├── .gitattributes ├── .gitignore ├── BOM └── GENESIS2PCE v3.xlsx ├── GENESIS2PCE ├── GENESIS2PCE.componentinfo.xml ├── GENESIS2PCE.cproj ├── main.c ├── main.h ├── millis.c └── millis.h ├── Gerber └── GENESIS2PCE v3.zip ├── Hex ├── Changelog.md ├── GENESIS2PCE v1.hex ├── GENESIS2PCE v3.1.hex ├── GENESIS2PCE v3.2.hex └── GENESIS2PCE v3.hex ├── Images ├── boardv1.jpg ├── boardv3.jpg └── boardv3_real.jpg ├── LICENSE └── README.md /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.atsln 2 | .vs 3 | GENESIS2PCE/Debug 4 | GENESIS2PCE/Release 5 | -------------------------------------------------------------------------------- /BOM/GENESIS2PCE v3.xlsx: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Infinest/GENESIS2PCE/4657bf1e2084907e793e173fbdbdcb19fcb643bf/BOM/GENESIS2PCE v3.xlsx -------------------------------------------------------------------------------- /GENESIS2PCE/GENESIS2PCE.componentinfo.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | Device 8 | Startup 9 | 10 | 11 | Atmel 12 | 1.3.0 13 | F:/Programs\Atmel Studio\7.0\Packs 14 | 15 | 16 | 17 | 18 | F:/Programs\Atmel Studio\7.0\Packs\atmel\ATmega_DFP\1.3.300\include 19 | 20 | include 21 | C 22 | 23 | 24 | include 25 | 26 | 27 | 28 | 29 | F:/Programs\Atmel Studio\7.0\Packs\atmel\ATmega_DFP\1.3.300\include\avr\iom328p.h 30 | 31 | header 32 | C 33 | UMk4QUzkkuShabuoYtNl/Q== 34 | 35 | include/avr/iom328p.h 36 | 37 | 38 | 39 | 40 | F:/Programs\Atmel Studio\7.0\Packs\atmel\ATmega_DFP\1.3.300\templates\main.c 41 | template 42 | source 43 | C Exe 44 | vIK0cEq/UAZ5Fh36zXpv3w== 45 | 46 | templates/main.c 47 | Main file (.c) 48 | 49 | 50 | 51 | F:/Programs\Atmel Studio\7.0\Packs\atmel\ATmega_DFP\1.3.300\templates\main.cpp 52 | template 53 | source 54 | C Exe 55 | YXFphlh0CtZJU+ebktABgQ== 56 | 57 | templates/main.cpp 58 | Main file (.cpp) 59 | 60 | 61 | 62 | F:/Programs\Atmel Studio\7.0\Packs\atmel\ATmega_DFP\1.3.300\gcc\dev\atmega328p 63 | 64 | libraryPrefix 65 | GCC 66 | 67 | 68 | gcc/dev/atmega328p 69 | 70 | 71 | 72 | 73 | ATmega_DFP 74 | F:/Programs/Atmel Studio/7.0/Packs/atmel/ATmega_DFP/1.3.300/Atmel.ATmega_DFP.pdsc 75 | 1.3.300 76 | true 77 | ATmega328P 78 | 79 | 80 | 81 | Resolved 82 | Fixed 83 | true 84 | 85 | 86 | -------------------------------------------------------------------------------- /GENESIS2PCE/GENESIS2PCE.cproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 2.0 5 | 7.0 6 | com.Atmel.AVRGCC8.C 7 | dce6c7e3-ee26-4d79-826b-08594b9ad897 8 | ATmega328P 9 | none 10 | Executable 11 | C 12 | $(MSBuildProjectName) 13 | .elf 14 | $(MSBuildProjectDirectory)\$(Configuration) 15 | GENESIS2PCE 16 | GENESIS2PCE 17 | GENESIS2PCE 18 | Native 19 | true 20 | false 21 | true 22 | true 23 | 0x20000000 24 | 25 | true 26 | exception_table 27 | 2 28 | 0 29 | 0 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | com.atmel.avrdbg.tool.simulator 44 | 45 | 0x1E950F 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | com.atmel.avrdbg.tool.simulator 54 | 55 | 56 | Simulator 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | custom 67 | 68 | 69 | Custom Programming Tool 70 | 71 | 72 | 73 | 74 | 75 | -mmcu=atmega328p -B "%24(PackRepoDir)\atmel\ATmega_DFP\1.3.300\gcc\dev\atmega328p" 76 | True 77 | True 78 | True 79 | True 80 | False 81 | True 82 | True 83 | 84 | 85 | NDEBUG 86 | 87 | 88 | 89 | 90 | %24(PackRepoDir)\atmel\ATmega_DFP\1.3.300\include 91 | 92 | 93 | Optimize (-O1) 94 | True 95 | True 96 | True 97 | 98 | 99 | libm 100 | 101 | 102 | 103 | 104 | %24(PackRepoDir)\atmel\ATmega_DFP\1.3.300\include 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | -mmcu=atmega328p -B "%24(PackRepoDir)\atmel\ATmega_DFP\1.3.300\gcc\dev\atmega328p" 114 | True 115 | True 116 | True 117 | True 118 | False 119 | True 120 | True 121 | 122 | 123 | DEBUG 124 | 125 | 126 | 127 | 128 | %24(PackRepoDir)\atmel\ATmega_DFP\1.3.300\include 129 | 130 | 131 | Optimize (-O1) 132 | True 133 | True 134 | Default (-g2) 135 | True 136 | 137 | 138 | libm 139 | 140 | 141 | 142 | 143 | %24(PackRepoDir)\atmel\ATmega_DFP\1.3.300\include 144 | 145 | 146 | Default (-Wa,-g) 147 | 148 | 149 | 150 | 151 | 152 | compile 153 | 154 | 155 | compile 156 | 157 | 158 | compile 159 | 160 | 161 | compile 162 | 163 | 164 | 165 | -------------------------------------------------------------------------------- /GENESIS2PCE/main.c: -------------------------------------------------------------------------------- 1 | /* 2 | * GENESIS2PCE.c 3 | * 4 | * Created: 02.05.2020 14:36:24 5 | * Author : Infinest 6 | */ 7 | 8 | #include "main.h" 9 | 10 | int main(void) 11 | { 12 | /* 13 | Initialize Ports 14 | PORT C is used for Inputs from Genesis controller and Genesis select pin as output 15 | PORT B is used for PCE mode output and PCE pad output pins. PB5 is used as select output on Genesis Pin 7 16 | PORT D is exclusively used for PCE pad output pins 17 | */ 18 | DDRC = 0x0; 19 | DDRB = 0xFF; 20 | DDRD = 0xFF; 21 | 22 | PORTC = 0xFF; 23 | PORTB = 0xEF; // LED should be off and PCE mode on 2-Button on init 24 | PORTD = 0xFF; 25 | 26 | // Load state of swapping of Run and Select assignment. If value is not 0, make sure it's 1 by doing a bitwise and with 1 27 | swapState = eeprom_read_byte(0) & 1; 28 | configureSwappableButtons(); 29 | 30 | // Initialize Timer0 31 | initTimer(); 32 | while (1) 33 | { 34 | if(millis() - lastReadTime > MS_DELAY) 35 | { 36 | cli(); 37 | readController(); 38 | bitWrite(PORTB, PCE_MODE_AND_LED, sixButtonMode); 39 | setPCE(); 40 | // If A, B, C and Start are pressed, increment swapTimer. Else reset swapTimer to 0. 41 | if((state & 0b11110000) == 0) 42 | { 43 | swapTimer++; 44 | // If swapTimer has reached it's trigger value, flip swapState, write it to the eeprom storage and update PC Engine output pin assignment. 45 | if(swapTimer == SWAP_TIMER_TRIGGER_VALUE) 46 | { 47 | swapTimer = 0; 48 | swapState ^= 1; 49 | eeprom_write_byte(0, swapState); 50 | configureSwappableButtons(); 51 | } 52 | } 53 | else 54 | { 55 | swapTimer = 0; 56 | } 57 | } 58 | sei(); 59 | } 60 | } 61 | 62 | /* 63 | Assigns PC Engine output pins depending on current swapState 64 | */ 65 | void configureSwappableButtons() 66 | { 67 | if(swapState == 0) 68 | { 69 | PC_SWAPPABLE_1 = PC_PIN_SELECT; 70 | PC_SWAPPABLE_2 = PC_PIN_RUN; 71 | } 72 | else 73 | { 74 | PC_SWAPPABLE_1 = PC_PIN_RUN; 75 | PC_SWAPPABLE_2 = PC_PIN_SELECT; 