x01 * down); // bit 0 on flags2 (1 = down) 420 | break; 421 | // SCROLLLOCK 422 | case 0x46: 423 | *flags1 ^= 0x10 * !down; // bit 4 on flags1 (toggle when up) 424 | *flags2 = (*flags2 & ~0x10) | (0x10 * down); // bit 4 on flags2 (1 = down) 425 | *LEDs ^= 0x01 * !down; // bit 0 on LEDs (toggle when up) 426 | break; 427 | // NUMLOCK 428 | case 0x45: 429 | *flags1 ^= 0x20 * !down; // bit 5 on flags1 (toggle when up) 430 | *flags2 = (*flags2 & ~0x20) | (0x20 * down); // bit 5 on flags2 (1 = down) 431 | *LEDs ^= 0x02 * !down; // bit 1 on LEDs (toggle when up) 432 | break; 433 | // CAPSLOCK 434 | case 0x3a: 435 | *flags1 ^= 0x40 * !down; // bit 6 on flags1 (toggle when up) 436 | *flags2 = (*flags2 & ~0x40) | (0x40 * down); // bit 6 on flags2 (1 = down) 437 | *LEDs ^= 0x04 * !down; // bit 2 on LEDs (toggle when up) 438 | break; 439 | // KEYPAD INS (KEYPAD 0) 440 | case 0x52: 441 | // NUMLOCK = off ?, interpret keypad0 as INSERT toggle 442 | if ((*flags1 & 0x20) == 0) 443 | *flags1 ^= 0x80 * !down; // bit 7 on flags1 (toggle when up) 444 | break; 445 | } 446 | } 447 | 448 | bool lalt = *flags1 & 0x08; 449 | 450 | // manage LALT + KEYPAD NUM 451 | if (lalt && scancode != 0x38 && !e0) { 452 | // ALT was down, is this a keypad number? 453 | int num = convKeypadScancodeToNum(scancode); 454 | if (num >= 0) { 455 | // yes this is a keypad num, if down update altKeypadEntry 456 | if (down) 457 | *altKeypadEntry = (*altKeypadEntry * 10 + num) & 0xff; 458 | return false; 459 | } else { 460 | // no, back to normal case 461 | *altKeypadEntry = 0; 462 | } 463 | } else if (*altKeypadEntry > 0 && scancode == 0x38 && !down) { 464 | // ALT is up and altKeypadEntry contains a valid value, add it 465 | *syscode = *altKeypadEntry; // high byte will be 0x00, low byte is the ascii value just typed 466 | *altKeypadEntry = 0; 467 | return true; 468 | } 469 | 470 | if (down) { 471 | bool shift = *flags1 & 0x03; 472 | bool capslock = *flags1 & 0x40; 473 | bool numlock = *flags1 & 0x20; 474 | bool ctrl = *flags1 & 0x04; 475 | 476 | // CAPSLOCK enabled and letter 477 | if (capslock && ((scancode >= 0x10 && scancode <= 0x19) || (scancode >= 0x1e && scancode <= 0x26) || (scancode >= 0x2c && scancode <= 0x32))) 478 | shift = !shift; 479 | 480 | // NUMLOCK and keypad 481 | if (numlock && (scancode >= 0x47 && scancode <= 0x53)) 482 | shift = !shift; 483 | 484 | // convert scancode to system code 485 | for (auto CONV = (e0 ? ESCODE2SYSCODE : SCODE2SYSCODE); CONV->scancode; ++CONV) 486 | if (CONV->scancode == scancode) { 487 | *syscode = CONV->syscode[shift ? 1 : ctrl ? 2 : lalt ? 3 : 0]; 488 | return *syscode != 0xffff; 489 | } 490 | } 491 | 492 | return false; 493 | } 494 | 495 | 496 | // ret false on buffer full 497 | bool BIOS::storeKeyInKbdBuffer(uint16_t syscode) 498 | { 499 | // check space in BIOS keyboard buffer 500 | auto head = (uint16_t*)(m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDBUFHEAD); 501 | auto tail = (uint16_t*)(m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDBUFTAIL); 502 | if (*head - 2 != *tail && (*head != BIOS_KBDBUF || *tail != BIOS_KBDBUF + 30)) { 503 | // insert key into the keyboard buffer 504 | *(uint16_t*)(m_memory + BIOS_DATAAREA_ADDR + *tail) = syscode; 505 | *tail = (*tail == BIOS_KBDBUF + 30 ? BIOS_KBDBUF : *tail + 2); 506 | return true; // success 507 | } 508 | // buffer full 509 | //printf("kbd buffer full\n"); 510 | return false; 511 | } 512 | 513 | 514 | // perform some INT 9 tasks (keyboard interrupt handler) 515 | // intput AL: 516 | // scancode as read from port 0x60 517 | // output AH: 518 | // 0 : normal key 519 | // 2 : CTRL + ALT + DEL 520 | // 3 : PRINTSCREEN 521 | // 4 : CTRL-BREAK (CTRL + PAUSE) 522 | // 5 : SYSREQ (ALT + PRINTSCREEN), down (AL = 0), up (AL = 1) 523 | void BIOS::getKeyFromKeyboard() 524 | { 525 | uint8_t * flags1 = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDSHIFTFLAGS1; 526 | uint8_t * flags2 = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDSHIFTFLAGS2; 527 | // saves current pause state 528 | bool onPause = *flags2 & 0x08; 529 | // update keyboard decoding state 530 | uint16_t syscode; // low byte = ASCII value, high byte = scancode 531 | bool toAdd = processScancode(i8086::AL(), &syscode); 532 | if (toAdd) { 533 | if (onPause) { 534 | // just disable pause state and discard key 535 | *flags2 &= ~0x08; 536 | } else { 537 | // we need to add this key to the keyboard buffer 538 | //printf("kbd store %04X\n", syscode); 539 | if (!storeKeyInKbdBuffer(syscode)) { 540 | // buffer full 541 | //printf("kbd buffer full\n"); 542 | } 543 | } 544 | } 545 | // check for special syskeys 546 | if ((*flags1 & 0x04) && (*flags1 & 0x08) && (syscode == 0x53e0 || syscode == 0x93e0 || syscode == 0xa300)) { 547 | i8086::setAH(2); 548 | } else if (m_memory[BIOS_DATAAREA_ADDR + BIOS_PRINTSCREENFLAG] == 1) { 549 | i8086::setAH(3); 550 | } else if (syscode == 0x0000) { 551 | i8086::setAH(4); 552 | } else if (*flags2 & 0x04) { 553 | i8086::setAH(5); 554 | i8086::setAL((bool)i8086::AL()); 555 | } else 556 | i8086::setAH(0); 557 | } 558 | 559 | 560 | // get or extract key from keyboard buffer 561 | // updates keyboard LEDs 562 | // input AL: 563 | // bit 0 : 0 = check only, 1 = extract 564 | // bit 1 : 0 = do not filter, 1 = filter extended keys 565 | // output: 566 | // AX : ASCII (AL) and scancode (AH) 567 | // ZF : 0 = key present, 1 = key not present 568 | void BIOS::getKeyFromBuffer() 569 | { 570 | // this LUT transform extended keyboard syskeys to XT syscodes 571 | struct Ext2XT { 572 | uint16_t esyscode; 573 | uint16_t xsyscode; // 0xffff = don't return 574 | }; 575 | static const Ext2XT EXT2XT[] = { 576 | { 0x2900, 0xffff }, { 0x0e00, 0xffff }, { 0x9400, 0xffff }, { 0xa500, 0xffff }, { 0x1a00, 0xffff }, { 0x1b00, 0xffff }, { 0x2b00, 0xffff }, 577 | { 0x2700, 0xffff }, { 0x2800, 0xffff }, { 0x1c00, 0xffff }, { 0x3300, 0xffff }, { 0x3400, 0xffff }, { 0x3500, 0xffff }, { 0x52e0, 0x5200 }, 578 | { 0x92e0, 0xffff }, { 0xa200, 0xffff }, { 0x53e0, 0x5300 }, { 0x93e0, 0xffff }, { 0xa300, 0xffff }, { 0x4be0, 0x4b00 }, { 0x73e0, 0x7300 }, 579 | { 0x9b00, 0xffff }, { 0x47e0, 0x4700 }, { 0x77e0, 0x7700 }, { 0x9700, 0xffff }, { 0x4fe0, 0x4f00 }, { 0x75e0, 0x7500 }, { 0x9f00, 0xffff }, 580 | { 0x48e0, 0x4800 }, { 0x8de0, 0xffff }, { 0x9800, 0xffff }, { 0x50e0, 0x5000 }, { 0x91e0, 0xffff }, { 0xa000, 0xffff }, { 0x49e0, 0x4900 }, 581 | { 0x84e0, 0x8400 }, { 0x9900, 0xffff }, { 0x51e0, 0x5100 }, { 0x76e0, 0x7600 }, { 0xa100, 0xffff }, { 0x4de0, 0x4d00 }, { 0x74e0, 0x7400 }, 582 | { 0x9d00, 0xffff }, { 0xe02f, 0x352f }, { 0x9500, 0xffff }, { 0xa400, 0xffff }, { 0x8d00, 0xffff }, { 0x8f00, 0xffff }, { 0x9100, 0xffff }, 583 | { 0x9200, 0xffff }, { 0x9600, 0xffff }, { 0x3700, 0xffff }, { 0x9300, 0xffff }, { 0x8e00, 0xffff }, { 0x4a00, 0xffff }, { 0x9000, 0xffff }, 584 | { 0x4e00, 0xffff }, { 0xe00d, 0x1c0d }, { 0xe00a, 0x1c0a }, { 0xa600, 0xffff }, { 0x0100, 0xffff }, { 0x8500, 0xffff }, { 0x8700, 0xffff }, 585 | { 0x8900, 0xffff }, { 0x8b00, 0xffff }, { 0x8600, 0xffff }, { 0x8800, 0xffff }, { 0x8a00, 0xffff }, { 0x8c00, 0xffff }, 586 | }; 587 | 588 | // return value is not valid (ZF = 1) 589 | i8086::setFlagZF(1); 590 | 591 | auto head = (uint16_t*)(m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDBUFHEAD); 592 | auto tail = (uint16_t*)(m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDBUFTAIL); 593 | 594 | if (*head != *tail) { 595 | 596 | // get key from buffer head 597 | uint16_t k = * (uint16_t*) (m_memory + BIOS_DATAAREA_ADDR + *head); 598 | 599 | bool filtered = false; 600 | 601 | // filter extended keys? 602 | if (i8086::AL() & 0x02) { 603 | for (int i = 0; i < sizeof(EXT2XT) / sizeof(Ext2XT); ++i) { 604 | if (EXT2XT[i].esyscode == k) { 605 | if (EXT2XT[i].xsyscode == 0xffff) 606 | filtered = true; // don't return 607 | else 608 | k = EXT2XT[i].xsyscode; // replace 609 | break; 610 | } 611 | } 612 | } 613 | 614 | // remove from buffer? 615 | if (filtered || (i8086::AL() & 0x01)) 616 | *head = (*head == BIOS_KBDBUF + 30 ? BIOS_KBDBUF : *head + 2); 617 | 618 | if (!filtered) { 619 | // return value is valid (ZF = 0) 620 | i8086::setFlagZF(0); 621 | i8086::setAX(k); 622 | } 623 | 624 | } 625 | 626 | // update LEDs 627 | bool numLockLED, capsLockLED, scrollLockLED; 628 | m_keyboard->getLEDs(&numLockLED, &capsLockLED, &scrollLockLED); 629 | uint8_t LEDs = m_memory[BIOS_DATAAREA_ADDR + BIOS_KBDLEDS]; 630 | if (numLockLED != (bool)(LEDs & 0x02) || capsLockLED != (bool)(LEDs & 0x04) || scrollLockLED != (bool)(LEDs & 0x01)) 631 | m_keyboard->setLEDs((bool)(LEDs & 0x02), (bool)(LEDs & 0x04), (bool)(LEDs & 0x01)); 632 | } 633 | 634 | 635 | void BIOS::emptyKbdBuffer() 636 | { 637 | auto head = (uint16_t*)(m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDBUFHEAD); 638 | auto tail = (uint16_t*)(m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDBUFTAIL); 639 | *tail = *head; 640 | } 641 | 642 | 643 | // get shift flags or extended shift flags 644 | // input AL: 645 | // bit 0 : 0 = normal flags in AL, 1 = normal flags in AL and extended flags in AH 646 | // output AL or AX 647 | void BIOS::getKeyboardFlags() 648 | { 649 | uint8_t * flags1 = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDSHIFTFLAGS1; 650 | uint8_t * flags2 = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDSHIFTFLAGS2; 651 | uint8_t * mode = m_memory + BIOS_DATAAREA_ADDR + BIOS_KBDMODE; 652 | if (i8086::AL() & 1) 653 | i8086::setAH( (*flags2 & 0xf3) | (*mode & 0x0c) ); 654 | i8086::setAL(*flags1); 655 | } 656 | 657 | 658 | // inputs: 659 | // AL : service (0x05 = set typematic rate and delay) 660 | // BH : delay value (as expected by BIOS, 0 = 250ms, 1 = 500ms, etc...) 661 | // BL : typematic rate (as expected by BIOS, 0 = 30, 1 = 26.7, etc...) 662 | // notes: 663 | // this method doesn't use 0x60 and 0x64 ports, but directly interfaces to the Keyboard object 664 | void BIOS::setKeyboardTypematicAndDelay() 665 | { 666 | if (i8086::AL() == 0x05) { 667 | // send command "set typematic rate and delay" (0xF3) to the keyboard and wait for ACK (0xFA) 668 | if (!m_keyboard->sendCommand(0xF3, 0xFA)) 669 | return; 670 | // send parameters 671 | m_keyboard->sendCommand(i8086::BL() | (i8086::BH() << 5), 0xFA); 672 | } 673 | } 674 | 675 | 676 | // inputs: 677 | // CL : ASCII character 678 | // CH : scan code 679 | // outputs: 680 | // AL : 0 = no error, 1 = keyboard buffer full 681 | // CF : 0 = no error, 1 = keyboard buffer full 682 | void BIOS::storeKeyboardKeyData() 683 | { 684 | bool r = storeKeyInKbdBuffer(i8086::CX()); 685 | i8086::setAL(!r); 686 | i8086::setFlagCF(!r); 687 | } 688 | 689 | 690 | // Implements all services of "INT 15 Function C2h" 691 | // inputs: 692 | // AL : subfunction 693 | // .. : depends by the subfunction 694 | // outputs: 695 | // AH : 0 = success, >0 = error (see "INT 15h Function C2h - Pointing Device Interface") 696 | // CF : 0 = successful, 1 = unsuccessful 697 | // .. : depends by the subfunction 698 | void BIOS::pointingDeviceInterface() 699 | { 700 | if (m_mouse->isMouseAvailable()) { 701 | 702 | i8086::setAH(0x00); 703 | i8086::setFlagCF(0); 704 | 705 | switch (i8086::AL()) { 706 | 707 | // Enable/disable pointing device 708 | // inputs: 709 | // AL : 0x00 710 | // BH : 0 = disable, 1 = enable 711 | case 0x00: 712 | m_i8042->enableMouse(i8086::BH()); 713 | break; 714 | 715 | // Reset pointing device 716 | // inputs: 717 | // AL : 0x01 718 | // outputs: 719 | // BH : Device ID 720 | case 0x01: 721 | m_i8042->enableMouse(false); // mouse disabled 722 | m_mouse->setSampleRate(100); // 100 reports/second 723 | m_mouse->setResolution(2); // 4 counts/millimeter 724 | m_mouse->setScaling(1); // 1:1 scaling 725 | i8086::setBH(m_mouse->deviceID() & 0xff); 726 | break; 727 | 728 | // Set sample rate 729 | // inputs: 730 | // AL : 0x02 731 | // BH : Sample rate 732 | case 0x02: 733 | m_mouse->setSampleRate(i8086::BH()); 734 | break; 735 | 736 | // Set resolution 737 | // inputs: 738 | // AL : 0x03 739 | // BH : Resolution value 740 | case 0x03: 741 | m_mouse->setResolution(i8086::BH()); 742 | break; 743 | 744 | // Read device type 745 | // inputs: 746 | // AL : 0x04 747 | case 0x04: 748 | i8086::setBH(m_mouse->deviceID() & 0xff); 749 | break; 750 | 751 | // Initialize pointing device interface 752 | // inputs: 753 | // AL : 0x05 754 | // BH : Data package size (1-8, in bytes) 755 | // note: this value is acqually ignored because we get actual packet size from Mouse object 756 | case 0x05: 757 | { 758 | m_i8042->enableMouse(false); // mouse disabled 759 | m_mouse->setSampleRate(100); // 100 reports/second 760 | m_mouse->setResolution(2); // 4 counts/millimeter 761 | m_mouse->setScaling(1); // 1:1 scaling 762 | uint8_t * EBDA = m_memory + EBDA_ADDR; 763 | EBDA[EBDA_DRIVER_OFFSET] = 0x0000; 764 | EBDA[EBDA_DRIVER_SEG] = 0x0000; 765 | EBDA[EBDA_FLAGS1] = 0x00; 766 | EBDA[EBDA_FLAGS2] = m_mouse->getPacketSize(); // instead of i8086::BH()!! 767 | break; 768 | } 769 | 770 | // Set scaling or get status 771 | // inputs: 772 | // AL : 0x06 773 | // BH : subfunction 774 | case 0x06: 775 | switch (i8086::BH()) { 776 | // Set scaling factor to 1:1 777 | // inputs: 778 | // BH : 0x01 779 | case 0x01: 780 | m_mouse->setScaling(1); 781 | break; 782 | // Set scaling factor to 2:1 783 | // inputs: 784 | // BH : 0x02 785 | case 0x02: 786 | m_mouse->setScaling(2); 787 | break; 788 | default: 789 | // not implements 790 | printf("Pointing device function 06:%02X not implemented\n", i8086::BH()); 791 | i8086::setAH(0x86); 792 | i8086::setFlagCF(1); 793 | break; 794 | } 795 | break; 796 | 797 | // Set pointing device handler address 798 | // inputs: 799 | // AL = 0x07 800 | // ES:BX : Pointer to application-program's device driver 801 | case 0x07: 802 | { 803 | uint8_t * EBDA = m_memory + EBDA_ADDR; 804 | *(uint16_t*)(EBDA + EBDA_DRIVER_OFFSET) = i8086::BX(); 805 | *(uint16_t*)(EBDA + EBDA_DRIVER_SEG) = i8086::ES(); 806 | EBDA[EBDA_FLAGS2] |= 0x80; // set handler installed flag 807 | break; 808 | } 809 | 810 | default: 811 | // not implements 812 | printf("Pointing device function %02X not implemented\n", i8086::AL()); 813 | i8086::setAH(0x86); 814 | i8086::setFlagCF(1); 815 | break; 816 | } 817 | 818 | } else { 819 | // mouse not available 820 | i8086::setAH(0x03); // 0x03 = interface error 821 | i8086::setFlagCF(1); 822 | } 823 | } 824 | 825 | 826 | // convert packed BCD to decimal 827 | static uint8_t BCDtoByte(uint8_t v) 828 | { 829 | return (v & 0x0F) + (v >> 4) * 10; 830 | } 831 | 832 | 833 | // synchronize system ticks with RTC 834 | void BIOS::syncTicksWithRTC() 835 | { 836 | m_MC146818->updateTime(); 837 | int ss = BCDtoByte(m_MC146818->reg(0x00)); 838 | int mm = BCDtoByte(m_MC146818->reg(0x02)); 839 | int hh = BCDtoByte(m_MC146818->reg(0x04)); 840 | int totSecs = ss + mm * 60 + hh * 3600 + 1000; 841 | int64_t pitTicks = (int64_t)totSecs * PIT_TICK_FREQ; 842 | *(uint32_t*)(m_memory + BIOS_DATAAREA_ADDR + BIOS_SYSTICKS) = (uint32_t) (pitTicks / 65536); 843 | } 844 | 845 | 846 | // INT 13 services 847 | void BIOS::diskHandlerEntry() 848 | { 849 | if (i8086::DL() < 2) 850 | diskHandler_floppy(); 851 | else 852 | diskHandler_HD(); 853 | } 854 | 855 | 856 | void BIOS::diskHandler_floppy() 857 | { 858 | int drive = i8086::DL(); 859 | int service = i8086::AH(); 860 | 861 | //printf("INT 13h, FDD (%d), service %02X\n", drive, service); 862 | 863 | if (m_machine->disk(drive) == nullptr) { 864 | // invalid drive 865 | diskHandler_floppyExit(0x80, true); 866 | return; 867 | } 868 | 869 | switch (service) { 870 | 871 | // Reset Diskette System 872 | case 0x00: 873 | diskHandler_floppyExit(m_mediaType[drive] == mediaUnknown ? 0x06 : 0x00, true); 874 | return; 875 | 876 | // Read Diskette Status 877 | case 0x01: 878 | diskHandler_floppyExit(m_memory[BIOS_DATAAREA_ADDR + BIOS_DISKLASTSTATUS], false); 879 | m_memory[BIOS_DATAAREA_ADDR + BIOS_DISKLASTSTATUS] = 0; // this function resets BIOS_DISKLASTSTATUS 880 | return; 881 | 882 | // Read Diskette Sectors 883 | case 0x02: 884 | // Write Diskette Sectors 885 | case 0x03: 886 | // Verify Diskette Sectors 887 | case 0x04: 888 | { 889 | if (!checkDriveMediaType(drive)) { 890 | diskHandler_floppyExit(6, true); 891 | return; 892 | } 893 | uint32_t pos, dest, count; 894 | if (!diskHandler_calcAbsAddr(drive, &pos, &dest, &count)) { 895 | diskHandler_floppyExit(4, true); // sector not found 896 | return; 897 | } 898 | fseek(m_machine->disk(drive), pos, 0); 899 | size_t sects = i8086::AL(); 900 | if (service != 0x04) { 901 | sects = service == 0x02 ? 902 | fread(m_memory + dest, 1, count, m_machine->disk(drive)) : 903 | fwrite(m_memory + dest, 1, count, m_machine->disk(drive)); 904 | sects /= 512; 905 | } 906 | i8086::setAL(sects); 907 | diskHandler_floppyExit(sects == 0 ? 4 : 0, true); 908 | return; 909 | } 910 | 911 | // Format Diskette Track 912 | case 0x05: 913 | { 914 | int sectsCountToFormat = i8086::AL(); 915 | int track = i8086::CH(); 916 | int head = i8086::DH(); 917 | uint32_t tableAddr = i8086::ES() * 16 + i8086::BX(); 918 | 919 | int SPT = m_machine->diskSectors(drive); 920 | int tracksCount = m_machine->diskCylinders(drive); 921 | 922 | uint8_t fillByte = m_memory[getDriveMediaTableAddr(drive) + 8]; 923 | 924 | uint8_t * buf = (uint8_t*) malloc(512); 925 | memset(buf, fillByte, 512); 926 | 927 | for (int i = 0; i < sectsCountToFormat; ++i) { 928 | int ttrack = m_memory[tableAddr++]; 929 | int thead = m_memory[tableAddr++]; 930 | int tsect = m_memory[tableAddr++]; 931 | int tsectSz = 128 << m_memory[tableAddr++]; 932 | if (ttrack != track || thead > 1 || tsect > SPT || tsectSz != 512 || track >= tracksCount) { 933 | // error 934 | free(buf); 935 | diskHandler_floppyExit(0x04, true); 936 | return; 937 | } 938 | fseek(m_machine->disk(drive), 512 * ((track * 2 + head) * SPT + (tsect - 1)), 0); 939 | fwrite(buf, 1, 512, m_machine->disk(drive)); 940 | //printf(" track=%d head=%d sect=%d pos=%d fill=%02X\n", track, head, tsect, 512 * ((track * 2 + head) * SPT + (tsect - 1)), fillByte); 941 | } 942 | free(buf); 943 | diskHandler_floppyExit(0x00, true); 944 | return; 945 | } 946 | 947 | // Read Drive Parameters 948 | case 0x08: 949 | i8086::setAX(0x0000); 950 | i8086::setBH(0x00); 951 | if (!checkDriveMediaType(drive)) { 952 | i8086::setCX(0x0000); 953 | i8086::setDX(0x0000); 954 | i8086::setES(0x0000); 955 | i8086::setDI(0x0000); 956 | diskHandler_floppyExit(6, true); 957 | return; 958 | } 959 | switch (m_mediaType[drive]) { 960 | case floppy160KB: 961 | case floppy180KB: 962 | case floppy320KB: 963 | // @TODO: check this 964 | i8086::setBL(0x01); 965 | break; 966 | case floppy360KB: 967 | i8086::setBL(0x01); 968 | break; 969 | case floppy720KB: 970 | i8086::setBL(0x03); 971 | break; 972 | case floppy1M2K: 973 | i8086::setBL(0x02); 974 | break; 975 | case floppy1M44K: 976 | i8086::setBL(0x04); 977 | break; 978 | case floppy2M88K: 979 | i8086::setBL(0x05); 980 | break; 981 | case mediaUnknown: 982 | default: 983 | // not possible here 984 | break; 985 | } 986 | i8086::setCH(m_machine->diskCylinders(drive) - 1); // max usable track number 987 | i8086::setCL(m_machine->diskSectors(drive)); // max usable sector number 988 | i8086::setDH(m_machine->diskHeads(drive) - 1); // max usable head number 989 | i8086::setDL((bool)(m_machine->disk(0)) + (bool)(m_machine->disk(1))); // number of diskette installed 990 | // Pointer to Diskette Parameters table for the maximum media type supported on the specified drive 991 | i8086::setES(BIOS_SEG); 992 | i8086::setDI(m_origInt1EAddr - BIOS_SEG * 16); 993 | diskHandler_floppyExit(0, true); 994 | //printf(" INT 13h, FDD, 08h: BL=%d, CH=%d, CL=%d, DL=%d\n", i8086::BL(), i8086::CH(), i8086::CL(), i8086::DL()); 995 | return; 996 | 997 | // Read Drive Type 998 | case 0x15: 999 | diskHandler_floppyExit(0, true); 1000 | i8086::setAH(m_machine->disk(drive) ? 0x02 : 0x00); 1001 | return; 1002 | 1003 | // Detect Media Change 1004 | case 0x16: 1005 | diskHandler_floppyExit(m_mediaType[drive] == mediaUnknown ? 0x06 : 0x00, true); 1006 | return; 1007 | 1008 | // Set Diskette Type 1009 | case 0x17: 1010 | switch (i8086::AL()) { 1011 | 1012 | // 320K/360K 1013 | case 0x01: 1014 | diskHandler_floppyExit(m_mediaType[drive] != floppy360KB && 1015 | m_mediaType[drive] != floppy320KB && 1016 | m_mediaType[drive] != floppy180KB && 1017 | m_mediaType[drive] != floppy160KB, true); 1018 | break; 1019 | 1020 | // 360K 1021 | case 0x02: 1022 | diskHandler_floppyExit(m_mediaType[drive] != floppy360KB, true); 1023 | break; 1024 | 1025 | // 1.2MB 1026 | case 0x03: 1027 | diskHandler_floppyExit(m_mediaType[drive] != floppy1M2K, true); 1028 | break; 1029 | 1030 | // 720KB 1031 | case 0x04: 1032 | diskHandler_floppyExit(m_mediaType[drive] != floppy720KB, true); 1033 | break; 1034 | 1035 | // error 1036 | default: 1037 | diskHandler_floppyExit(1, true); 1038 | break; 1039 | 1040 | } 1041 | return; 1042 | 1043 | // Set Media Type for Format 1044 | case 0x18: 1045 | { 1046 | // check if proposed media type matches with current 1047 | int propTracks = i8086::CH(); 1048 | int propSPT = i8086::CL(); 1049 | int tracks = m_machine->diskCylinders(drive) - 1; 1050 | int SPT = m_machine->diskSectors(drive); 1051 | if (propTracks == tracks && propSPT == SPT) { 1052 | // match ok 1053 | diskHandler_floppyExit(0x00, true); 1054 | i8086::setES(BIOS_SEG); 1055 | i8086::setDI(m_origInt1EAddr - BIOS_SEG * 16); 1056 | } else { 1057 | // not supported 1058 | diskHandler_floppyExit(0x0c, true); 1059 | printf(" INT 13h, FDD, 18h: unsupported media type, t=%d (%d), s=%d (%d)\n", propTracks, tracks, propSPT, SPT); 1060 | } 1061 | return; 1062 | } 1063 | 1064 | default: 1065 | // invalid function 1066 | diskHandler_floppyExit(1, true); 1067 | printf(" INT 13h, FDD, invalid service %02X\n", service); 1068 | return; 1069 | 1070 | } 1071 | } 1072 | 1073 | 1074 | // CH : low 8 bits of track number 1075 | // CL 6...7 : high 2 bits of track number 1076 | // CL 0...5 : sector number 1077 | // DH : head number 1078 | // AL : number of sectors to read 1079 | // ES:BX : destination address 1080 | bool BIOS::diskHandler_calcAbsAddr(int drive, uint32_t * pos, uint32_t * dest, uint32_t * count) 1081 | { 1082 | int sectorsPerTrack = m_machine->diskSectors(drive); 1083 | int heads = m_machine->diskHeads(drive); 1084 | int track = i8086::CH() | (((uint16_t)i8086::CL() & 0xc0) << 2); 1085 | int sector = i8086::CL() & 0x3f; 1086 | int head = i8086::DH(); 1087 | if (sector > sectorsPerTrack) 1088 | return false; 1089 | *pos = 512 * ((track * heads + head) * sectorsPerTrack + (sector - 1)); 1090 | *dest = i8086::ES() * 16 + i8086::BX(); 1091 | *count = i8086::AL() * 512; 1092 | return true; 1093 | } 1094 | 1095 | 1096 | void BIOS::diskHandler_floppyExit(uint8_t err, bool setErrStat) 1097 | { 1098 | i8086::setAH(err); 1099 | i8086::setFlagCF(err ? 1 : 0); 1100 | if (setErrStat) 1101 | m_memory[BIOS_DATAAREA_ADDR + BIOS_DISKLASTSTATUS] = err; 1102 | 1103 | /* 1104 | if (err > 0) 1105 | printf(" err = %d\n", err); 1106 | */ 1107 | } 1108 | 1109 | 1110 | void BIOS::diskHandler_HD() 1111 | { 1112 | int drive = (i8086::DL() & 1) + 2; // 2 = HD0, 3 = HD1 1113 | int service = i8086::AH(); 1114 | 1115 | //printf("INT 13h, HDD (%d), service %02X [AH=%02X DL=%02X]\n", drive, service, i8086::AH(), i8086::DL()); 1116 | 1117 | if (m_machine->disk(drive) == nullptr || i8086::DL() > 0x81) { 1118 | // invalid drive 1119 | diskHandler_HDExit(0x80, true); 1120 | return; 1121 | } 1122 | 1123 | switch (service) { 1124 | 1125 | // Reset Fixed Disk System 1126 | case 0x00: 1127 | diskHandler_HDExit(checkDriveMediaType(drive) ? 0x00 : 0x80, true); 1128 | return; 1129 | 1130 | // Read Disk Status 1131 | case 0x01: 1132 | diskHandler_HDExit(m_memory[BIOS_DATAAREA_ADDR + BIOS_HDLASTSTATUS], false); 1133 | m_memory[BIOS_DATAAREA_ADDR + BIOS_HDLASTSTATUS] = 0; // this function resets BIOS_HDLASTSTATUS 1134 | return; 1135 | 1136 | // Read Fixed Disk Sectors 1137 | case 0x02: 1138 | // Write Fixed Disk Sectors 1139 | case 0x03: 1140 | // Verify Fixed Disk Sectors 1141 | case 0x04: 1142 | { 1143 | if (!checkDriveMediaType(drive)) { 1144 | diskHandler_HDExit(0x80, true); 1145 | return; 1146 | } 1147 | uint32_t pos, dest, count; 1148 | if (!diskHandler_calcAbsAddr(drive, &pos, &dest, &count)) { 1149 | diskHandler_HDExit(4, true); // sector not found 1150 | return; 1151 | } 1152 | fseek(m_machine->disk(drive), pos, 0); 1153 | size_t sects = i8086::AL(); 1154 | if (service != 0x04) { 1155 | sects = service == 0x02 ? 1156 | fread(m_memory + dest, 1, count, m_machine->disk(drive)) : 1157 | fwrite(m_memory + dest, 1, count, m_machine->disk(drive)); 1158 | sects /= 512; 1159 | } 1160 | i8086::setAL(sects); 1161 | diskHandler_HDExit(sects == 0 ? 4 : 0, true); 1162 | return; 1163 | } 1164 | 1165 | // Format Disk Cylinder 1166 | case 0x05: 1167 | diskHandler_HDExit(0x00, true); 1168 | return; 1169 | 1170 | // Read Drive Parameters 1171 | case 0x08: 1172 | i8086::setAL(0x00); 1173 | if (checkDriveMediaType(drive)) { 1174 | uint16_t maxUsableCylNum = m_machine->diskCylinders(drive) - 1; 1175 | uint8_t maxUsableSecNum = m_machine->diskSectors(drive); 1176 | uint8_t maxUsableHeadNum = m_machine->diskHeads(drive) - 1; 1177 | i8086::setCH(maxUsableCylNum & 0xff); // Maximum usable cylinder number (low 8 bits) 1178 | i8086::setCL(((maxUsableCylNum >> 2) & 0xc0) | // Bits 7-6 = Maximum usable cylinder number (high 2 bits) 1179 | (maxUsableSecNum & 0x3f)); // Bits 5-0 = Maximum usable sector number 1180 | i8086::setDH(maxUsableHeadNum); // Maximum usable head number 1181 | i8086::setDL((bool)(m_machine->disk(2)) + (bool)(m_machine->disk(3))); // Number of drives (@TODO: correct? Docs not clear) 1182 | // Address of Fixed Disk Parameters table 1183 | // *** note: some texts tell ES:DI should return a pointer to parameters table. IBM docs don't. Actually 1184 | // returning ES:DI may crash old MSDOS versions! 1185 | //i8086::setES(BIOS_SEG); 1186 | //i8086::setDI(getDriveMediaTableAddr(drive) - BIOS_SEG * 16); 1187 | /* 1188 | printf("CH = %02X CL = %02X DH = %02X DL = %02X\n", i8086::CH(), i8086::CL(), i8086::DH(), i8086::DL()); 1189 | printf("ES = %04X DI = %04X\n", i8086::ES(), i8086::DI()); 1190 | printf("ES:DI [00-01] = %d\n", (int) *(uint16_t*)(m_memory + i8086::ES() * 16 + i8086::DI() + 0x00)); 1191 | printf("ES:DI [02] = %d\n", (int) *(uint8_t*)(m_memory + i8086::ES() * 16 + i8086::DI() + 0x02)); 1192 | printf("ES:DI [0e] = %d\n", (int) *(uint8_t*)(m_memory + i8086::ES() * 16 + i8086::DI() + 0x0e)); 1193 | */ 1194 | diskHandler_HDExit(0x00, true); 1195 | } else { 1196 | i8086::setCX(0x0000); 1197 | i8086::setDX(0x0000); 1198 | diskHandler_HDExit(0x80, true); 1199 | } 1200 | return; 1201 | 1202 | // Initialize Drive Parameters 1203 | case 0x09: 1204 | // Seek to Cylinder 1205 | case 0x0c: 1206 | // Recalibrate Drive 1207 | case 0x11: 1208 | // Controller Internal Diagnostic 1209 | case 0x14: 1210 | diskHandler_HDExit(checkDriveMediaType(drive) ? 