76 | 77 | } 78 | } 79 | 80 | /* 81 | Sets PCE buttons according to current pad mode 82 | */ 83 | void setPCE() 84 | { 85 | bitWrite(PORTD, PC_PIN_I, bitRead(state, STATE_C)); 86 | bitWrite(PORTD, PC_PIN_II, bitRead(state, STATE_B)); 87 | bitWrite(PORTB, PC_PIN_LEFT, bitRead(state, STATE_LEFT)); 88 | bitWrite(PORTD, PC_PIN_RIGHT, bitRead(state, STATE_RIGHT)); 89 | bitWrite(PORTB, PC_SWAPPABLE_2, bitRead(state, STATE_START)); 90 | bitWrite(PORTD, PC_PIN_UP, bitRead(state, STATE_UP)); 91 | bitWrite(PORTB, PC_PIN_DOWN, bitRead(state, STATE_DOWN)); 92 | if(sixButtonMode) 93 | { 94 | bitWrite(PORTB, PC_SWAPPABLE_1, bitRead(state, STATE_MODE)); 95 | bitWrite(PORTD, PC_PIN_III, bitRead(state, STATE_A)); 96 | bitWrite(PORTD, PC_PIN_IV, bitRead(state, STATE_X)); 97 | bitWrite(PORTD, PC_PIN_V, bitRead(state, STATE_Y)); 98 | bitWrite(PORTD, PC_PIN_VI, bitRead(state, STATE_Z)); 99 | } 100 | else 101 | { 102 | bitWrite(PORTB, PC_SWAPPABLE_1, bitRead(state, STATE_A)); 103 | bitWrite(PORTD, PC_PIN_III, 1); 104 | bitWrite(PORTD, PC_PIN_IV, 1); 105 | bitWrite(PORTD, PC_PIN_V, 1); 106 | bitWrite(PORTD, PC_PIN_VI, 1); 107 | } 108 | } 109 | 110 | /* 111 | Performs one controller read. 112 | One controller read consists of 8 read cycles. 113 | See "https://segaretro.org/Six_Button_Control_Pad_(Mega_Drive)#Technical_information" 114 | */ 115 | void readController() 116 | { 117 | for(uint8_t cycle = 1; cycle <= CYCLES_PER_READ; cycle++) 118 | { 119 | if(!doReadCycle(cycle)) 120 | { 121 | break; 122 | } 123 | } 124 | } 125 | 126 | /* 127 | Performs a single read cycle for the Genesis Pad 128 | */ 129 | bool doReadCycle(uint8_t cycle) 130 | { 131 | bitWrite(PORTB, GEN_7, cycle % 2); 132 | switch(cycle) 133 | { 134 | case 2: 135 | if((GEN_3 | GEN_4) == 0) 136 | { 137 | bitWrite(state, STATE_A, GEN_6); 138 | bitWrite(state, STATE_START, GEN_9); 139 | } 140 | else 141 | { 142 | state = 0b1111111111111111; 143 | sixButtonMode = false; 144 | return false; 145 | } 146 | break; 147 | case 3: 148 | bitWrite(state, STATE_UP, GEN_1); 149 | bitWrite(state, STATE_DOWN, GEN_2); 150 | bitWrite(state, STATE_LEFT, GEN_3); 151 | bitWrite(state, STATE_RIGHT, GEN_4); 152 | bitWrite(state, STATE_B, GEN_6); 153 | bitWrite(state, STATE_C, GEN_9); 154 | break; 155 | case 4: 156 | _delay_us(1); // MCU is reading the controller too fast. Unless we wait a microsecond we do not get the correct information about the six button mode 157 | sixButtonMode = GEN_1 == 0 && GEN_2 == 0; 158 | break; 159 | case 5: 160 | if(sixButtonMode) 161 | { 162 | bitWrite(state, STATE_Z, GEN_1); 163 | bitWrite(state, STATE_Y, GEN_2); 164 | bitWrite(state, STATE_X, GEN_3); 165 | bitWrite(state, STATE_MODE, GEN_4); 166 | } 167 | else 168 | { 169 | state |= 0b0000111100000000; 170 | } 171 | break; 172 | case 8: 173 | lastReadTime = millis(); 174 | break; 175 | } 176 | return true; 177 | } 178 | -------------------------------------------------------------------------------- /GENESIS2PCE/main.h: -------------------------------------------------------------------------------- 1 | /* 2 | * main.h 3 | * 4 | * Created: 02.05.2020 17:10:04 5 | * Author: Infinest 6 | */ 7 | 8 | 9 | #ifndef MAIN_H_ 