0x00 : 0x80, true); 1211 | return; 1212 | 1213 | // Test for Drive Ready 1214 | case 0x10: 1215 | diskHandler_HDExit(checkDriveMediaType(drive) ? 0x00 : 0xAA, true); 1216 | return; 1217 | 1218 | // Read Disk Type 1219 | case 0x15: 1220 | if (checkDriveMediaType(drive)) { 1221 | diskHandler_HDExit(0x00, true); 1222 | i8086::setAH(0x03);// drive present 1223 | auto sectors = m_machine->diskSize(drive) / 512; 1224 | i8086::setDX(sectors & 0xffff); 1225 | i8086::setCX(sectors >> 16); 1226 | } else { 1227 | i8086::setAX(0x0000); 1228 | i8086::setCX(0x0000); 1229 | i8086::setDX(0x0000); 1230 | diskHandler_HDExit(0x00, true); // yes, it is 0x00! 1231 | } 1232 | return; 1233 | 1234 | default: 1235 | // invalid function 1236 | printf("INT 13h, HDD, invalid service %02X\n", service); 1237 | diskHandler_HDExit(1, true); 1238 | return; 1239 | 1240 | } 1241 | } 1242 | 1243 | 1244 | void BIOS::diskHandler_HDExit(uint8_t err, bool setErrStat) 1245 | { 1246 | i8086::setAH(err); 1247 | i8086::setFlagCF(err ? 1 : 0); 1248 | if (setErrStat) 1249 | m_memory[BIOS_DATAAREA_ADDR + BIOS_HDLASTSTATUS] = err; 1250 | } 1251 | 1252 | 1253 | void BIOS::videoHandlerEntry() 1254 | { 1255 | auto ga = m_machine->graphicsAdapter(); 1256 | auto fb = m_machine->frameBuffer(); 1257 | 1258 | switch (i8086::AH()) { 1259 | 1260 | // Write Pixel 1261 | case 0x0c: 1262 | switch (ga->emulation()) { 1263 | 1264 | case GraphicsAdapter::Emulation::PC_Graphics_320x200_4Colors: 1265 | { 1266 | constexpr uint32_t rowlen = 320 / 4; 1267 | const uint8_t value = i8086::AL() & 0b11; 1268 | const bool xored = i8086::AL() & 0x80; 1269 | const uint32_t col = i8086::CX(); 1270 | const uint32_t row = i8086::DX(); 1271 | const uint32_t addr = (row >> 1) * rowlen + (col >> 2) + (row & 1) * 0x2000; 1272 | const uint32_t shift = 6 - (col & 3) * 2; 1273 | if (xored) 1274 | fb[addr] ^= value << shift; 1275 | else 1276 | fb[addr] = (fb[addr] & ~(0b11 << shift)) | (value << shift); 1277 | break; 1278 | } 1279 | 1280 | case GraphicsAdapter::Emulation::PC_Graphics_640x200_2Colors: 1281 | printf("INT 10h, write pixel, unsupported 640x200x2 resolution\n"); 1282 | break; 1283 | 1284 | case GraphicsAdapter::Emulation::PC_Graphics_HGC_720x348: 1285 | printf("INT 10h, write pixel, unsupported 720x348x2 resolution\n"); 1286 | break; 1287 | 1288 | default: 1289 | printf("INT 10h, write pixel, unsupported resolution\n"); 1290 | break; 1291 | 1292 | } 1293 | break; 1294 | 1295 | default: 1296 | printf("unsupported INT 10h, AX = %04X\n", i8086::AX()); 1297 | break; 1298 | 1299 | } 1300 | } 1301 | -------------------------------------------------------------------------------- /bios.h: -------------------------------------------------------------------------------- 1 | /* 2 | Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - 3 | Copyright (c) 2019-2022 Fabrizio Di Vittorio. 4 | All rights reserved. 5 | 6 | 7 | * Please contact fdivitto2013@gmail.com if you need a commercial license. 8 | 9 | 10 | * This library and related software is available under GPL v3. 11 | 12 | FabGL is free software: you can redistribute it and/or modify 13 | it under the terms of the GNU General Public License as published by 14 | the Free Software Foundation, either version 3 of the License, or 15 | (at your option) any later version. 16 | 17 | FabGL is distributed in the hope that it will be useful, 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 | GNU General Public License for more details. 21 | 22 | You should have received a copy of the GNU General Public License 23 | along with FabGL. If not, see . 24 | */ 25 | 26 | 27 | #pragma once 28 | 29 | 30 | #include "fabgl.h" 31 | #include "emudevs/i8042.h" 32 | #include "emudevs/MC146818.h" 33 | 34 | 35 | 36 | // 0 = floppy 0 (fd0, A:) 37 | // 1 = floppy 1 (fd1, B:) 38 | // 2 = hard disk 0 (hd0, C: or D:, depends by partitions) 39 | // 3 = hard disk 1 (hd1) 40 | constexpr int DISKCOUNT = 4; 41 | 42 | 43 | #define BIOS_SEG 0xF000 44 | #define BIOS_OFF 0x0100 45 | #define BIOS_ADDR (BIOS_SEG * 16 + BIOS_OFF) 46 | 47 | 48 | // BIOS Data Area 49 | 50 | #define BIOS_DATAAREA_SEG 0x40 51 | #define BIOS_DATAAREA_ADDR (BIOS_DATAAREA_SEG << 4) 52 | 53 | #define BIOS_KBDSHIFTFLAGS1 0x17 // keyboard shift flags 54 | #define BIOS_KBDSHIFTFLAGS2 0x18 // more keyboard shift flags 55 | #define BIOS_KBDALTKEYPADENTRY 0x19 // Storage for alternate keypad entry 56 | #define BIOS_KBDBUFHEAD 0x1a // pointer to next character in keyboard buffer 57 | #define BIOS_KBDBUFTAIL 0x1c // pointer to first available spot in keyboard buffer 58 | #define BIOS_KBDBUF 0x1e // keyboard buffer (32 bytes, 16 keys, but actually 15) 59 | #define BIOS_DISKLASTSTATUS 0x41 // diskette status return code 60 | #define BIOS_SYSTICKS 0x6c // system ticks (dword) 61 | #define BIOS_CLKROLLOVER 0x70 // system tick rollover flag (24h) 62 | #define BIOS_CTRLBREAKFLAG 0x71 // Ctrl-Break flag 63 | #define BIOS_HDLASTSTATUS 0x74 // HD status return code 64 | #define BIOS_NUMHD 0x75 // number of fixed disk drives 65 | #define BIOS_DRIVE0MEDIATYPE 0x90 // media type of drive 0 66 | #define BIOS_DRIVE1MEDIATYPE 0x91 // media type of drive 1 67 | #define BIOS_KBDMODE 0x96 // keyboard mode and other shift flags 68 | #define BIOS_KBDLEDS 0x97 // keyboard LEDs 69 | #define BIOS_PRINTSCREENFLAG 0x100 // PRINTSCREEN flag 70 | 71 | 72 | // Extended BIOS Data Area (EBDA) 73 | 74 | #define EBDA_SEG 0x9fc0 // EBDA Segment, must match with same value in bios.asm 75 | #define EBDA_ADDR (EBDA_SEG << 4) 76 | 77 | #define EBDA_DRIVER_OFFSET 0x22 // Pointing device device driver far call offset 78 | #define EBDA_DRIVER_SEG 0x24 // Pointing device device driver far call segment 79 | #define EBDA_FLAGS1 0x26 // Flags 1 (bits 0-2: recv data index) 80 | #define EBDA_FLAGS2 0x27 // Flags 2 (bits 0-2: packet size, bit 7: device handler installed) 81 | #define EBDA_PACKET 0x28 // Start of packet 82 | 83 | 84 | 85 | 86 | using fabgl::PS2Controller; 87 | using fabgl::Keyboard; 88 | using fabgl::Mouse; 89 | using fabgl::i8042; 90 | using fabgl::MC146818; 91 | 92 | 93 | enum MediaType { 94 | mediaUnknown, 95 | floppy160KB, 96 | floppy180KB, 97 | floppy320KB, 98 | floppy360KB, 99 | floppy720KB, 100 | floppy1M2K, 101 | floppy1M44K, 102 | floppy2M88K, 103 | 104 | HDD, 105 | }; 106 | 107 | class Machine; 108 | 109 | 110 | class BIOS { 111 | 112 | public: 113 | 114 | BIOS(); 115 | 116 | void init(Machine * machine); 117 | void reset(); 118 | 119 | void helpersEntry(); 120 | 121 | void diskHandlerEntry(); 122 | 123 | void videoHandlerEntry(); 124 | 125 | void setDriveMediaType(int drive, MediaType media); 126 | 127 | private: 128 | 129 | void getKeyFromKeyboard(); 130 | void getKeyFromBuffer(); 131 | void getKeyboardFlags(); 132 | void setKeyboardTypematicAndDelay(); 133 | void storeKeyboardKeyData(); 134 | 135 | bool storeKeyInKbdBuffer(uint16_t syscode); 136 | bool processScancode(int scancode, uint16_t * syscode); 137 | void emptyKbdBuffer(); 138 | 139 | void pointingDeviceInterface(); 140 | 141 | void syncTicksWithRTC(); 142 | 143 | void diskHandler_floppy(); 144 | bool diskHandler_calcAbsAddr(int drive, uint32_t * pos, uint32_t * dest, uint32_t * count); 145 | void diskHandler_floppyExit(uint8_t err, bool setErrStat); 146 | void diskHandler_HD(); 147 | void diskHandler_HDExit(uint8_t err, bool setErrStat); 148 | 149 | bool checkDriveMediaType(int drive); 150 | uint32_t getDriveMediaTableAddr(int drive); 151 | 152 | 153 | Machine * m_machine; 154 | uint8_t * m_memory; 155 | Keyboard * m_keyboard; 156 | Mouse * m_mouse; 157 | i8042 * m_i8042; 158 | MC146818 * m_MC146818; 159 | 160 | // state of multibyte scancode intermediate reception: 161 | // 0 = none 162 | // pause (0xe1 0x1d 0x45 0xe1 0x9d 0xc5): 1 = 0x1d, 2 = 0x45, 3 = 0x9d 163 | uint8_t m_kbdScancodeComp; 164 | 165 | // address of bios.asm:media_drive_parameters (0, 1) 166 | // address of int41 (2), int46 (3) 167 | //uint32_t m_mediaDriveParametersAddr[4]; 168 | 169 | // original int 1e address (may be changed by O.S.) 170 | uint32_t m_origInt1EAddr; 171 | 172 | // media type for floppy (0,1) and HD (>=2) 173 | MediaType m_mediaType[DISKCOUNT]; 174 | 175 | 176 | }; 177 | -------------------------------------------------------------------------------- /machine.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - 3 | Copyright (c) 2019-2022 Fabrizio Di Vittorio. 4 | All rights reserved. 5 | 6 | 7 | * Please contact fdivitto2013@gmail.com if you need a commercial license. 8 | 9 | 10 | * This library and related software is available under GPL v3. 11 | 12 | FabGL is free software: you can redistribute it and/or modify 13 | it under the terms of the GNU General Public License as published by 14 | the Free Software Foundation, either version 3 of the License, or 15 | (at your option) any later version. 16 | 17 | FabGL is distributed in the hope that it will be useful, 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 | GNU General Public License for more details. 21 | 22 | You should have received a copy of the GNU General Public License 23 | along with FabGL. If not, see . 24 | */ 25 | 26 | 27 | #include "machine.h" 28 | 29 | #include 30 | #include 31 | #include 32 | #include 33 | #include 34 | 35 | 36 | #pragma GCC optimize ("O3") 37 | 38 | 39 | 40 | 41 | // CGA Craphics Card Ports Bits 42 | 43 | #define CGA_MODECONTROLREG_TEXT80 0x01 // 0 = 40x25, 1 = 80x25 44 | #define CGA_MODECONTROLREG_GRAPHICS 0x02 // 0 = text, 1 = graphics 45 | #define CGA_MODECONTROLREG_COLOR 0x04 // 0 = color, 1 = monochrome 46 | #define CGA_MODECONTROLREG_ENABLED 0x08 // 0 = video off, 1 = video on 47 | #define CGA_MODECONTROLREG_GRAPH640 0x10 // 0 = 320x200 graphics, 1 = 640x200 graphics 48 | #define CGA_MODECONTROLREG_BIT7BLINK 0x20 // 0 = text mode bit 7 controls background, 1 = text mode bit 7 controls blinking 49 | 50 | #define CGA_COLORCONTROLREG_BACKCOLR_MASK 0x0f // mask for 320x200 background color index (on 640x200 is the foreground) 51 | #define CGA_COLORCONTROLREG_HIGHINTENSITY 0x10 // select high intensity colors 52 | #define CGA_COLORCONTROLREG_PALETTESEL 0x20 // 0 is Green, red and brown, 1 is Cyan, magenta and white 53 | 54 | 55 | // Hercules (HGC) Ports Bits 56 | 57 | #define HGC_MODECONTROLREG_GRAPHICS 0x02 // 0 = text mode, 1 = graphics mode 58 | #define HGC_MODECONTROLREG_ENABLED 0x08 // 0 = video off, 1 = video on 59 | #define HGC_MODECONTROLREG_BIT7BLINK 0x20 // 0 = text mode bit 7 controls background, 1 = text mode bit 7 controls blinking 60 | #define HGC_MODECONTROLREG_GRAPHICSPAGE 0x80 // 0 = graphics mapped on page 0 (0xB0000), 1 = graphics mapped on page 1 (0xB8000) 61 | 62 | #define HGC_CONFSWITCH_ALLOWGRAPHICSMODE 0x01 // 0 = prevents graphics mode, 1 = allows graphics mode 63 | #define HGC_CONFSWITCH_ALLOWPAGE1 0x02 // 0 = prevents access to page 1, 1 = allows access to page 1 64 | 65 | 66 | // I/O expander (based on MCP23S17) ports 67 | 68 | #define EXTIO_CONFIG 0x00e0 // configuration port (see EXTIO_CONFIG_.... flags) 69 | // whole 8 bit ports handling 70 | #define EXTIO_DIRA 0x00e1 // port A direction (0 = input, 1 = output) 71 | #define EXTIO_DIRB 0x00e2 // port B direction (0 = input, 1 = output) 72 | #define EXTIO_PULLUPA 0x00e3 // port A pullup enable (0 = disabled, 1 = enabled) 73 | #define EXTIO_PULLUPB 0x00e4 // port B pullup enable (0 = disabled, 1 = enabled) 74 | #define EXTIO_PORTA 0x00e5 // port A read/write 75 | #define EXTIO_PORTB 0x00e6 // port B read/write 76 | // single GPIO handling 77 | #define EXTIO_GPIOSEL 0x00e7 // GPIO selection (0..7 = PA0..PA7, 8..15 = PB0..PB8) 78 | #define EXTIO_GPIOCONF 0x00e8 // selected GPIO direction and pullup (0 = input, 1 = output, 2 = input with pullup) 79 | #define EXTIO_GPIO 0x00e9 // selected GPIO read or write (0 = low, 1 = high) 80 | 81 | // I/O expander configuration bits 82 | #define EXTIO_CONFIG_AVAILABLE 0x01 // 1 = external IO available, 0 = not available 83 | #define EXTIO_CONFIG_INT_POLARITY 0x02 // 1 = positive polarity, 0 = negative polarity (default) 84 | 85 | 86 | 87 | ////////////////////////////////////////////////////////////////////////////////////// 88 | // Machine 89 | 90 | 91 | using fabgl::i8086; 92 | 93 | 94 | uint8_t * Machine::s_memory; 95 | uint8_t * Machine::s_videoMemory; 96 | 97 | 98 | Machine::Machine() : 99 | #ifdef FABGL_EMULATED 100 | m_stepCallback(nullptr), 101 | #endif 102 | m_diskFilename(), 103 | m_disk(), 104 | m_frameBuffer(nullptr), 105 | m_bootDrive(0), 106 | m_sysReqCallback(nullptr), 107 | m_baseDir(nullptr) 108 | { 109 | } 110 | 111 | 112 | Machine::~Machine() 113 | { 114 | for (int i = 0; i < DISKCOUNT; ++i) { 115 | free(m_diskFilename[i]); 116 | if (m_disk[i]) 117 | fclose(m_disk[i]); 118 | } 119 | vTaskDelete(m_taskHandle); 120 | free(s_videoMemory); 121 | } 122 | 123 | 124 | void Machine::init() 125 | { 126 | srand((uint32_t)time(NULL)); 127 | 128 | // to avoid PSRAM bug without -mfix-esp32-psram-cache-issue 129 | // core 0 can only work reliably with the lower 2 MB and core 1 only with the higher 2 MB. 130 | s_memory = (uint8_t*)(SOC_EXTRAM_DATA_LOW + (xPortGetCoreID() == 1 ? 2 * 1024 * 1024 : 0)); 131 | 132 | s_videoMemory = (uint8_t*)heap_caps_malloc(VIDEOMEMSIZE, MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL); 133 | 134 | memset(s_memory, 0, RAM_SIZE); 135 | 136 | m_soundGen.play(true); 137 | m_soundGen.attach(&m_sinWaveGen); 138 | 139 | m_i8042.init(); 140 | m_i8042.setCallbacks(this, keyboardInterrupt, mouseInterrupt, resetMachine, sysReq); 141 | 142 | m_PIT8253.setCallbacks(this, PITChangeOut); 143 | m_PIT8253.reset(); 144 | 145 | m_MC146818.init("PCEmulator"); 146 | m_MC146818.setCallbacks(this, MC146818Interrupt); 147 | 148 | m_MCP23S17.begin(); 149 | m_MCP23S17Sel = 0; 150 | 151 | m_BIOS.init(this); 152 | 153 | i8086::setCallbacks(this, readPort, writePort, writeVideoMemory8, writeVideoMemory16, readVideoMemory8, readVideoMemory16, interrupt); 154 | i8086::setMemory(s_memory); 155 | 156 | m_reset = true; 157 | } 158 | 159 | 160 | void Machine::setDriveImage(int drive, char const * filename, int cylinders, int heads, int sectors) 161 | { 162 | if (m_disk[drive]) { 163 | fclose(m_disk[drive]); 164 | m_disk[drive] = nullptr; 165 | } 166 | 167 | if (m_diskFilename[drive]) { 168 | free(m_diskFilename[drive]); 169 | m_diskFilename[drive] = nullptr; 170 | } 171 | 172 | m_BIOS.setDriveMediaType(drive, mediaUnknown); 173 | 174 | m_diskCylinders[drive] = cylinders; 175 | m_diskHeads[drive] = heads; 176 | m_diskSectors[drive] = sectors; 177 | 178 | if (filename) { 179 | m_diskFilename[drive] = strdup(filename); 180 | m_disk[drive] = FileBrowser(m_baseDir).openFile(filename, "r+b"); 181 | if (m_disk[drive]) { 182 | 183 | // get image file size 184 | fseek(m_disk[drive], 0L, SEEK_END); 185 | m_diskSize[drive] = ftell(m_disk[drive]); 186 | 187 | // need to detect geometry? 188 | if (cylinders == 0 || heads == 0 || sectors == 0) 189 | autoDetectDriveGeometry(drive); 190 | } 191 | } 192 | } 193 | 194 | 195 | void Machine::autoDetectDriveGeometry(int drive) 196 | { 197 | // well known floppy formats 198 | static const struct { 199 | uint16_t tracks; 200 | uint8_t sectors; 201 | uint8_t heads; 202 | } FLOPPYFORMATS[] = { 203 | { 40, 8, 1 }, // 163840 bytes (160K, 5.25 inch) 204 | { 40, 9, 1 }, // 184320 bytes (180K, 5.25 inch) 205 | { 40, 8, 2 }, // 327680 bytes (320K, 5.25 inch) 206 | { 40, 9, 2 }, // 368640 bytes (360K, 5.25 inch) 207 | { 80, 9, 2 }, // 737280 bytes (720K, 3.5 inch) 208 | { 80, 15, 2 }, // 1228800 bytes (1200K, 5.25 inch) 209 | { 80, 18, 2 }, // 1474560 bytes (1440K, 3.5 inch) 210 | { 80, 36, 2 }, // 2949120 bytes (2880K, 3.5 inch) 211 | }; 212 | 213 | // look for well known floppy formats 214 | for (auto const & ff : FLOPPYFORMATS) { 215 | if (512 * ff.tracks * ff.sectors * ff.heads == m_diskSize[drive]) { 216 | m_diskCylinders[drive] = ff.tracks; 217 | m_diskHeads[drive] = ff.heads; 218 | m_diskSectors[drive] = ff.sectors; 219 | //printf("autoDetectDriveGeometry, found floppy: t=%d s=%d h=%d\n", ff.tracks, ff.sectors, ff.heads); 220 | return; 221 | } 222 | } 223 | 224 | // maybe an hard disk, try to calculate geometry (max 528MB, common lower end for BIOS and MSDOS: https://tldp.org/HOWTO/Large-Disk-HOWTO-4.html) 225 | constexpr int MAXCYLINDERS = 1024; // Cylinders : 1...1024 226 | constexpr int MAXHEADS = 16; // Heads : 1...16 (actual limit is 256) 227 | constexpr int MAXSECTORS = 63; // Sectors : 1...63 228 | int c = 1, h = 1; 229 | int s = (int)(m_diskSize[drive] / 512); 230 | if (s > MAXSECTORS) { 231 | h = s / MAXSECTORS; 232 | s = MAXSECTORS; 233 | } 234 | if (h > MAXHEADS) { 235 | c = h / MAXHEADS; 236 | h = MAXHEADS; 237 | } 238 | if (c > MAXCYLINDERS) 239 | c = MAXCYLINDERS; 240 | m_diskCylinders[drive] = c; 241 | m_diskHeads[drive] = h; 242 | m_diskSectors[drive] = s; 243 | //printf("autoDetectDriveGeometry, found HD: c=%d h=%d s=%d (tot=%d filesz=%d)\n", m_diskCylinders[drive], m_diskHeads[drive], m_diskSectors[drive], 512 * m_diskCylinders[drive] * m_diskHeads[drive] * m_diskSectors[drive], (int)m_diskSize[drive]); 244 | 245 | } 246 | 247 | 248 | void Machine::reset() 249 | { 250 | m_reset = false; 251 | 252 | m_ticksCounter = 0; 253 | 254 | m_CGAMemoryOffset = 0; 255 | m_CGAModeReg = 0; 256 | m_CGAColorReg = 0; 257 | m_CGAVSyncQuery = 0; 258 | 259 | m_HGCMemoryOffset = 0; 260 | m_HGCModeReg = 0; 261 | m_HGCSwitchReg = 0; 262 | m_HGCVSyncQuery = 0; 263 | 264 | m_speakerDataEnable = false; 265 | 266 | m_i8042.reset(); 267 | 268 | m_PIC8259A.reset(); 269 | m_PIC8259B.reset(); 270 | 271 | m_PIT8253.reset(); 272 | m_PIT8253.setGate(0, true); 273 | //m_PIT8253.setGate(1, true); // @TODO: timer 1 used for DRAM refresh, required to run? 274 | 275 | m_MC146818.reset(); 276 | 277 | memset(m_CGA6845, 0, sizeof(m_CGA6845)); 278 | memset(m_HGC6845, 0, sizeof(m_HGC6845)); 279 | 280 | m_BIOS.reset(); 281 | 282 | i8086::reset(); 283 | 284 | // set boot drive (0, 1, 0x80, 0x81) 285 | i8086::setDL((m_bootDrive & 1) | (m_bootDrive > 1 ? 0x80 : 0x00)); 286 | } 287 | 288 | 289 | void Machine::run() 290 | { 291 | xTaskCreatePinnedToCore(&runTask, "", 4000, this, 5, &m_taskHandle, CoreUsage::quietCore()); 292 | } 293 | 294 | 295 | void IRAM_ATTR Machine::runTask(void * pvParameters) 296 | { 297 | auto m = (Machine*)pvParameters; 298 | 299 | m->init(); 300 | 301 | while (true) { 302 | 303 | if (m->m_reset) 304 | m->reset(); 305 | 306 | #ifdef FABGL_EMULATED 307 | pthread_testcancel(); 308 | if (m->m_stepCallback) 309 | m->m_stepCallback(m); 310 | #endif 311 | 312 | i8086::step(); 313 | m->tick(); 314 | 315 | } 316 | } 317 | 318 | 319 | void Machine::tick() 320 | { 321 | ++m_ticksCounter; 322 | 323 | if ((m_ticksCounter & 0x7f) == 0x7f) { 324 | m_PIT8253.tick(); 325 | // run keyboard controller every PIT tick (just to not overload CPU with continous checks) 326 | m_i8042.tick(); 327 | } 328 | 329 | if (m_PIC8259A.pendingInterrupt() && i8086::IRQ(m_PIC8259A.pendingInterruptNum())) 330 | m_PIC8259A.ackPendingInterrupt(); 331 | if (m_PIC8259B.pendingInterrupt() && i8086::IRQ(m_PIC8259B.pendingInterruptNum())) 332 | m_PIC8259B.ackPendingInterrupt(); 333 | 334 | } 335 | 336 | 337 | void Machine::setCGA6845Register(uint8_t value) 338 | { 339 | m_CGA6845[m_CGA6845SelectRegister] = value; 340 | 341 | switch (m_CGA6845SelectRegister) { 342 | 343 | // cursor start: (bits 5,6 = cursor blink and visibility control), bits 0..4 cursor start scanline 344 | case 0x0a: 345 | m_graphicsAdapter.setCursorVisible((m_CGA6845[0xa] >> 5) >= 2); 346 | // no break! 347 | // cursor end: bits 0..4 cursor end scanline 348 | case 0x0b: 349 | m_graphicsAdapter.setCursorShape(2 * (m_CGA6845[0xa] & 0x1f), 2 * (m_CGA6845[0xb] & 0x1f)); 350 | break; 351 | 352 | // video memory start offset (0x0c = H, 0x0d = L) 353 | case 0x0c: 354 | case 0x0d: 355 | m_CGAMemoryOffset = ((m_CGA6845[0xc] << 8) | m_CGA6845[0xd]) << 1; 356 | setCGAMode(); 357 | break; 358 | 359 | // cursor position (0x0e = H and 0x0f = L) 360 | case 0x0e: 361 | case 0x0f: 362 | { 363 | int pos = (m_CGA6845[0xe] << 8) | m_CGA6845[0xf]; 364 | m_graphicsAdapter.setCursorPos(pos / m_graphicsAdapter.getTextColumns(), pos % m_graphicsAdapter.getTextColumns()); 365 | break; 366 | } 367 | 368 | } 369 | } 370 | 371 | 372 | void Machine::setCGAMode() 373 | { 374 | if ((m_CGAModeReg & CGA_MODECONTROLREG_ENABLED) == 0) { 375 | 376 | // video disabled 377 | //printf("CGA, video disabled\n"); 378 | m_graphicsAdapter.enableVideo(false); 379 | 380 | } else if ((m_CGAModeReg & CGA_MODECONTROLREG_TEXT80) == 0 && (m_CGAModeReg & CGA_MODECONTROLREG_GRAPHICS) == 0) { 381 | 382 | // 40 column text mode 383 | //printf("CGA, 40 columns text mode\n"); 384 | m_frameBuffer = s_videoMemory + 0x8000 + m_CGAMemoryOffset; 385 | m_graphicsAdapter.setVideoBuffer(m_frameBuffer); 386 | m_graphicsAdapter.setEmulation(GraphicsAdapter::Emulation::PC_Text_40x25_16Colors); 387 | m_graphicsAdapter.setBit7Blink(m_CGAModeReg & CGA_MODECONTROLREG_BIT7BLINK); 388 | m_graphicsAdapter.enableVideo(true); 389 | 390 | } else if ((m_CGAModeReg & CGA_MODECONTROLREG_TEXT80) && (m_CGAModeReg & CGA_MODECONTROLREG_GRAPHICS) == 0) { 391 | 392 | // 80 column text mode 393 | //printf("CGA, 80 columns text mode\n"); 394 | m_frameBuffer = s_videoMemory + 0x8000 + m_CGAMemoryOffset; 395 | m_graphicsAdapter.setVideoBuffer(m_frameBuffer); 396 | m_graphicsAdapter.setEmulation(GraphicsAdapter::Emulation::PC_Text_80x25_16Colors); 397 | m_graphicsAdapter.setBit7Blink(m_CGAModeReg & CGA_MODECONTROLREG_BIT7BLINK); 398 | m_graphicsAdapter.enableVideo(true); 399 | 400 | } else if ((m_CGAModeReg & CGA_MODECONTROLREG_GRAPHICS) && (m_CGAModeReg & CGA_MODECONTROLREG_GRAPH640) == 0) { 401 | 402 | // 320x200 graphics 403 | //printf("CGA, 320x200 graphics mode\n"); 404 | m_frameBuffer = s_videoMemory + 0x8000 + m_CGAMemoryOffset; 405 | m_graphicsAdapter.setVideoBuffer(m_frameBuffer); 406 | m_graphicsAdapter.setEmulation(GraphicsAdapter::Emulation::PC_Graphics_320x200_4Colors); 407 | int paletteIndex = (bool)(m_CGAColorReg & CGA_COLORCONTROLREG_PALETTESEL) * 2 + (bool)(m_CGAColorReg & CGA_COLORCONTROLREG_HIGHINTENSITY); 408 | m_graphicsAdapter.setPCGraphicsPaletteInUse(paletteIndex); 409 | m_graphicsAdapter.setPCGraphicsBackgroundColorIndex(m_CGAColorReg & CGA_COLORCONTROLREG_BACKCOLR_MASK); 410 | m_graphicsAdapter.enableVideo(true); 411 | 412 | } else if ((m_CGAModeReg & CGA_MODECONTROLREG_GRAPHICS) && (m_CGAModeReg & CGA_MODECONTROLREG_GRAPH640)) { 413 | 414 | // 640x200 graphics 415 | //printf("CGA, 640x200 graphics mode\n"); 416 | m_frameBuffer = s_videoMemory + 0x8000 + m_CGAMemoryOffset; 417 | m_graphicsAdapter.setVideoBuffer(m_frameBuffer); 418 | m_graphicsAdapter.setEmulation(GraphicsAdapter::Emulation::PC_Graphics_640x200_2Colors); 419 | m_graphicsAdapter.setPCGraphicsForegroundColorIndex(m_CGAColorReg & CGA_COLORCONTROLREG_BACKCOLR_MASK); 420 | m_graphicsAdapter.enableVideo(true); 421 | 422 | } 423 | } 424 | 425 | 426 | void Machine::setHGC6845Register(uint8_t value) 427 | { 428 | m_HGC6845[m_HGC6845SelectRegister] = value; 429 | switch (m_HGC6845SelectRegister) { 430 | 431 | // cursor start: (bits 5,6 = cursor blink and visibility control), bits 0..4 cursor start scanline 432 | case 0x0a: 433 | m_graphicsAdapter.setCursorVisible((m_HGC6845[0xa] >> 5) >= 2); 434 | // cursor end: bits 0..4 cursor end scanline 435 | case 0x0b: 436 | m_graphicsAdapter.setCursorShape((m_HGC6845[0xa] & 0x1f), (m_HGC6845[0xb] & 0x1f)); 437 | break; 438 | 439 | // video memory start offset (0x0c = H, 0x0d = L) 440 | case 0x0c: 441 | case 0x0d: 442 | m_HGCMemoryOffset = ((m_HGC6845[0xc] << 8) | m_HGC6845[0xd]) << 1; 443 | setHGCMode(); 444 | break; 445 | 446 | // cursor position (0x0e = H and 0x0f = L) 447 | case 0x0e: 448 | case 0x0f: 449 | { 450 | int pos = (m_HGC6845[0xe] << 8) | m_HGC6845[0xf]; 451 | m_graphicsAdapter.setCursorPos(pos / m_graphicsAdapter.getTextColumns(), pos % m_graphicsAdapter.getTextColumns()); 452 | break; 453 | } 454 | 455 | } 456 | } 457 | 458 | 459 | void Machine::setHGCMode() 460 | { 461 | constexpr int HGC_OFFSET_PAGE0 = 0x0000; 462 | constexpr int HGC_OFFSET_PAGE1 = 0x8000; 463 | 464 | if ((m_HGCModeReg & HGC_MODECONTROLREG_ENABLED) == 0) { 465 | 466 | // video disabled 467 | //printf("Hercules, video disabled\n"); 468 | m_graphicsAdapter.enableVideo(false); 469 | 470 | } else if ((m_HGCModeReg & HGC_MODECONTROLREG_GRAPHICS) == 0 || (m_HGCSwitchReg & HGC_CONFSWITCH_ALLOWGRAPHICSMODE) == 0) { 471 | 472 | // text mode 473 | //printf("Hercules, text mode\n"); 474 | m_frameBuffer = s_videoMemory + HGC_OFFSET_PAGE0; 475 | m_graphicsAdapter.setVideoBuffer(m_frameBuffer); 476 | m_graphicsAdapter.setEmulation(GraphicsAdapter::Emulation::PC_Text_80x25_16Colors); 477 | m_graphicsAdapter.setBit7Blink(m_HGCModeReg & HGC_MODECONTROLREG_BIT7BLINK); 478 | m_graphicsAdapter.enableVideo(true); 479 | 480 | } else if ((m_HGCModeReg &HGC_MODECONTROLREG_GRAPHICS)) { 481 | 482 | // graphics mode 483 | //printf("Hercules, graphics mode\n"); 484 | int offset = (m_HGCModeReg & HGC_MODECONTROLREG_GRAPHICSPAGE) && (m_HGCSwitchReg & HGC_CONFSWITCH_ALLOWPAGE1) ? HGC_OFFSET_PAGE1 : HGC_OFFSET_PAGE0; 485 | m_frameBuffer = s_videoMemory + offset; 486 | m_graphicsAdapter.setVideoBuffer(m_frameBuffer); 487 | m_graphicsAdapter.setEmulation(GraphicsAdapter::Emulation::PC_Graphics_HGC_720x348); 488 | m_graphicsAdapter.enableVideo(true); 489 | 490 | } 491 | 492 | } 493 | 494 | 495 | void Machine::writePort(void * context, int address, uint8_t value) 496 | { 497 | auto m = (Machine*)context; 498 | 499 | switch (address) { 500 | 501 | // PIC8259A 502 | case 0x20: 503 | case 0x21: 504 | m->m_PIC8259A.write(address & 1, value); 505 | break; 506 | 507 | // PIC8259B 508 | case 0xa0: 509 | case 0xa1: 510 | m->m_PIC8259B.write(address & 1, value); 511 | break; 512 | 513 | // PIT8253 514 | case 0x0040: 515 | case 0x0041: 516 | case 0x0042: 517 | case 0x0043: 518 | m->m_PIT8253.write(address & 3, value); 519 | if ((address == 0x43 && (value >> 6) == 2) || address == 0x42) 520 | m->speakerSetFreq(); 521 | break; 522 | 523 | // 8042 keyboard controller input 524 | case 0x0060: 525 | m->m_i8042.write(0, value); 526 | break; 527 | 528 | // PortB 529 | // bit 1 : speaker data enable 530 | // bit 0 : timer 2 gate 531 | case 0x0061: 532 | m->m_speakerDataEnable = value & 0x02; 533 | m->m_PIT8253.setGate(2, value & 0x01); 534 | m->speakerEnableDisable(); 535 | break; 536 | 537 | // 8042 keyboard controller input 538 | case 0x0064: 539 | m->m_i8042.write(1, value); 540 | break; 541 | 542 | // MC146818 RTC & RAM 543 | case 0x0070: 544 | case 0x0071: 545 | m->m_MC146818.write(address & 1, value); 546 | break; 547 | 548 | // CGA - CRT 6845 - register selection register 549 | case 0x3d4: 550 | m->m_CGA6845SelectRegister = value; 551 | break; 552 | 553 | // CGA - CRT 6845 - selected register write 554 | case 0x3d5: 555 | m->setCGA6845Register(value); 556 | break; 557 | 558 | // CGA - Mode Control Register 559 | case 0x3d8: 560 | m->m_CGAModeReg = value; 561 | m->setCGAMode(); 