10 | #define MAIN_H_ 11 | 12 | #include "millis.h" 13 | #include 14 | #include 15 | #include 16 | #include 17 | #include 18 | #include 19 | #include 20 | 21 | FUSES = 22 | { 23 | .low = 0xDF, 24 | .high = 0xFE, 25 | .extended = 0xFC, 26 | }; 27 | 28 | #define bitRead(value, bit) (((value) >> (bit)) & 0x01) 29 | #define bitSet(value, bit) ((value) |= (1UL << (bit))) 30 | #define bitClear(value, bit) ((value) &= ~(1UL << (bit))) 31 | #define bitWrite(value, bit, bitvalue) (bitvalue ? bitSet(value, bit) : bitClear(value, bit)) 32 | 33 | #define MS_DELAY 3 34 | #define CYCLES_PER_READ 8 35 | 36 | #define GEN_1 bitRead(PINC, PINC3) 37 | #define GEN_2 bitRead(PINC, PINC2) 38 | #define GEN_3 bitRead(PINC, PINC1) 39 | #define GEN_4 bitRead(PINC, PINC0) 40 | #define GEN_6 bitRead(PINC, PINC5) 41 | #define GEN_7 PINB5 42 | #define GEN_9 bitRead(PINC, PINC4) 43 | 44 | #define PCE_MODE_AND_LED PINB4 45 | 46 | //1Y 47 | #define PC_PIN_I PIND0//PIND5 48 | #define PC_PIN_UP PIND6//PINB1 49 | //2Y 50 | #define PC_PIN_II PIND1//PIND4 51 | #define PC_PIN_RIGHT PIND7//PINB3 52 | //4Y 53 | #define PC_PIN_RUN PINB3//PIND7 54 | #define PC_PIN_LEFT PINB1//PIND6 55 | //3Y 56 | #define PC_PIN_SELECT PINB2//PINB0 57 | #define PC_PIN_DOWN PINB0//PINB2 58 | // 2 1Y 59 | #define PC_PIN_III PIND2//PIND3 60 | // 2 2Y 61 | #define PC_PIN_IV PIND3//PIND2 62 | // 2 3Y 63 | #define PC_PIN_V PIND4//PIND1 64 | // 2 4Y 65 | #define PC_PIN_VI PIND5//PIND0 66 | 67 | #define SWAP_TIMER_TRIGGER_VALUE 0xA00 68 | 69 | enum 70 | { 71 | STATE_UP = 0, 72 | STATE_DOWN = 1, 73 | STATE_LEFT = 2, 74 | STATE_RIGHT = 3, 75 | STATE_START = 4, 76 | STATE_A = 5, 77 | STATE_B = 6, 78 | STATE_C = 7, 79 | STATE_X = 8, 80 | STATE_Y = 9, 81 | STATE_Z = 10, 82 | STATE_MODE = 11, 83 | }; 84 | 85 | unsigned long lastReadTime = 0; 86 | uint16_t state = 0b1111111111111111; 87 | bool sixButtonMode = false; 88 | uint8_t swapState; 89 | uint8_t PC_SWAPPABLE_1; 90 | uint8_t PC_SWAPPABLE_2; 91 | uint16_t swapTimer = 0; 92 | 93 | int main(void); 94 | void setPCE(); 95 | bool doReadCycle(uint8_t cycle); 96 | void readController(); 97 | void writeBit(uint16_t *port, uint8_t pin, uint8_t bit); 98 | void configureSwappableButtons(); 99 | 100 | #endif /* MAIN_H_ */ 101 | -------------------------------------------------------------------------------- /GENESIS2PCE/millis.c: -------------------------------------------------------------------------------- 1 | /* 2 | * millis.c 3 | * 4 | * Created: 02.05.2020 14:42:24 5 | * Author: Infinest 6 | */ 7 | 8 | #include "millis.h" 9 | 10 | ISR(TIMER0_OVF_vect) 11 | { 12 | // copy these to local variables so they can be stored in registers 13 | // (volatile variables must be read from memory on every access) 14 | unsigned long m = timer0_millis; 15 | unsigned int f = timer0_fract; 16 | m += MILLISECOND_INCREMENT; 17 | f += FRACT_INCREMENT; 18 | //Once fraction is big enough to make up an entire millisecond we increment m by one and decrement f by 1000 19 | if(1000 <= f) 20 | { 21 | m++; 22 | f -= 1000; 23 | } 24 | timer0_millis = m; 25 | timer0_fract = f; 26 | } 27 | 28 | void initTimer() 29 | { 30 | //Enable global interrupts 31 | sei(); 32 | //Prescale by Clock / 64 33 | TCCR0B |= 1<<(CS01) | 1< 14 | #include 15 | #include 16 | 17 | #define clockCyclesPerMicrosecond() ( F_CPU / 1000000L ) 18 | #define MICROSECONDS_EACH_TIMER0_OVERFLOW (64*256 / clockCyclesPerMicrosecond()) 19 | #define MILLISECOND_INCREMENT MICROSECONDS_EACH_TIMER0_OVERFLOW / 1000 20 | #define FRACT_INCREMENT (MICROSECONDS_EACH_TIMER0_OVERFLOW % 1000) 21 | 22 | volatile unsigned long timer0_millis; 23 | volatile unsigned int timer0_fract; 24 | 25 | volatile unsigned long timer0_millis; 26 | volatile unsigned int timer0_fract; 27 | void initTimer(); 28 | unsigned long millis(); 29 | 30 | #endif /* MILLIS_H_ */ -------------------------------------------------------------------------------- /Gerber/GENESIS2PCE v3.zip: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Infinest/GENESIS2PCE/4657bf1e2084907e793e173fbdbdcb19fcb643bf/Gerber/GENESIS2PCE v3.zip -------------------------------------------------------------------------------- /Hex/Changelog.md: -------------------------------------------------------------------------------- 1 | # Changelog 2 | ### v1 3 | - Initial code for prototype board 4 | --- 5 | ### v2 6 | - Change pinout to fit board revision 2 7 | --- 8 | ### v3 9 | - Change pinout to fit board revision 3 10 | --- 11 | ### v3.1 12 | - Lower delay inbetween read cycles to 2 ms 13 | ---- 14 | ### v3.2 15 | - Add button combination to swap Run and Select assignment (A, B, C & Start) -------------------------------------------------------------------------------- /Hex/GENESIS2PCE v1.hex: -------------------------------------------------------------------------------- 1 | :100000000C9434000C9451000C9451000C94510049 2 | :100010000C9451000C9451000C9451000C9451001C 3 | :100020000C9451000C9451000C9451000C9451000C 4 | :100030000C9451000C9451000C9451000C945100FC 5 | :100040000C9457020C9451000C9451000C945100E4 6 | :100050000C9451000C9451000C9451000C945100DC 7 | :100060000C9451000C94510011241FBECFEFD8E026 8 | :10007000DEBFCDBF11E0A0E0B1E0E8E6F5E002C0F0 9 | :1000800005900D92A230B107D9F721E0A2E0B1E0CE 10 | :1000900001C01D92AD30B207E1F70E9429020C9415 11 | :1000A000B2020C9400008091000187FF02C05D9AAB 12 | :1000B00001C05D988091000186FF02C05C9A01C07A 13 | :1000C0005C988091000182FF02C05E9A01C05E9838 14 | :1000D0008091000183FF02C02B9A01C02B98809170 15 | :1000E000000184FF02C0289A01C028988091000175 16 | :1000F00080FF02C0299A01C029988091000181FFE8 17 | :1001000002C02A9A01C02A9880910201882361F1D5 18 | :10011000809100019091010193FF02C05F9A01C09C 19 | :100120005F988091000185FF02C05B9A01C05B98D7 20 | :10013000809100019091010190FF02C05A9A01C084 21 | :100140005A98809100019091010191FF02C0599A43 22 | :1001500001C05998809100019091010192FF02C065 23 | :10016000589A0895589808958091000185FF02C01B 24 | :100170005F9A01C05F985B9A5A9A599A589A089563 25 | :1001800080FF02C0409A01C04098843009F4D0C07A 26 | 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:1002D000010180930001319B0AC08091000190913F 47 | :1002E00001018064909301018093000109C0809115 48 | :1002F0000001909101018F7B909301018093000197 49 | :100300001D9B0BC08091000190910101806890932A 50 | :1003100001018093000181E0089580910001909196 51 | :1003200001018F77909301018093000181E008958E 52 | :1003300085E08A95F1F70000359906C086B182956F 53 | :10034000817091E0892701C080E081708093020173 54 | :1003500081E0089580910201882309F455C0359BFE 55 | :100360000AC02091000130910101346030930101F5 56 | :100370002093000109C020910001309101013B7FD1 57 | :100380003093010120930001349B0AC020910001A9 58 | :10039000309101013260309301012093000109C0C6 59 | :1003A00020910001309101013D7F309301012093A4 60 | :1003B0000001339B0AC0209100013091010131609E 61 | :1003C000309301012093000109C020910001309178 62 | :1003D00001013E7F3093010120930001329B0AC04E 63 | :1003E0002091000130910101386030930101209388 64 | :1003F000000108952091000130910101377F309371 65 | :100400000101209300010895809100019091010164 66 | :100410009F60909301018093000181E008950E9404 67 | :10042000A6026093030170930401809305019093E9 68 | :10043000060181E0089581E00895CF93C1E08C2FFB 69 | :100440000E94C000882319F0CF5FC930C1F7CF9157 70 | :10045000089581E087B98FED84B98FEF8AB988B9A3 71 | :100460009FEE95B98BB90E949C020E94A602009152 72 | :100470000301109104012091050130910601DC0176 73 | :10048000CB01801B910BA20BB30B0697A105B10505 74 | :1004900060F0F8940E941D0280910201882311F0FF 75 | :1004A0002C9A01C02C980E9453007894DECF1F92A2 76 | :1004B0000F920FB60F9211242F933F934F935F9398 77 | :1004C0006F938F939F93AF93BF9380910701909108 78 | :1004D0000801A0910901B0910A0140910B015091CE 79 | :1004E0000C019A01285E3F4F283E63E0360720F456 80 | :1004F0000196A11DB11D06C00296A11DB11D9A0154 81 | :10050000205D33408093070190930801A093090177 82 | :10051000B0930A0130930C0120930B01BF91AF916E 83 | :100520009F918F916F915F914F913F912F910F907C 84 | :100530000FBE0F901F901895789485B5836085BD88 85 | :10054000EEE6F0E080818160808308952FB7F89413 86 | :1005500060910701709108018091090190910A0151 87 | :080560002FBF0895F894FFCFAE 88 | :02056800FFFF93 89 | :00000001FF 90 | -------------------------------------------------------------------------------- /Hex/GENESIS2PCE v3.1.hex: -------------------------------------------------------------------------------- 1 | :100000000C9434000C9451000C9451000C94510049 2 | :100010000C9451000C9451000C9451000C9451001C 3 | :100020000C9451000C9451000C9451000C9451000C 4 | :100030000C9451000C9451000C9451000C945100FC 5 | :100040000C9452020C9451000C9451000C945100E9 6 | :100050000C9451000C9451000C9451000C945100DC 7 | :100060000C9451000C94510011241FBECFEFD8E026 8 | :10007000DEBFCDBF11E0A0E0B1E0EEE5F5E002C0EB 9 | :1000800005900D92A230B107D9F721E0A2E0B1E0CE 10 | :1000900001C01D92AD30B207E1F70E9426020C9418 11 | :1000A000AD020C9400008091000187FF02C0589AB5 12 | :1000B00001C058988091000186FF02C0599A01C082 13 | :1000C00059988091000182FF02C0299A01C02998A5 14 | :1000D0008091000183FF02C05F9A01C05F98809108 15 | 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-------------------------------------------------------------------------------- https://raw.githubusercontent.com/Infinest/GENESIS2PCE/4657bf1e2084907e793e173fbdbdcb19fcb643bf/Images/boardv1.jpg -------------------------------------------------------------------------------- /Images/boardv3.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Infinest/GENESIS2PCE/4657bf1e2084907e793e173fbdbdcb19fcb643bf/Images/boardv3.jpg -------------------------------------------------------------------------------- /Images/boardv3_real.