562 | break; 563 | 564 | // CGA - Color Select register 565 | case 0x3d9: 566 | m->m_CGAColorReg = value; 567 | m->setCGAMode(); 568 | break; 569 | 570 | // Hercules (HGC) - CRT 6845 - register selection register 571 | case 0x3b4: 572 | m->m_HGC6845SelectRegister = value; 573 | break; 574 | 575 | // Hercules (HGC) - CRT 6845 - selected register write 576 | case 0x3b5: 577 | m->setHGC6845Register(value); 578 | break; 579 | 580 | // Hercules (HGC) - Display Mode Control Port 581 | case 0x3b8: 582 | m->m_HGCModeReg = value; 583 | m->setHGCMode(); 584 | break; 585 | 586 | // Hercules (HGC) - Configuration Switch 587 | case 0x3bf: 588 | m->m_HGCSwitchReg = value; 589 | m->setHGCMode(); 590 | break; 591 | 592 | // I/O expander - Configuration 593 | case EXTIO_CONFIG: 594 | m->m_MCP23S17.setINTActiveHigh(value & EXTIO_CONFIG_INT_POLARITY); 595 | break; 596 | 597 | // I/O expander - Port A/B Direction 598 | case EXTIO_DIRA ... EXTIO_DIRB: 599 | m->m_MCP23S17.setPortDir(address - EXTIO_DIRA + MCP_PORTA, ~value); 600 | printf("dir %d = %02X\n", address - EXTIO_DIRA + MCP_PORTA, ~value); 601 | break; 602 | 603 | // I/O expander - Port A/B pullup 604 | case EXTIO_PULLUPA ... EXTIO_PULLUPB: 605 | m->m_MCP23S17.enablePortPullUp(address - EXTIO_PULLUPA + MCP_PORTA, value); 606 | break; 607 | 608 | // I/O expander - Port A/B write 609 | case EXTIO_PORTA ... EXTIO_PORTB: 610 | m->m_MCP23S17.writePort(address - EXTIO_PORTA + MCP_PORTA, value); 611 | printf("set %d = %02X\n", address - EXTIO_PORTA + MCP_PORTA, value); 612 | break; 613 | 614 | // I/O expander - GPIO selection 615 | case EXTIO_GPIOSEL: 616 | m->m_MCP23S17Sel = value & 0xf; 617 | break; 618 | 619 | // I/O expander - GPIO direction and pullup 620 | case EXTIO_GPIOCONF: 621 | m->m_MCP23S17.configureGPIO(m->m_MCP23S17Sel, value & 1 ? fabgl::MCPDir::Output : fabgl::MCPDir::Input, value & 2); 622 | break; 623 | 624 | // I/O expander - GPIO write 625 | case EXTIO_GPIO: 626 | m->m_MCP23S17.writeGPIO(m->m_MCP23S17Sel, value); 627 | break; 628 | 629 | default: 630 | //printf("OUT %04x=%02x\n", address, value); 631 | break; 632 | } 633 | } 634 | 635 | 636 | uint8_t Machine::readPort(void * context, int address) 637 | { 638 | auto m = (Machine*)context; 639 | 640 | switch (address) { 641 | 642 | // PIC8259A 643 | case 0x0020: 644 | case 0x0021: 645 | return m->m_PIC8259A.read(address & 1); 646 | 647 | // PIC8259B 648 | case 0x00a0: 649 | case 0x00a1: 650 | return m->m_PIC8259B.read(address & 1); 651 | 652 | // PIT8253 653 | case 0x0040: 654 | case 0x0041: 655 | case 0x0042: 656 | case 0x0043: 657 | return m->m_PIT8253.read(address & 3); 658 | 659 | // 8042 keyboard controller output 660 | case 0x0060: 661 | return m->m_i8042.read(0); 662 | 663 | // Port B 664 | // bit 5 : timer 2 out 665 | // bit 4 : toggles every 15.085us (DMA refresh) 666 | // bit 1 : speaker data enable 667 | // bit 0 : timer 2 gate 668 | case 0x0061: 669 | return ((int)m->m_PIT8253.getOut(2) << 5) | // bit 5 670 | (esp_timer_get_time() & 0x10) | // bit 4 (toggles every 16us) 671 | ((int)m->m_speakerDataEnable << 1) | // bit 1 672 | ((int)m->m_PIT8253.getGate(2)); // bit 0 673 | 674 | // I/O port 675 | case 0x0062: 676 | return 0x20 * m->m_PIT8253.getOut(2); // bit 5 = timer 2 output 677 | 678 | // 8042 keyboard controller status register 679 | case 0x0064: 680 | return m->m_i8042.read(1); 681 | 682 | // MC146818 RTC & RAM 683 | case 0x0070: 684 | case 0x0071: 685 | return m->m_MC146818.read(address & 1); 686 | 687 | // CGA - CRT 6845 - register selection register 688 | case 0x3d4: 689 | return 0x00; // not readable 690 | 691 | // CGA - CRT 6845 - selected register read 692 | case 0x3d5: 693 | return m->m_CGA6845SelectRegister >= 14 && m->m_CGA6845SelectRegister < 16 ? m->m_CGA6845[m->m_CGA6845SelectRegister] : 0x00; 694 | 695 | // CGA - Color Select register 696 | // note: this register should be write-only, but some games do not work if it isn't readable 697 | case 0x3d9: 698 | return m->m_CGAColorReg; 699 | 700 | // CGA - Status Register 701 | // real vertical sync is too fast for our slowly emulated 8086, so 702 | // here it is just a fake, just to allow programs that check it to keep going anyway. 703 | case 0x3da: 704 | m->m_CGAVSyncQuery += 1; 705 | return (m->m_CGAVSyncQuery & 0x7) != 0 ? 0x09 : 0x00; // "not VSync" (0x00) every 7 queries 706 | 707 | // Hercules (HGC) - register selection register 708 | case 0x3b4: 709 | return 0x00; // not readable 710 | 711 | // Hercules (HGC) - selected register read 712 | case 0x3b5: 713 | return m->m_HGC6845SelectRegister >= 14 && m->m_HGC6845SelectRegister < 16 ? m->m_HGC6845[m->m_HGC6845SelectRegister] : 0x00; 714 | 715 | // Hercules (HGC) - Display Status Port 716 | // real vertical sync is too fast for our slowly emulated 8086, so 717 | // here it is just a fake, just to allow programs that check it to keep going anyway. 718 | case 0x3ba: 719 | m->m_HGCVSyncQuery += 1; 720 | return (m->m_HGCVSyncQuery & 0x7) != 0 ? 0x00 : 0x80; // "not VSync" (0x80) every 7 queries 721 | 722 | // I/O expander - Configuration 723 | case EXTIO_CONFIG: 724 | return (m->m_MCP23S17.available() ? EXTIO_CONFIG_AVAILABLE : 0) | 725 | (m->m_MCP23S17.getINTActiveHigh() ? EXTIO_CONFIG_INT_POLARITY : 0); 726 | 727 | // I/O expander - Port A/B Direction 728 | case EXTIO_DIRA ... EXTIO_DIRB: 729 | return m->m_MCP23S17.getPortDir(address - EXTIO_DIRA + MCP_PORTA); 730 | 731 | // I/O expander - Port A/B pullup 732 | case EXTIO_PULLUPA ... EXTIO_PULLUPB: 733 | return m->m_MCP23S17.getPortPullUp(address - EXTIO_PULLUPA + MCP_PORTA); 734 | 735 | // I/O expander - Port A/B read 736 | case EXTIO_PORTA ... EXTIO_PORTB: 737 | return m->m_MCP23S17.readPort(address - EXTIO_PORTA + MCP_PORTA); 738 | 739 | // I/O expander - GPIO selection 740 | case EXTIO_GPIOSEL: 741 | return m->m_MCP23S17Sel; 742 | 743 | // I/O expander - GPIO read 744 | case EXTIO_GPIO: 745 | return m->m_MCP23S17.readGPIO(m->m_MCP23S17Sel); 746 | 747 | } 748 | 749 | //printf("IN %04X\n", address); 750 | return 0xff; 751 | } 752 | 753 | 754 | void Machine::PITChangeOut(void * context, int timerIndex) 755 | { 756 | auto m = (Machine*)context; 757 | 758 | // timer 0 trigged? 759 | if (timerIndex == 0 && m->m_PIT8253.getOut(0) == true) { 760 | // yes, report 8259A-IR0 (IRQ0, INT 08h) 761 | m->m_PIC8259A.signalInterrupt(0); 762 | } 763 | } 764 | 765 | 766 | // reset from 8042 767 | bool Machine::resetMachine(void * context) 768 | { 769 | auto m = (Machine*)context; 770 | m->trigReset(); 771 | return true; 772 | } 773 | 774 | // SYSREQ (ALT + PRINTSCREEN) 775 | bool Machine::sysReq(void * context) 776 | { 777 | auto m = (Machine*)context; 778 | if (m->m_sysReqCallback) 779 | m->m_sysReqCallback(); 780 | return true; 781 | } 782 | 783 | 784 | // 8259A-IR1 (IRQ1, INT 09h) 785 | bool Machine::keyboardInterrupt(void * context) 786 | { 787 | auto m = (Machine*)context; 788 | return m->m_PIC8259A.signalInterrupt(1); 789 | } 790 | 791 | 792 | // 8259B-IR4 (IRQ12, INT 074h) 793 | bool Machine::mouseInterrupt(void * context) 794 | { 795 | auto m = (Machine*)context; 796 | return m->m_PIC8259B.signalInterrupt(4); 797 | } 798 | 799 | 800 | // interrupt from MC146818, trig 8259B-IR0 (IRQ8, INT 70h) 801 | bool Machine::MC146818Interrupt(void * context) 802 | { 803 | auto m = (Machine*)context; 804 | return m->m_PIC8259B.signalInterrupt(0); 805 | } 806 | 807 | 808 | void Machine::writeVideoMemory8(void * context, int address, uint8_t value) 809 | { 810 | //printf("WVMEM %05X <= %02X\n", address, value); 811 | if (address >= 0xb0000) 812 | s_videoMemory[address - 0xb0000] = value; 813 | } 814 | 815 | 816 | void Machine::writeVideoMemory16(void * context, int address, uint16_t value) 817 | { 818 | //printf("WVMEM %05X <= %04X\n", address, value); 819 | if (address >= 0xb0000) 820 | *(uint16_t*)(s_videoMemory + address - 0xb0000) = value; 821 | } 822 | 823 | 824 | uint8_t Machine::readVideoMemory8(void * context, int address) 825 | { 826 | if (address >= 0xb0000) 827 | return s_videoMemory[address - 0xb0000]; 828 | else 829 | return 0xff; 830 | } 831 | 832 | 833 | uint16_t Machine::readVideoMemory16(void * context, int address) 834 | { 835 | if (address >= 0xb0000) 836 | return *(uint16_t*)(s_videoMemory + address - 0xb0000); 837 | else 838 | return 0xffff; 839 | } 840 | 841 | 842 | bool Machine::interrupt(void * context, int num) 843 | { 844 | auto m = (Machine*)context; 845 | 846 | 847 | // emu interrupts callable only inside the BIOS segment 848 | if (i8086::CS() == BIOS_SEG) { 849 | switch (num) { 850 | 851 | // Put Char for debug (AL) 852 | case 0xf4: 853 | printf("%c", i8086::AX() & 0xff); 854 | return true; 855 | 856 | // BIOS helpers (AH = select helper function) 857 | case 0xf5: 858 | m->m_BIOS.helpersEntry(); 859 | return true; 860 | 861 | // set or reset flag CF before IRET, replacing value in stack with current value 862 | case 0xf6: 863 | { 864 | auto savedFlags = (uint16_t*) (s_memory + i8086::SS() * 16 + (uint16_t)(i8086::SP() + 4)); 865 | *savedFlags = (*savedFlags & 0xfffe) | i8086::flagCF(); 866 | return true; 867 | } 868 | 869 | // set or reset flag ZF before IRET, replacing value in stack with current value 870 | case 0xf7: 871 | { 872 | auto savedFlags = (uint16_t*) (s_memory + i8086::SS() * 16 + (uint16_t)(i8086::SP() + 4)); 873 | *savedFlags = (*savedFlags & 0xffbf) | (i8086::flagZF() << 6); 874 | return true; 875 | } 876 | 877 | // set or reset flag IF before IRET, replacing value in stack with current value 878 | case 0xf8: 879 | { 880 | auto savedFlags = (uint16_t*) (s_memory + i8086::SS() * 16 + (uint16_t)(i8086::SP() + 4)); 881 | *savedFlags = (*savedFlags & 0xfdff) | (i8086::flagIF() << 9); 882 | return true; 883 | } 884 | 885 | // test point P0 886 | case 0xf9: 887 | printf("P0 AX=%04X BX=%04X CX=%04X DX=%04X DS=%04X\n", i8086::AX(), i8086::BX(), i8086::CX(), i8086::DX(), i8086::DS()); 888 | return true; 889 | 890 | // test point P1 891 | case 0xfa: 892 | printf("P1 AX=%04X BX=%04X CX=%04X DX=%04X DS=%04X\n", i8086::AX(), i8086::BX(), i8086::CX(), i8086::DX(), i8086::DS()); 893 | return true; 894 | 895 | // BIOS disk handler (INT 13h) 896 | case 0xfb: 897 | m->m_BIOS.diskHandlerEntry(); 898 | return true; 899 | 900 | // BIOS video handler (INT 10h) 901 | case 0xfc: 902 | m->m_BIOS.videoHandlerEntry(); 903 | return true; 904 | 905 | } 906 | } 907 | 908 | // not hanlded 909 | return false; 910 | } 911 | 912 | 913 | void Machine::speakerSetFreq() 914 | { 915 | //printf("speakerSetFreq: count = %d\n", m_PIT8253.timerInfo(2).resetCount); 916 | int timerCount = m_PIT8253.timerInfo(2).resetCount; 917 | if (timerCount == 0) 918 | timerCount = 65536; 919 | int freq = PIT_TICK_FREQ / timerCount; 920 | //printf(" freq = %dHz\n", freq); 921 | m_sinWaveGen.setFrequency(freq); 922 | } 923 | 924 | 925 | void Machine::speakerEnableDisable() 926 | { 927 | bool genEnabled = m_PIT8253.getGate(2); 928 | if (genEnabled && m_speakerDataEnable) { 929 | // speaker enabled 930 | m_sinWaveGen.enable(true); 931 | } else { 932 | // speaker disabled 933 | m_sinWaveGen.enable(false); 934 | } 935 | } 936 | 937 | 938 | void Machine::dumpMemory(char const * filename) 939 | { 940 | constexpr int BLOCKLEN = 1024; 941 | auto file = FileBrowser(m_baseDir).openFile(filename, "wb"); 942 | if (file) { 943 | for (int i = 0; i < 1048576; i += BLOCKLEN) 944 | fwrite(s_memory + i, 1, BLOCKLEN, file); 945 | fclose(file); 946 | } 947 | } 948 | 949 | 950 | void Machine::dumpInfo(char const * filename) 951 | { 952 | auto file = FileBrowser(m_baseDir).openFile(filename, "wb"); 953 | if (file) { 954 | // CPU state 955 | fprintf(file, " CS DS ES SS\n"); 956 | fprintf(file, "%04X %04X %04X %04X\n\n", i8086::CS(), i8086::DS(), i8086::ES(), i8086::SS()); 957 | fprintf(file, " IP AX BX CX DX SI DI BP SP\n"); 958 | fprintf(file, "%04X %04X %04X %04X %04X %04X %04X %04X %04X\n\n", i8086::IP(), i8086::AX(), i8086::BX(), i8086::CX(), i8086::DX(), i8086::SI(), i8086::DI(), i8086::BP(), i8086::SP()); 959 | fprintf(file, "O D I T S Z A P C\n"); 960 | fprintf(file, "%d %d %d %d %d %d %d %d %d\n\n", i8086::flagOF(), i8086::flagDF(), i8086::flagIF(), i8086::flagTF(), i8086::flagSF(), i8086::flagZF(), i8086::flagAF(), i8086::flagPF(), i8086::flagCF()); 961 | fprintf(file, "CS+IP: %05X\n", i8086::CS() * 16 + i8086::IP()); 962 | fprintf(file, "SS+SP: %05X\n\n", i8086::SS() * 16 + i8086::SP()); 963 | fclose(file); 964 | } 965 | } 966 | -------------------------------------------------------------------------------- /machine.h: -------------------------------------------------------------------------------- 1 | /* 2 | Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - 3 | Copyright (c) 2019-2022 Fabrizio Di Vittorio. 4 | All rights reserved. 5 | 6 | 7 | * Please contact fdivitto2013@gmail.com if you need a commercial license. 8 | 9 | 10 | * This library and related software is available under GPL v3. 11 | 12 | FabGL is free software: you can redistribute it and/or modify 13 | it under the terms of the GNU General Public License as published by 14 | the Free Software Foundation, either version 3 of the License, or 15 | (at your option) any later version. 16 | 17 | FabGL is distributed in the hope that it will be useful, 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 | GNU General Public License for more details. 21 | 22 | You should have received a copy of the GNU General Public License 23 | along with FabGL. If not, see . 