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Infinest/GENESIS2PCE/4657bf1e2084907e793e173fbdbdcb19fcb643bf/Images/boardv3_real.jpg -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. We, the Free Software Foundation, use the 18 | GNU General Public License for most of our software; it applies also to 19 | any other work released this way by its authors. You can apply it to 20 | your programs, too. 21 | 22 | When we speak of free software, we are referring to freedom, not 23 | price. Our General Public Licenses are designed to make sure that you 24 | have the freedom to distribute copies of free software (and charge for 25 | them if you wish), that you receive source code or can get it if you 26 | want it, that you can change the software or use pieces of it in new 27 | free programs, and that you know you can do these things. 28 | 29 | To protect your rights, we need to prevent others from denying you 30 | these rights or asking you to surrender the rights. Therefore, you have 31 | certain responsibilities if you distribute copies of the software, or if 32 | you modify it: responsibilities to respect the freedom of others. 33 | 34 | For example, if you distribute copies of such a program, whether 35 | gratis or for a fee, you must pass on to the recipients the same 36 | freedoms that you received. You must make sure that they, too, receive 37 | or can get the source code. And you must show them these terms so they 38 | know their rights. 39 | 40 | Developers that use the GNU GPL protect your rights with two steps: 41 | (1) assert copyright on the software, and (2) offer you this License 42 | giving you legal permission to copy, distribute and/or modify it. 43 | 44 | For the developers' and authors' protection, the GPL clearly explains 45 | that there is no warranty for this free software. For both users' and 46 | authors' sake, the GPL requires that modified versions be marked as 47 | changed, so that their problems will not be attributed erroneously to 48 | authors of previous versions. 49 | 50 | Some devices are designed to deny users access to install or run 51 | modified versions of the software inside them, although the manufacturer 52 | can do so. This is fundamentally incompatible with the aim of 53 | protecting users' freedom to change the software. The systematic 54 | pattern of such abuse occurs in the area of products for individuals to 55 | use, which is precisely where it is most unacceptable. Therefore, we 56 | have designed this version of the GPL to prohibit the practice for those 57 | products. If such problems arise substantially in other domains, we 58 | stand ready to extend this provision to those domains in future versions 59 | of the GPL, as needed to protect the freedom of users. 60 | 61 | Finally, every program is threatened constantly by software patents. 