24 | */ 25 | 26 | 27 | #pragma once 28 | 29 | 30 | #include "fabgl.h" 31 | #include "emudevs/graphicsadapter.h" 32 | #include "emudevs/i8086.h" 33 | #include "emudevs/PIC8259.h" 34 | #include "emudevs/PIT8253.h" 35 | #include "emudevs/i8042.h" 36 | #include "emudevs/MC146818.h" 37 | #include "devdrivers/MCP23S17.h" 38 | 39 | #include "bios.h" 40 | 41 | 42 | #define RAM_SIZE 1048576 // must correspond to bios MEMSIZE 43 | #define VIDEOMEMSIZE 65536 44 | 45 | 46 | 47 | using fabgl::GraphicsAdapter; 48 | using fabgl::PIC8259; 49 | using fabgl::PIT8253; 50 | using fabgl::i8042; 51 | using fabgl::MC146818; 52 | using fabgl::MCP23S17; 53 | 54 | 55 | #ifdef FABGL_EMULATED 56 | typedef void (*StepCallback)(void *); 57 | #endif 58 | 59 | 60 | typedef void (*SysReqCallback)(); 61 | 62 | 63 | 64 | class Machine { 65 | 66 | public: 67 | Machine(); 68 | ~Machine(); 69 | 70 | void setBaseDirectory(char const * value) { m_baseDir = value; } 71 | 72 | void setDriveImage(int drive, char const * filename, int cylinders = 0, int heads = 0, int sectors = 0); 73 | 74 | void setBootDrive(int drive) { m_bootDrive = drive; } 75 | 76 | void setSysReqCallback(SysReqCallback value) { m_sysReqCallback = value; } 77 | 78 | void run(); 79 | 80 | void trigReset() { m_reset = true; } 81 | 82 | uint32_t ticksCounter() { return m_ticksCounter; } 83 | 84 | i8042 * getI8042() { return &m_i8042; } 85 | 86 | MC146818 * getMC146818() { return &m_MC146818; } 87 | 88 | uint8_t * memory() { return s_memory; } 89 | 90 | uint8_t * videoMemory() { return s_videoMemory; } 91 | 92 | uint8_t * frameBuffer() { return m_frameBuffer; } 93 | 94 | GraphicsAdapter * graphicsAdapter() { return &m_graphicsAdapter; } 95 | 96 | FILE * disk(int index) { return m_disk[index]; } 97 | char const * diskFilename(int index) { return m_diskFilename[index]; } 98 | uint64_t diskSize(int index) { return m_diskSize[index]; } 99 | uint16_t diskCylinders(int index) { return m_diskCylinders[index]; } 100 | uint8_t diskHeads(int index) { return m_diskHeads[index]; } 101 | uint8_t diskSectors(int index) { return m_diskSectors[index]; } 102 | 103 | void dumpMemory(char const * filename); 104 | void dumpInfo(char const * filename); 105 | 106 | #ifdef FABGL_EMULATED 107 | void setStepCallback(StepCallback value) { m_stepCallback = value; } 108 | #endif 109 | 110 | private: 111 | 112 | 113 | static void runTask(void * pvParameters); 114 | 115 | void init(); 116 | void reset(); 117 | 118 | void tick(); 119 | 120 | void setCGAMode(); 121 | void setCGA6845Register(uint8_t value); 122 | 123 | void setHGCMode(); 124 | void setHGC6845Register(uint8_t value); 125 | 126 | static void writePort(void * context, int address, uint8_t value); 127 | static uint8_t readPort(void * context, int address); 128 | 129 | static void writeVideoMemory8(void * context, int address, uint8_t value); 130 | static void writeVideoMemory16(void * context, int address, uint16_t value); 131 | static uint8_t readVideoMemory8(void * context, int address); 132 | static uint16_t readVideoMemory16(void * context, int address); 133 | 134 | static bool interrupt(void * context, int num); 135 | 136 | static void PITChangeOut(void * context, int timerIndex); 137 | 138 | static bool MC146818Interrupt(void * context); 139 | 140 | static bool keyboardInterrupt(void * context); 141 | static bool mouseInterrupt(void * context); 142 | static bool resetMachine(void * context); 143 | static bool sysReq(void * context); 144 | 145 | void speakerSetFreq(); 146 | void speakerEnableDisable(); 147 | 148 | void autoDetectDriveGeometry(int drive); 149 | 150 | 151 | #ifdef FABGL_EMULATED 152 | StepCallback m_stepCallback; 153 | #endif 154 | 155 | bool m_reset; 156 | 157 | GraphicsAdapter m_graphicsAdapter; 158 | 159 | BIOS m_BIOS; 160 | 161 | // 0, 1 = floppy 162 | // >= 2 = hard disk 163 | char * m_diskFilename[DISKCOUNT]; 164 | FILE * m_disk[DISKCOUNT]; 165 | uint64_t m_diskSize[DISKCOUNT]; 166 | uint16_t m_diskCylinders[DISKCOUNT]; 167 | uint8_t m_diskHeads[DISKCOUNT]; 168 | uint8_t m_diskSectors[DISKCOUNT]; 169 | 170 | static uint8_t * s_memory; 171 | static uint8_t * s_videoMemory; 172 | uint8_t * m_frameBuffer; 173 | 174 | // 8259 Programmable Interrupt Controllers 175 | PIC8259 m_PIC8259A; // master 176 | PIC8259 m_PIC8259B; // slave 177 | 178 | // 8253 Programmable Interval Timers 179 | // pin connections of PIT8253 on the IBM XT: 180 | // gate-0 = gate-1 = +5V 181 | // gate-2 = TIM2GATESPK 182 | // clk-0 = clk-1 = clk-2 = 1193182 Hz 183 | // out-0 = IRQ0 184 | // out-1 = RAM refresh 185 | // out-2 = speaker 186 | PIT8253 m_PIT8253; 187 | 188 | // 8042 PS/2 Keyboard Controller 189 | i8042 m_i8042; 190 | 191 | TaskHandle_t m_taskHandle; 192 | 193 | uint32_t m_ticksCounter; 194 | 195 | // CGA 196 | uint8_t m_CGA6845SelectRegister; 197 | uint8_t m_CGA6845[18]; 198 | uint16_t m_CGAMemoryOffset; 199 | uint8_t m_CGAModeReg; 200 | uint8_t m_CGAColorReg; 201 | uint16_t m_CGAVSyncQuery; 202 | 203 | // Hercules 204 | uint8_t m_HGC6845SelectRegister; 205 | uint8_t m_HGC6845[18]; 206 | uint16_t m_HGCMemoryOffset; 207 | uint8_t m_HGCModeReg; 208 | uint8_t m_HGCSwitchReg; 209 | uint16_t m_HGCVSyncQuery; 210 | 211 | // speaker/audio 212 | bool m_speakerDataEnable; 213 | SoundGenerator m_soundGen; 214 | SineWaveformGenerator m_sinWaveGen; 215 | 216 | // CMOS & RTC 217 | MC146818 m_MC146818; 218 | 219 | // extended I/O (MCP23S17) 220 | MCP23S17 m_MCP23S17; 221 | uint8_t m_MCP23S17Sel; 222 | 223 | uint8_t m_bootDrive; 224 | 225 | SysReqCallback m_sysReqCallback; 226 | 227 | char const * m_baseDir; 228 | 229 | }; 230 | -------------------------------------------------------------------------------- /mconf.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - 3 | Copyright (c) 2019-2022 Fabrizio Di Vittorio. 4 | All rights reserved. 5 | 6 | 7 | * Please contact fdivitto2013@gmail.com if you need a commercial license. 8 | 9 | 10 | * This library and related software is available under GPL v3. 11 | 12 | FabGL is free software: you can redistribute it and/or modify 13 | it under the terms of the GNU General Public License as published by 14 | the Free Software Foundation, either version 3 of the License, or 15 | (at your option) any later version. 16 | 17 | FabGL is distributed in the hope that it will be useful, 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 | GNU General Public License for more details. 21 | 22 | You should have received a copy of the GNU General Public License 23 | along with FabGL. If not, see . 24 | */ 25 | 26 | 27 | #include 28 | 29 | #include "fabgl.h" 30 | #include "fabui.h" 31 | #include "fabutils.h" 32 | 33 | 34 | #include "mconf.h" 35 | 36 | 37 | using std::unique_ptr; 38 | using fabgl::imin; 39 | 40 | 41 | 42 | 43 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 44 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 45 | // MachineConf 46 | 47 | 48 | #define MAXTAGLENGTH 6 49 | #define MAXVALUELENGTH 256 50 | 51 | 52 | MachineConf::MachineConf() 53 | : m_itemsList(nullptr) 54 | { 55 | } 56 | 57 | 58 | MachineConf::~MachineConf() 59 | { 60 | cleanUp(); 61 | } 62 | 63 | 64 | void MachineConf::cleanUp() 65 | { 66 | while (deleteItem(0)) 67 | ; 68 | } 69 | 70 | 71 | bool MachineConf::deleteItem(int index) 72 | { 73 | MachineConfItem * item = m_itemsList; 74 | MachineConfItem * prev = nullptr; 75 | while (item && --index > -1) { 76 | prev = item; 77 | item = item->next; 78 | } 79 | if (item) { 80 | if (prev) 81 | prev->next = item->next; 82 | else 83 | m_itemsList = item->next; 84 | delete item; 85 | } 86 | return item != nullptr; 87 | } 88 | 89 | 90 | MachineConfItem * MachineConf::getItem(int index) 91 | { 92 | auto item = m_itemsList; 93 | while (item && --index > -1) 94 | item = item->next; 95 | return item; 96 | } 97 | 98 | 99 | void MachineConf::addItem(MachineConfItem * item) 100 | { 101 | if (item->isValid()) { 102 | if (m_itemsList) { 103 | auto prev = m_itemsList; 104 | while (prev->next) 105 | prev = prev->next; 106 | prev->next = item; 107 | } else 108 | m_itemsList = item; 109 | } else 110 | delete item; 111 | } 112 | 113 | 114 | // insertingPoint = -1, append 115 | // insertingPoint = 0, insert before first 116 | // insertingPoint > 0, insert before insertingPoint 117 | void MachineConf::insertItem(int insertingPoint, MachineConfItem * item) 118 | { 119 | if (insertingPoint == 0) { 120 | item->next = m_itemsList; 121 | m_itemsList = item; 122 | } else if (insertingPoint < 0) { 123 | addItem(item); 124 | } else { 125 | auto prev = getItem(insertingPoint - 1); 126 | item->next = prev->next; 127 | prev->next = item; 128 | } 129 | } 130 | 131 | 132 | void MachineConf::loadFromFile(FILE * file) 133 | { 134 | cleanUp(); 135 | auto item = new MachineConfItem; 136 | char * value = (char*) SOC_EXTRAM_DATA_LOW; // use PSRAM as buffer 137 | char * tag = (char*) SOC_EXTRAM_DATA_LOW + MAXVALUELENGTH + 1; 138 | int ipos; 139 | char c = fgetc(file); 140 | while (!feof(file)) { 141 | while (!feof(file) && (isspace(c) || iscntrl(c))) { 142 | if (c == 0x0a) { 143 | // new line 144 | addItem(item); 145 | item = new MachineConfItem; 146 | } 147 | c = fgetc(file); 148 | } 149 | // get tag 150 | ipos = 0; 151 | while (!feof(file) && !isspace(c)) { 152 | if (ipos < MAXTAGLENGTH) 153 | tag[ipos++] = c; 154 | c = fgetc(file); 155 | } 156 | tag[ipos] = 0; 157 | // bypass spaces 158 | while (!feof(file) && isspace(c)) 159 | c = fgetc(file); 160 | // get tag value 161 | ipos = 0; 162 | bool quote = false; 163 | while (!feof(file) && (quote || !isspace(c))) { 164 | if (c == '"') 165 | quote = !quote; 166 | else if (ipos < MAXVALUELENGTH) 167 | value[ipos++] = c; 168 | c = fgetc(file); 169 | } 170 | value[ipos] = 0; 171 | // assign tag 172 | if (strcmp("desc", tag) == 0) 173 | item->setDesc(value); 174 | else if (strcmp("dska", tag) == 0 || strcmp("fd0", tag) == 0) 175 | item->setDisk(0, value); 176 | else if (strcmp("dskb", tag) == 0 || strcmp("fd1", tag) == 0) 177 | item->setDisk(1, value); 178 | else if (strcmp("dskc", tag) == 0 || strcmp("hd0", tag) == 0) 179 | item->setDisk(2, value); 180 | else if (strcmp("dskd", tag) == 0 || strcmp("hd1", tag) == 0) 181 | item->setDisk(3, value); 182 | else if (strcmp("chs0", tag) == 0) 183 | item->setCHS(2, value); 184 | else if (strcmp("chs1", tag) == 0) 185 | item->setCHS(3, value); 186 | else if (strcmp("boot", tag) == 0) 187 | item->setBootDrive(value); 188 | } 189 | addItem(item); 190 | } 191 | 192 | 193 | void MachineConf::saveToFile(FILE * file) 194 | { 195 | for (auto item = m_itemsList; item; item = item->next) { 196 | fputs("desc \"", file); 197 | fputs(item->desc, file); 198 | fputs("\" ", file); 199 | for (int d = 0; d < DISKCOUNT; ++d) 200 | if (item->disk[d] && strlen(item->disk[d]) > 0) { 201 | fputs(MachineConfItem::driveIndexToStr(d), file); 202 | fputs(" \"", file); 203 | fputs(item->disk[d], file); 204 | fputs("\" ", file); 205 | } 206 | for (int hd = 2; hd < 4; ++hd) 207 | if (item->cylinders[hd] > 0 && item->heads[hd] > 0 && item->sectors[hd] > 0) 208 | fprintf(file, "chs%d %hu,%hu,%hu ", hd - 2, item->cylinders[hd], item->heads[hd], item->sectors[hd]); 209 | if (item->bootDrive > 0) 210 | fprintf(file, "boot %s ", MachineConfItem::driveIndexToStr(item->bootDrive)); 211 | fputs("\r\n", file); 212 | } 213 | } 214 | 215 | 216 | 217 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 218 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 219 | // ConfigDialog 220 | 221 | 222 | struct ConfigDialog : public uiApp { 223 | 224 | MachineConf * mconf; 225 | MachineConfItem * item; 226 | 227 | RGB888 backgroundColor; 228 | 229 | uiFrame * mainFrame; 230 | uiButton * saveButton; 231 | uiButton * cancelButton; 232 | uiButton * createImageButton; 233 | uiTextEdit * descEdit; 234 | uiTextEdit * FD0PathEdit; 235 | uiTextEdit * FD1PathEdit; 236 | uiTextEdit * HD0PathEdit, * HD0CylEdit, * HD0HdsEdit, * HD0SecEdit; 237 | uiTextEdit * HD1PathEdit, * HD1CylEdit, * HD1HdsEdit, * HD1SecEdit; 238 | uiButton * browseFD0Button; 239 | uiButton * browseFD1Button; 240 | uiButton * browseHD0Button; 241 | uiButton * browseHD1Button; 242 | uiComboBox * bootDriveComboBox; 243 | 244 | 245 | void init() { 246 | rootWindow()->frameStyle().backgroundColor = backgroundColor; 247 | 248 | rootWindow()->onPaint = [&]() { drawInfo(canvas()); }; 249 | 250 | mainFrame = new uiFrame(rootWindow(), "Machine Configuration", UIWINDOW_PARENTCENTER, Size(460, 250)); 251 | mainFrame->frameProps().resizeable = false; 252 | mainFrame->frameProps().hasMaximizeButton = false; 253 | mainFrame->frameProps().hasMinimizeButton = false; 254 | mainFrame->frameProps().hasCloseButton = false; 255 | mainFrame->onKeyUp = [&](uiKeyEventInfo const & key) { 256 | if (key.VK == VirtualKey::VK_RETURN || key.VK == VirtualKey::VK_KP_ENTER) { 257 | saveAndQuit(); 258 | } else if (key.VK == VirtualKey::VK_ESCAPE) { 259 | justQuit(); 260 | } 261 | }; 262 | 263 | int x = 6; 264 | int y = 24; 265 | constexpr int oy = 3; 266 | constexpr int hh = 20; 267 | constexpr int dy = hh + 9; 268 | 269 | // description 270 | new uiStaticLabel(mainFrame, "Description", Point(x, y + oy)); 271 | descEdit = new uiTextEdit(mainFrame, item->desc, Point(70, y), Size(270, hh)); 272 | 273 | y += dy; 274 | 275 | // floppy 0 276 | new uiStaticLabel(mainFrame, "Floppy 0", Point(x, y + oy)); 277 | FD0PathEdit = new uiTextEdit(mainFrame, item->disk[0], Point(60, y), Size(260, hh)); 278 | browseFD0Button = new uiButton(mainFrame, "...", Point(322, y), Size(20, hh)); 279 | browseFD0Button->onClick = [&]() { browseFilename(FD0PathEdit); }; 280 | 281 | 282 | y += dy; 283 | 284 | // floppy 1 285 | new uiStaticLabel(mainFrame, "Floppy 1", Point(x, y + oy)); 286 | FD1PathEdit = new uiTextEdit(mainFrame, item->disk[1], Point(60, y), Size(260, hh)); 287 | browseFD1Button = new uiButton(mainFrame, "...", Point(322, y), Size(20, hh)); 288 | browseFD1Button->onClick = [&]() { browseFilename(FD1PathEdit); }; 289 | 290 | y += dy; 291 | 292 | // HDD 0 293 | new uiStaticLabel(mainFrame, "HDD 0", Point(x, y + oy)); 294 | HD0PathEdit = new uiTextEdit(mainFrame, item->disk[2], Point(60, y), Size(260, hh)); 295 | browseHD0Button = new uiButton(mainFrame, "...", Point(322, y), Size(20, hh)); 296 | browseHD0Button->onClick = [&]() { browseFilename(HD0PathEdit); }; 297 | new uiStaticLabel(mainFrame, "Cyls", Point(350, y - 13)); 298 | HD0CylEdit = new uiTextEdit(mainFrame, "", Point(350, y), Size(34, hh)); 299 | HD0CylEdit->setTextFmt("%hu", item->cylinders[2]); 300 | new uiStaticLabel(mainFrame, "Head", Point(385, y - 13)); 301 | HD0HdsEdit = new uiTextEdit(mainFrame, "", Point(385, y), Size(34, hh)); 302 | HD0HdsEdit->setTextFmt("%hu", item->heads[2]); 303 | new uiStaticLabel(mainFrame, "Sect", Point(420, y - 13)); 304 | HD0SecEdit = new uiTextEdit(mainFrame, "", Point(420, y), Size(34, hh)); 305 | HD0SecEdit->setTextFmt("%hu", item->sectors[2]); 306 | 307 | y += dy; 308 | 309 | // HDD 1 310 | new uiStaticLabel(mainFrame, "HDD 1", Point(x, y + oy)); 311 | HD1PathEdit = new uiTextEdit(mainFrame, item->disk[3], Point(60, y), Size(260, hh)); 312 | browseHD1Button = new uiButton(mainFrame, "...", Point(322, y), Size(20, hh)); 313 | browseHD1Button->onClick = [&]() { browseFilename(HD1PathEdit); }; 314 | HD1CylEdit = new uiTextEdit(mainFrame, "", Point(350, y), Size(34, hh)); 315 | HD1CylEdit->setTextFmt("%hu", item->cylinders[3]); 316 | HD1HdsEdit = new uiTextEdit(mainFrame, "", Point(385, y), Size(34, hh)); 317 | HD1HdsEdit->setTextFmt("%hu", item->heads[3]); 318 | HD1SecEdit = new uiTextEdit(mainFrame, "", Point(420, y), Size(34, hh)); 319 | HD1SecEdit->setTextFmt("%hu", item->sectors[3]); 320 | 321 | y += dy; 322 | 323 | // boot drive selection 324 | new uiStaticLabel(mainFrame, "Boot Drive", Point(x, y + oy)); 325 | bootDriveComboBox = new uiComboBox(mainFrame, Point(60, y), Size(60, hh), 50); 326 | bootDriveComboBox->items().append("Floppy 0"); 327 | bootDriveComboBox->items().append("Floppy 1"); 328 | bootDriveComboBox->items().append("HDD 0"); 329 | bootDriveComboBox->items().append("HDD 1"); 330 | bootDriveComboBox->selectItem(item->bootDrive); 331 | 332 | // bottom buttons 333 | 334 | y = mainFrame->clientSize().height - 8; 335 | 336 | // Save Button 337 | saveButton = new uiButton(mainFrame, "Save", Point(mainFrame->clientSize().width - 75, y), Size(70, hh)); 338 | saveButton->onClick = [&]() { 339 | saveAndQuit(); 340 | }; 341 | 342 | // Cancel Button 343 | cancelButton = new uiButton(mainFrame, "Cancel", Point(mainFrame->clientSize().width - 155, y), Size(70, hh)); 344 | cancelButton->onClick = [&]() { 345 | justQuit(); 346 | }; 347 | 348 | // Create Disk Image Button 349 | createImageButton = new uiButton(mainFrame, "Create Disk", Point(10, y), Size(90, hh)); 350 | createImageButton->onClick = [&]() { 351 | createDiskImage(); 352 | }; 353 | 354 | setActiveWindow(mainFrame); 355 | } 356 | 357 | 358 | void browseFilename(uiTextEdit * edit) { 359 | unique_ptr dir(new char[MAXVALUELENGTH + 1] { '/', 'S', 'D', 0 } ); 360 | unique_ptr filename(new char[MAXVALUELENGTH + 1]); 361 | strcpy(filename.get(), edit->text()); 362 | // is URL? 363 | if (strncmp("://", filename.get() + 4, 3)) { 364 | // no, does filename contain a path? 365 | auto p = strrchr(filename.get(), '/'); 366 | if (p) { 367 | // yes, move it into "dir" 368 | strcat(dir.get(), "/"); 369 | strncat(dir.get(), filename.get(), p - filename.get()); 370 | memmove(filename.get(), p + 1, strlen(p + 1) + 1); 371 | } 372 | } 373 | if (fileDialog("Select drive image", dir.get(), MAXVALUELENGTH, filename.get(), MAXVALUELENGTH, "OK", "Cancel") == uiMessageBoxResult::ButtonOK) { 374 | if (strlen(dir.get()) > 4) 375 | edit->setTextFmt("%s/%s", dir.get() + 4, filename.get()); // bypass "/SD/" 376 | else 377 | edit->setText(filename.get()); 378 | edit->repaint(); 379 | } 380 | } 381 | 382 | 383 | void saveAndQuit() { 384 | // get fields 385 | item->setDesc(descEdit->text()); 386 | item->setDisk(0, FD0PathEdit->text()); 387 | item->setDisk(1, FD1PathEdit->text()); 388 | item->setDisk(2, HD0PathEdit->text()); 389 | item->setDisk(3, HD1PathEdit->text()); 390 | item->cylinders[2] = atoi(HD0CylEdit->text()); 391 | item->heads[2] = atoi(HD0HdsEdit->text()); 392 | item->sectors[2] = atoi(HD0SecEdit->text()); 393 | item->cylinders[3] = atoi(HD1CylEdit->text()); 394 | item->heads[3] = atoi(HD1HdsEdit->text()); 395 | item->sectors[3] = atoi(HD1SecEdit->text()); 396 | item->bootDrive = bootDriveComboBox->selectedItem(); 397 | 398 | // save to file 399 | saveMachineConfiguration(mconf); 400 | 401 | justQuit(); 402 | } 403 | 404 | 405 | void justQuit() { 406 | rootWindow()->frameProps().fillBackground = false; 407 | quit(0); 408 | } 409 | 410 | 411 | void createDiskImage() { 412 | InputBox ib(this); 413 | 414 | int s = ib.menu("Create Disk Image", "Select Disk Size", "Floppy 320K (FAT12);" // 0 415 | "Floppy 360K (FAT12);" // 1 416 | "Floppy 720K (FAT12);" // 2 417 | "Floppy 1.2M (FAT12);" // 3 418 | "Floppy 1.44M (FAT12);" // 4 419 | "Floppy 2.88M (FAT12);" // 5 420 | "Hard Disk (Unformatted)"); // 6 421 | int hdSize = 0; 422 | if (s == 6) { 423 | // set hard disk size 424 | char str[4] = "10"; 425 | if (ib.textInput("Hard Disk Size", "Specify Hard Disk size in Megabytes", str, 3) == InputResult::Enter) 426 | hdSize = atoi(str); 427 | else 428 | return; 429 | if (hdSize <= 0 || hdSize > 512) { 430 | ib.message("Error", "Invalid Hard Disk Size!"); 431 | return; 432 | } 433 | } else if (s < 0 || s > 6) 434 | return; 435 | 436 | // set filename 437 | unique_ptr dir(new char[MAXVALUELENGTH + 1] { '/', 'S', 'D', 0 } ); 438 | unique_ptr filename(new char[MAXVALUELENGTH + 1] { 'n', 'e', 'w', 'i', 'm', 'a', 'g', 'e', '.', 'i', 'm', 'g', 0 }); 439 | if (fileDialog("Image Filename", dir.get(), MAXVALUELENGTH, filename.get(), MAXVALUELENGTH, "OK", "Cancel") != uiMessageBoxResult::ButtonOK) 440 | return; 441 | 442 | // create the image 443 | if (s == 6) { 444 | // Hard Disk 445 | ib.progressBox("", "Abort", true, 380, [&](fabgl::ProgressForm * form) { 446 | auto buf = (uint8_t*) SOC_EXTRAM_DATA_LOW; // use PSRAM as buffer 447 | constexpr int BUFSIZE = 4096; 448 | memset(buf, 0, BUFSIZE); 449 | auto file = FileBrowser(dir.get()).openFile(filename.get(), "wb"); 450 | const int totSize = hdSize * 1048576; 451 | for (int sz = totSize; sz > 0; ) { 452 | sz -= fwrite(buf, 1, imin(BUFSIZE, sz), file); 453 | if (!form->update((int)((double)(totSize - sz) / totSize * 100), "Writing %s (%d / %d bytes)", filename.get(), (totSize - sz), totSize)) 454 | break; 455 | } 456 | fclose(file); 457 | }); 458 | } else { 459 | // FAT Formatted Floppy Disk 460 | createFATFloppyImage(&ib, s, dir.get(), filename.get()); 461 | } 462 | 463 | } 464 | 465 | }; 466 | 467 | 468 | 469 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 470 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 471 | // helpers 472 | 473 | 474 | void loadMachineConfiguration(MachineConf * mconf) 475 | { 476 | FileBrowser fb(SD_MOUNT_PATH); 477 | 478 | // saves a default configuration file if necessary 479 | if (!fb.exists(MACHINE_CONF_FILENAME, false)) { 480 | auto confFile = fb.openFile(MACHINE_CONF_FILENAME, "wb"); 481 | fwrite(DefaultConfFile, 1, sizeof(DefaultConfFile), confFile); 482 | fclose(confFile); 483 | } 484 | 485 | // load 486 | auto confFile = fb.openFile(MACHINE_CONF_FILENAME, "rb"); 487 | mconf->loadFromFile(confFile); 488 | fclose(confFile); 489 | } 490 | 491 | 492 | void saveMachineConfiguration(MachineConf * mconf) 493 | { 494 | auto confFile = FileBrowser(SD_MOUNT_PATH).openFile(MACHINE_CONF_FILENAME, "wb"); 495 | mconf->saveToFile(confFile); 496 | fclose(confFile); 497 | } 498 | 499 | 500 | void editConfigDialog(InputBox * ibox, MachineConf * mconf, int idx) 501 | { 502 | ConfigDialog app; 503 | app.mconf = mconf; 504 | app.item = mconf->getItem(idx); 505 | app.backgroundColor = ibox->backgroundColor(); 506 | app.run(ibox->getDisplayController()); 507 | } 508 | 509 | 510 | void newConfigDialog(InputBox * ibox, MachineConf * mconf, int idx) 511 | { 512 | auto newItem = new MachineConfItem; 513 | newItem->setDesc("New Configuration"); 514 | mconf->insertItem(idx, newItem); 515 | 516 | ConfigDialog app; 517 | app.mconf = mconf; 518 | app.item = newItem; 519 | app.backgroundColor = ibox->backgroundColor(); 520 | app.run(ibox->getDisplayController()); 521 | } 522 | 523 | 524 | void delConfigDialog(InputBox * ibox, MachineConf * mconf, int idx) 525 | { 526 | if (idx > -1 && ibox->message("Please confirm", "Remove Configuration?", "No", "Yes") == InputResult::Enter) { 527 | mconf->deleteItem(idx); 528 | saveMachineConfiguration(mconf); 529 | } 530 | } 531 | 532 | 533 | void drawInfo(Canvas * canvas) 534 | { 535 | canvas->setPenColor(RGB888(0, 255, 0)); 536 | canvas->drawText(120, 5, "E S P 3 2 P C E M U L A T O R"); 537 | canvas->drawText(93, 25, "www.fabgl.com - by Fabrizio Di Vittorio"); 538 | } 539 | 540 | 541 | // Create FAT formatted floppy image 542 | // diskType: 543 | // 0 = 320 544 | // 1 = 360 545 | // 2 = 720 546 | // 3 = 1200 547 | // 4 = 1440 548 | // 5 = 2880 549 | // directory: absolute path (includes mounting point, ie "/SD/..." 550 | bool createFATFloppyImage(InputBox * ibox, int diskType, char const * directory, char const * filename) 551 | { 552 | // boot sector for: 320K, 360K, 720K, 1440K, 2880K 553 | static const uint8_t BOOTSECTOR_WIN[512] = { 554 | 0xeb, 0x3c, 0x90, 0x4d, 0x53, 0x57, 0x49, 0x4e, 0x34, 0x2e, 0x31, 0x00, 0x02, 0x01, 0x01, 0x00, 0x02, 0xe0, 0x00, 0x40, 0x0b, 0xf0, 0x09, 0x00, 555 | 0x12, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x00, 0x00, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, 556 | 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x46, 0x41, 0x54, 0x31, 0x32, 0x20, 0x20, 0x20, 0x33, 0xc9, 0x8e, 0xd1, 0xbc, 0xfc, 0x7b, 0x16, 0x07, 0xbd, 557 | 0x78, 0x00, 0xc5, 0x76, 0x00, 0x1e, 0x56, 0x16, 0x55, 0xbf, 0x22, 0x05, 0x89, 0x7e, 0x00, 0x89, 0x4e, 0x02, 0xb1, 0x0b, 0xfc, 0xf3, 0xa4, 0x06, 558 | 0x1f, 0xbd, 0x00, 0x7c, 0xc6, 0x45, 0xfe, 0x0f, 0x38, 0x4e, 0x24, 0x7d, 0x20, 0x8b, 0xc1, 0x99, 0xe8, 0x7e, 0x01, 0x83, 0xeb, 0x3a, 0x66, 0xa1, 559 | 0x1c, 0x7c, 0x66, 0x3b, 0x07, 0x8a, 0x57, 0xfc, 0x75, 0x06, 0x80, 0xca, 0x02, 0x88, 0x56, 0x02, 0x80, 0xc3, 0x10, 0x73, 0xed, 0x33, 0xc9, 0xfe, 560 | 0x06, 0xd8, 0x7d, 0x8a, 0x46, 0x10, 0x98, 0xf7, 0x66, 0x16, 0x03, 0x46, 0x1c, 0x13, 0x56, 0x1e, 0x03, 0x46, 0x0e, 0x13, 0xd1, 0x8b, 0x76, 0x11, 561 | 0x60, 0x89, 0x46, 0xfc, 0x89, 0x56, 0xfe, 0xb8, 0x20, 0x00, 0xf7, 0xe6, 0x8b, 0x5e, 0x0b, 0x03, 0xc3, 0x48, 0xf7, 0xf3, 0x01, 0x46, 0xfc, 0x11, 562 | 0x4e, 0xfe, 0x61, 0xbf, 0x00, 0x07, 0xe8, 0x28, 0x01, 0x72, 0x3e, 0x38, 0x2d, 0x74, 0x17, 0x60, 0xb1, 0x0b, 0xbe, 0xd8, 0x7d, 0xf3, 0xa6, 0x61, 563 | 0x74, 0x3d, 0x4e, 0x74, 0x09, 0x83, 0xc7, 0x20, 0x3b, 0xfb, 0x72, 0xe7, 0xeb, 0xdd, 0xfe, 0x0e, 0xd8, 0x7d, 0x7b, 0xa7, 0xbe, 0x7f, 0x7d, 0xac, 564 | 0x98, 0x03, 0xf0, 0xac, 0x98, 0x40, 0x74, 0x0c, 0x48, 0x74, 0x13, 0xb4, 0x0e, 0xbb, 0x07, 0x00, 0xcd, 0x10, 0xeb, 0xef, 0xbe, 0x82, 0x7d, 0xeb, 565 | 0xe6, 0xbe, 0x80, 0x7d, 0xeb, 0xe1, 0xcd, 0x16, 0x5e, 0x1f, 0x66, 0x8f, 0x04, 0xcd, 0x19, 0xbe, 0x81, 0x7d, 0x8b, 0x7d, 0x1a, 0x8d, 0x45, 0xfe, 566 | 0x8a, 0x4e, 0x0d, 0xf7, 0xe1, 0x03, 0x46, 0xfc, 0x13, 0x56, 0xfe, 0xb1, 0x04, 0xe8, 0xc2, 0x00, 0x72, 0xd7, 0xea, 0x00, 0x02, 0x70, 0x00, 0x52, 567 | 0x50, 0x06, 0x53, 0x6a, 0x01, 0x6a, 0x10, 0x91, 0x8b, 0x46, 0x18, 0xa2, 0x26, 0x05, 0x96, 0x92, 0x33, 0xd2, 0xf7, 0xf6, 0x91, 0xf7, 0xf6, 0x42, 568 | 0x87, 0xca, 0xf7, 0x76, 0x1a, 0x8a, 0xf2, 0x8a, 0xe8, 0xc0, 0xcc, 0x02, 0x0a, 0xcc, 0xb8, 0x01, 0x02, 0x80, 0x7e, 0x02, 0x0e, 0x75, 0x04, 0xb4, 569 | 0x42, 0x8b, 0xf4, 0x8a, 0x56, 0x24, 0xcd, 0x13, 0x61, 0x61, 0x72, 0x0a, 0x40, 0x75, 0x01, 0x42, 0x03, 0x5e, 0x0b, 0x49, 0x75, 0x77, 0xc3, 0x03, 570 | 0x18, 0x01, 0x27, 0x0d, 0x0a, 0x49, 0x6e, 0x76, 0x61, 0x6c, 0x69, 0x64, 0x20, 0x73, 0x79, 0x73, 0x74, 0x65, 0x6d, 0x20, 0x64, 0x69, 0x73, 0x6b, 571 | 0xff, 0x0d, 0x0a, 0x44, 0x69, 0x73, 0x6b, 0x20, 0x49, 0x2f, 0x4f, 0x20, 0x65, 0x72, 0x72, 0x6f, 0x72, 0xff, 0x0d, 0x0a, 0x52, 0x65, 0x70, 0x6c, 572 | 0x61, 0x63, 0x65, 0x20, 0x74, 0x68, 0x65, 0x20, 0x64, 0x69, 0x73, 0x6b, 0x2c, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x74, 0x68, 0x65, 0x6e, 0x20, 0x70, 573 | 0x72, 0x65, 0x73, 0x73, 0x20, 0x61, 0x6e, 0x79, 0x20, 0x6b, 0x65, 0x79, 0x0d, 0x0a, 0x00, 0x00, 0x49, 0x4f, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 574 | 0x53, 0x59, 0x53, 0x4d, 0x53, 0x44, 0x4f, 0x53, 0x20, 0x20, 0x20, 0x53, 0x59, 0x53, 0x7f, 0x01, 0x00, 0x41, 0xbb, 0x00, 0x07, 0x60, 0x66, 0x6a, 575 | 0x00, 0xe9, 0x3b, 0xff, 0x00, 0x00, 0x55, 0xaa }; 576 | 577 | // boot sector for: 1200K 578 | static const uint8_t BOOTSECTOR_MSDOS5[512] = { 579 | 0xeb, 0x3c, 0x90, 0x4d, 0x53, 0x44, 0x4f, 0x53, 0x35, 0x2e, 0x30, 0x00, 0x02, 0x01, 0x01, 0x00, 0x02, 0xe0, 0x00, 0x60, 0x09, 0xf9, 0x08, 0x00, 580 | 0x0f, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0xd1, 0x40, 0x38, 0xda, 0x20, 0x20, 0x20, 0x20, 0x20, 581 | 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x46, 0x41, 