62 | States should not allow patents to restrict development and use of 63 | software on general-purpose computers, but in those that do, we wish to 64 | avoid the special danger that patents applied to a free program could 65 | make it effectively proprietary. To prevent this, the GPL assures that 66 | patents cannot be used to render the program non-free. 67 | 68 | The precise terms and conditions for copying, distribution and 69 | modification follow. 70 | 71 | TERMS AND CONDITIONS 72 | 73 | 0. 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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 | # GENESIS2PCE 2 | 3 | This adapter PCB allows connecting Genesis 3 or 6 button controllers to a PC Engine console. 4 | It consists of all the components a real PC Engine 6 button controller has + an Atmega328p for interfacing with Genesis controllers. 5 | When connecting a Genesis 6 button controller without holding the Mode button, the adapter will go into 6 button mode. 6 | This means you can use it as an actual 6 button PC Engine adapter for the handful of games that support it (Street Fighter 2, Art of Fighting, Fatal Fury 2 etc.). 7 | To ensure compatiblity with other games and the Sega Genesis 6 button controller, one should hold the Mode button while powering on the adapter to put the controller into 3 button mode and the adapter into 2 button mode. Sega Genesis 3 button controllers will always put the adapter into 2 button mode. 8 | 9 | Which mode the adapter is currently in, is represented by the onboard LED. 10 | 11 | | LED on | LED off | 12 | |--|--| 13 | | 6 button mode | 2 button mode | 14 | 15 | # File structure 16 | - Gerber files can be found in the Gerber directory 17 | - BOMs can be found in the BOM directory 18 | - Hex files for flashing the Atmega328p can be found in the Hex directory 19 | - Project source can be found in the GENESIS2PCE directory 20 | 21 | # Images 22 | ![PCB](https://github.com/Infinest/GENESIS2PCE/blob/master/Images/boardv3.jpg) 23 | 24 | ![PHOTO](https://github.com/Infinest/GENESIS2PCE/blob/master/Images/boardv3_real.jpg) 25 | 26 | # Mapping 27 | | PC Engine | Sega Genesis 3 button | Sega Genesis 6 button| 28 | |--|--|--| 29 | | Up | Up | Up | 30 | | Down| Down | Down | 31 | | Left| Left | Left | 32 | | Right| Right | Right | 33 | | Select | Start / A | Start / Mode| 34 | | Run | A / Start | Mode / Start | 35 | | I | C | C | 36 | | II | B | B | 37 | | III |--| A | 38 | | IV |--| X | 39 | | V |--| Y | 40 | | VI |--| Z | 41 | 42 | The button assignments for Select and Run can be swapped. To do this, simply hold A, B, C & Start on your connected Genesis controller for 8 seconds. This configuration will be retained through power cycles. 43 | 44 | # Flashing the Atmega328p 45 | 46 | The hex files for flashing the Atmega328p are available inside the Hex directory. 47 | The Atmega328p's fuse bytes should be set to the following values: 48 | | Fuse Byte | Value | 49 | |--|--| 50 | |Fuse Low Byte| 0xDF | 51 | |Fuse High Byte| 0xFE | 52 | |Extended Fuse Byte| 0xFC | 53 | 54 | # References 55 | Very helpful information on how to read Genesis controllers was gathered from these sources: 56 | * https://github.com/jonthysell/SegaController 57 | * https://segaretro.org/Six_Button_Control_Pad_(Mega_Drive)#Technical_information 58 | --------------------------------------------------------------------------------