0x54, 0x31, 0x32, 0x20, 0x20, 0x20, 0xfa, 0x33, 0xc0, 0x8e, 0xd0, 0xbc, 0x00, 0x7c, 0x16, 0x07, 582 | 0xbb, 0x78, 0x00, 0x36, 0xc5, 0x37, 0x1e, 0x56, 0x16, 0x53, 0xbf, 0x3e, 0x7c, 0xb9, 0x0b, 0x00, 0xfc, 0xf3, 0xa4, 0x06, 0x1f, 0xc6, 0x45, 0xfe, 583 | 0x0f, 0x8b, 0x0e, 0x18, 0x7c, 0x88, 0x4d, 0xf9, 0x89, 0x47, 0x02, 0xc7, 0x07, 0x3e, 0x7c, 0xfb, 0xcd, 0x13, 0x72, 0x79, 0x33, 0xc0, 0x39, 0x06, 584 | 0x13, 0x7c, 0x74, 0x08, 0x8b, 0x0e, 0x13, 0x7c, 0x89, 0x0e, 0x20, 0x7c, 0xa0, 0x10, 0x7c, 0xf7, 0x26, 0x16, 0x7c, 0x03, 0x06, 0x1c, 0x7c, 0x13, 585 | 0x16, 0x1e, 0x7c, 0x03, 0x06, 0x0e, 0x7c, 0x83, 0xd2, 0x00, 0xa3, 0x50, 0x7c, 0x89, 0x16, 0x52, 0x7c, 0xa3, 0x49, 0x7c, 0x89, 0x16, 0x4b, 0x7c, 586 | 0xb8, 0x20, 0x00, 0xf7, 0x26, 0x11, 0x7c, 0x8b, 0x1e, 0x0b, 0x7c, 0x03, 0xc3, 0x48, 0xf7, 0xf3, 0x01, 0x06, 0x49, 0x7c, 0x83, 0x16, 0x4b, 0x7c, 587 | 0x00, 0xbb, 0x00, 0x05, 0x8b, 0x16, 0x52, 0x7c, 0xa1, 0x50, 0x7c, 0xe8, 0x92, 0x00, 0x72, 0x1d, 0xb0, 0x01, 0xe8, 0xac, 0x00, 0x72, 0x16, 0x8b, 588 | 0xfb, 0xb9, 0x0b, 0x00, 0xbe, 0xe6, 0x7d, 0xf3, 0xa6, 0x75, 0x0a, 0x8d, 0x7f, 0x20, 0xb9, 0x0b, 0x00, 0xf3, 0xa6, 0x74, 0x18, 0xbe, 0x9e, 0x7d, 589 | 0xe8, 0x5f, 0x00, 0x33, 0xc0, 0xcd, 0x16, 0x5e, 0x1f, 0x8f, 0x04, 0x8f, 0x44, 0x02, 0xcd, 0x19, 0x58, 0x58, 0x58, 0xeb, 0xe8, 0x8b, 0x47, 0x1a, 590 | 0x48, 0x48, 0x8a, 0x1e, 0x0d, 0x7c, 0x32, 0xff, 0xf7, 0xe3, 0x03, 0x06, 0x49, 0x7c, 0x13, 0x16, 0x4b, 0x7c, 0xbb, 0x00, 0x07, 0xb9, 0x03, 0x00, 591 | 0x50, 0x52, 0x51, 0xe8, 0x3a, 0x00, 0x72, 0xd8, 0xb0, 0x01, 0xe8, 0x54, 0x00, 0x59, 0x5a, 0x58, 0x72, 0xbb, 0x05, 0x01, 0x00, 0x83, 0xd2, 0x00, 592 | 0x03, 0x1e, 0x0b, 0x7c, 0xe2, 0xe2, 0x8a, 0x2e, 0x15, 0x7c, 0x8a, 0x16, 0x24, 0x7c, 0x8b, 0x1e, 0x49, 0x7c, 0xa1, 0x4b, 0x7c, 0xea, 0x00, 0x00, 593 | 0x70, 0x00, 0xac, 0x0a, 0xc0, 0x74, 0x29, 0xb4, 0x0e, 0xbb, 0x07, 0x00, 0xcd, 0x10, 0xeb, 0xf2, 0x3b, 0x16, 0x18, 0x7c, 0x73, 0x19, 0xf7, 0x36, 594 | 0x18, 0x7c, 0xfe, 0xc2, 0x88, 0x16, 0x4f, 0x7c, 0x33, 0xd2, 0xf7, 0x36, 0x1a, 0x7c, 0x88, 0x16, 0x25, 0x7c, 0xa3, 0x4d, 0x7c, 0xf8, 0xc3, 0xf9, 595 | 0xc3, 0xb4, 0x02, 0x8b, 0x16, 0x4d, 0x7c, 0xb1, 0x06, 0xd2, 0xe6, 0x0a, 0x36, 0x4f, 0x7c, 0x8b, 0xca, 0x86, 0xe9, 0x8a, 0x16, 0x24, 0x7c, 0x8a, 596 | 0x36, 0x25, 0x7c, 0xcd, 0x13, 0xc3, 0x0d, 0x0a, 0x4e, 0x6f, 0x6e, 0x2d, 0x53, 0x79, 0x73, 0x74, 0x65, 0x6d, 0x20, 0x64, 0x69, 0x73, 0x6b, 0x20, 597 | 0x6f, 0x72, 0x20, 0x64, 0x69, 0x73, 0x6b, 0x20, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x0d, 0x0a, 0x52, 0x65, 0x70, 0x6c, 0x61, 0x63, 0x65, 0x20, 0x61, 598 | 0x6e, 0x64, 0x20, 0x70, 0x72, 0x65, 0x73, 0x73, 0x20, 0x61, 0x6e, 0x79, 0x20, 0x6b, 0x65, 0x79, 0x20, 0x77, 0x68, 0x65, 0x6e, 0x20, 0x72, 0x65, 599 | 0x61, 0x64, 0x79, 0x0d, 0x0a, 0x00, 0x49, 0x4f, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x53, 0x59, 0x53, 0x4d, 0x53, 0x44, 0x4f, 0x53, 0x20, 0x20, 600 | 0x20, 0x53, 0x59, 0x53, 0x00, 0x00, 0x55, 0xaa }; 601 | 602 | static const uint8_t * BOOTSECTOR[6] = { 603 | BOOTSECTOR_WIN, // 320K 604 | BOOTSECTOR_WIN, // 360K 605 | BOOTSECTOR_WIN, // 720K 606 | BOOTSECTOR_MSDOS5, // 1200K 607 | BOOTSECTOR_WIN, // 1440K 608 | BOOTSECTOR_WIN, // 2880K 609 | }; 610 | 611 | // offset 0x0c (16 bytes): 612 | static const uint8_t GEOM[6][16] = { 613 | { 0x02, 0x02, 0x01, 0x00, 0x02, 0x70, 0x00, 0x80, 0x02, 0xFF, 0x01, 0x00, 0x08, 0x00, 0x02, 0x00 }, // 320K 614 | { 0x02, 0x02, 0x01, 0x00, 0x02, 0x70, 0x00, 0xD0, 0x02, 0xFD, 0x02, 0x00, 0x09, 0x00, 0x02, 0x00 }, // 360K 615 | { 0x02, 0x02, 0x01, 0x00, 0x02, 0x70, 0x00, 0xA0, 0x05, 0xF9, 0x03, 0x00, 0x09, 0x00, 0x02, 0x00 }, // 720K 616 | { 0x02, 0x01, 0x01, 0x00, 0x02, 0xE0, 0x00, 0x60, 0x09, 0xF9, 0x08, 0x00, 0x0F, 0x00, 0x02, 0x00 }, // 1200K 617 | { 0x02, 0x01, 0x01, 0x00, 0x02, 0xE0, 0x00, 0x40, 0x0B, 0xF0, 0x09, 0x00, 0x12, 0x00, 0x02, 0x00 }, // 1440K 618 | { 0x02, 0x02, 0x01, 0x00, 0x02, 0xF0, 0x00, 0x80, 0x16, 0xF0, 0x09, 0x00, 0x24, 0x00, 0x02, 0x00 }, // 2880K 619 | }; 620 | 621 | // sizes in bytes 622 | static const int SIZES[6] = { 623 | 512 * 8 * 40 * 2, // 327680 (320K) 624 | 512 * 9 * 40 * 2, // 368640 (360K) 625 | 512 * 9 * 80 * 2, // 737280 (720K) 626 | 512 * 15 * 80 * 2, // 1228800 (1200K) 627 | 512 * 18 * 80 * 2, // 1474560 (1440K) 628 | 512 * 36 * 80 * 2, // 2949120 (2880K) 629 | }; 630 | 631 | // FAT 632 | static const struct { 633 | uint8_t id; 634 | uint8_t fat1size; // in 512 blocks 635 | uint8_t fat2size; // in 512 blocks 636 | } FAT[6] = { 637 | { 0xff, 1, 8 }, // 320K 638 | { 0xfd, 2, 9 }, // 360K 639 | { 0xf9, 3, 10 }, // 720K 640 | { 0xf9, 8, 22 }, // 1200K 641 | { 0xf0, 9, 23 }, // 1440K 642 | { 0xf0, 9, 24 }, // 2880K 643 | }; 644 | 645 | auto file = FileBrowser(directory).openFile(filename, "wb"); 646 | 647 | if (file) { 648 | 649 | auto sectbuf = (uint8_t*) SOC_EXTRAM_DATA_LOW; // use PSRAM as buffer 650 | 651 | // initial fill with all 0xf6 up to entire size 652 | memset(sectbuf, 0xf6, 512); 653 | fseek(file, 0, SEEK_SET); 654 | 655 | ibox->progressBox("", "Abort", true, 380, [&](fabgl::ProgressForm * form) { 656 | for (int i = 0; i < SIZES[diskType]; i += 512) { 657 | fwrite(sectbuf, 1, 512, file); 658 | if (!form->update((int)((double)i / SIZES[diskType] * 100), "Formatting %s (%d / %d bytes)", filename, i, SIZES[diskType])) 659 | break; 660 | } 661 | }); 662 | 663 | // offset 0x00 (512 bytes) : write boot sector 664 | fseek(file, 0, SEEK_SET); 665 | fwrite(BOOTSECTOR[diskType], 1, 512, file); 666 | 667 | // offset 0x0c (16 bytes) : disk geometry 668 | fseek(file, 0x0c, SEEK_SET); 669 | fwrite(GEOM[diskType], 1, 16, file); 670 | 671 | // offset 0x27 (4 bytes) : Volume Serial Number 672 | const uint32_t volSN = rand(); 673 | fseek(file, 0x27, SEEK_SET); 674 | fwrite(&volSN, 1, 4, file); 675 | 676 | // FAT 677 | memset(sectbuf, 0x00, 512); 678 | fseek(file, 0x200, SEEK_SET); 679 | for (int i = 0; i < (FAT[diskType].fat1size + FAT[diskType].fat2size); ++i) 680 | fwrite(sectbuf, 1, 512, file); 681 | sectbuf[0] = FAT[diskType].id; 682 | sectbuf[1] = 0xff; 683 | sectbuf[2] = 0xff; 684 | fseek(file, 0x200, SEEK_SET); 685 | fwrite(sectbuf, 1, 3, file); 686 | fseek(file, 0x200 + FAT[diskType].fat1size * 512, SEEK_SET); 687 | fwrite(sectbuf, 1, 3, file); 688 | 689 | fclose(file); 690 | } 691 | 692 | return file != nullptr; 693 | } 694 | -------------------------------------------------------------------------------- /mconf.h: -------------------------------------------------------------------------------- 1 | /* 2 | Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - 3 | Copyright (c) 2019-2022 Fabrizio Di Vittorio. 4 | All rights reserved. 5 | 6 | 7 | * Please contact fdivitto2013@gmail.com if you need a commercial license. 8 | 9 | 10 | * This library and related software is available under GPL v3. 11 | 12 | FabGL is free software: you can redistribute it and/or modify 13 | it under the terms of the GNU General Public License as published by 14 | the Free Software Foundation, either version 3 of the License, or 15 | (at your option) any later version. 16 | 17 | FabGL is distributed in the hope that it will be useful, 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 | GNU General Public License for more details. 21 | 22 | You should have received a copy of the GNU General Public License 23 | along with FabGL. If not, see . 24 | */ 25 | 26 | 27 | 28 | /* 29 | 30 | ** Disks configuration text format ** 31 | 32 | Each line contains a machine configuration, which includes description and disks images location. Location can be a URL or a local path. 33 | 34 | Allowed tags: 35 | 36 | "desc" : Textual description of the configuration 37 | "fd0" : Floppy drive 0 (A) filename or URL 38 | "fd1" : Floppy drive 1 (B) filename or URL 39 | "hd0" : Hard disk drive 0 filename or URL 40 | "hd1" : Hard disk drive 1 filename or URL 41 | "chs0" : Hard disk 0 geometry (Cylinders,Heads,Sectors) 42 | "chs1" : Hard disk 1 geometry (Cylinders,Heads,Sectors) 43 | "boot" : Boot drive. Values: fd0, fd1, hd0, hd1. Default is fd0 44 | 45 | A filename may contain a path, relative to SD_MOUNT_PATH mounting path. For example, if "disks/disk1.img" is specified and SD_MOUNT_PATH="/SD", then it loads "/SD/disks/disk1.img". 46 | 47 | 48 | Examples: 49 | 50 | Download first floppy image from "http://www.fabglib.org/downloads/A_freedos.img" and first hard disk image from "http://www.fabglib.org/downloads/C_dosdev.img". Boot from floppy: 51 | desc "FreeDOS (A:) + DOS Programming Tools (C:)" fd0 "http://www.fabglib.org/downloads/A_freedos.img" hd0 "http://www.fabglib.org/downloads/C_dosdev.img" 52 | 53 | First hard disk is "HDD_10M.IMG", having 306 cylinders, 4 heads and 17 sectors. Boot from hard disk: 54 | desc "My Own MSDOS" hd0 HDD_10M.IMG chs0 306,4,17 boot hd0 55 | 56 | First floppy drive is "TESTBOOT.IMG". Boot from first floppy: 57 | desc "Floppy Only" fd0 TESTBOOT.IMG boot fd0 58 | 59 | Boot from disk1.img located inside "msdos3" folder: 60 | desc "Machine1" fd0 msdos3/disk1.img 61 | 62 | */ 63 | 64 | 65 | #pragma once 66 | 67 | 68 | #include 69 | #include 70 | #include 71 | #include 72 | 73 | #include "bios.h" 74 | 75 | 76 | #define SD_MOUNT_PATH "/SD" 77 | 78 | #define MACHINE_CONF_FILENAME "mconfs.txt" 79 | 80 | #define NL "\r\n" 81 | 82 | 83 | static const char DefaultConfFile[] = 84 | "desc \"FreeDOS (floppy 1.44MB)\" fd0 http://www.fabglib.org/downloads/floppy_FREEDOS.img" NL 85 | "desc \"MS-DOS 3.31 (floppy 1.44MB)\" fd0 http://www.fabglib.org/downloads/floppy_MSDOS331.img" NL 86 | "desc \"CP/M 86 + Turbo Pascal 3 (floppy 1.44MB)\" fd0 http://www.fabglib.org/downloads/floppy_CPM86.img" NL 87 | "desc \"Linux ELKS 0.4.0 (floppy 1.44MB)\" fd0 http://www.fabglib.org/downloads/floppy_ELK040.img" NL 88 | "desc \"FreeDOS (HDD 8MB)\" hd0 http://www.fabglib.org/downloads/hd8_FREEDOS.img boot hd0" NL 89 | "desc \"DOS Programs and Games (HDD 20MB)\" hd0 http://www.fabglib.org/downloads/hd20_DOSPROG.img boot hd0" NL 90 | "desc \"DOS Programming Tools (HDD 20MB)\" hd0 http://www.fabglib.org/downloads/hd20_DOSDEV.img boot hd0" NL 91 | "desc \"Windows 3.0 (HDD 20MB)\" hd0 http://www.fabglib.org/downloads/hd20_WINHERC.img boot hd0" NL 92 | "desc \"GEM 3.13 (HDD 8MB)\" hd0 http://www.fabglib.org/downloads/hd8_GEM31.img boot hd0" NL 93 | "desc \"GEOS 2.0 (HDD 20MB)\" hd0 http://www.fabglib.org/downloads/hd20_GEOS20.img boot hd0" NL 94 | "desc \"MS-DOS 5.00 (HDD 8MB)\" hd0 http://www.fabglib.org/downloads/hd8_MSDOS500.img boot hd0" NL 95 | "desc \"MS-DOS 6.22 (HDD 8MB)\" hd0 http://www.fabglib.org/downloads/hd8_MSDOS622.img boot hd0" NL 96 | "desc \"SvarDOS (HDD (hDD 10MB)\" hd0 http://www.fabglib.org/downloads/hd10_SVARDOS.img boot hd0" NL; 97 | 98 | 99 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 100 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 101 | // MachineConf 102 | 103 | 104 | struct MachineConfItem { 105 | MachineConfItem * next; 106 | char * desc; 107 | char * disk[DISKCOUNT]; // path relative to mounting path 108 | uint16_t cylinders[DISKCOUNT]; 109 | uint16_t heads[DISKCOUNT]; 110 | uint16_t sectors[DISKCOUNT]; 111 | uint8_t bootDrive; 112 | 113 | MachineConfItem() 114 | : next(nullptr), 115 | desc(nullptr), 116 | disk(), 117 | cylinders(), 118 | heads(), 119 | sectors(), 120 | bootDrive(0) 121 | { 122 | } 123 | 124 | ~MachineConfItem() 125 | { 126 | free(desc); 127 | for (int i = 0; i < DISKCOUNT; ++i) 128 | free(disk[i]); 129 | } 130 | 131 | bool isValid() { return desc != nullptr; } 132 | 133 | void setDesc(char const * value) { free(desc); desc = strdup(value); } 134 | void setDisk(int index, char const * value) { free(disk[index]); disk[index] = strdup(value); } 135 | void setCHS(int index, char const * value) { sscanf(value, "%hu,%hu,%hu", &cylinders[index], &heads[index], §ors[index]); } 136 | 137 | void setBootDrive(char const * value) { 138 | for (int i = 0; i < DISKCOUNT; ++i) 139 | if (strcmp(value, driveIndexToStr(i)) == 0) { 140 | bootDrive = i; 141 | return; 142 | } 143 | } 144 | 145 | static char const * driveIndexToStr(int index) { 146 | static char const * DRVNAME[DISKCOUNT] = { "fd0", "fd1", "hd0", "hd1" }; 147 | return DRVNAME[index]; 148 | } 149 | }; 150 | 151 | 152 | class MachineConf { 153 | public: 154 | MachineConf(); 155 | ~MachineConf(); 156 | 157 | void loadFromFile(FILE * file); 158 | void saveToFile(FILE * file); 159 | 160 | bool deleteItem(int index); 161 | 162 | void addItem(MachineConfItem * item); 163 | void insertItem(int insertingPoint, MachineConfItem * item); 164 | 165 | MachineConfItem * getFirstItem() { return m_itemsList; } 166 | MachineConfItem * getItem(int index); 167 | 168 | private: 169 | 170 | void cleanUp(); 171 | 172 | MachineConfItem * m_itemsList; 173 | 174 | }; 175 | 176 | 177 | 178 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 179 | //////////////////////////////////////////////////////////////////////////////////////////////////////////// 180 | // helpers 181 | 182 | 183 | void loadMachineConfiguration(MachineConf * mconf); 184 | 185 | void saveMachineConfiguration(MachineConf * mconf); 186 | 187 | void editConfigDialog(InputBox * ibox, MachineConf * mconf, int idx); 188 | 189 | void newConfigDialog(InputBox * ibox, MachineConf * mconf, int idx); 190 | 191 | void delConfigDialog(InputBox * ibox, MachineConf * mconf, int idx); 192 | 193 | void drawInfo(Canvas * canvas); 194 | 195 | bool createFATFloppyImage(InputBox * ibox, int diskType, char const * directory, char const * filename); 196 | --------------------------------------------------------------------------------