├── doku └── m396f.pdf ├── gerber └── m396f.zip ├── images ├── backside.jpg ├── blank_pcb.jpg ├── build_complete.jpg └── mounting_holes.jpg ├── bom └── M396F_V2.7.txt └── README.md /doku/m396f.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marco-Both/M396F-Replika/HEAD/doku/m396f.pdf -------------------------------------------------------------------------------- /gerber/m396f.zip: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marco-Both/M396F-Replika/HEAD/gerber/m396f.zip -------------------------------------------------------------------------------- /images/backside.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marco-Both/M396F-Replika/HEAD/images/backside.jpg -------------------------------------------------------------------------------- /images/blank_pcb.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marco-Both/M396F-Replika/HEAD/images/blank_pcb.jpg -------------------------------------------------------------------------------- /images/build_complete.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marco-Both/M396F-Replika/HEAD/images/build_complete.jpg -------------------------------------------------------------------------------- /images/mounting_holes.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Marco-Both/M396F-Replika/HEAD/images/mounting_holes.jpg -------------------------------------------------------------------------------- /bom/M396F_V2.7.txt: -------------------------------------------------------------------------------- 1 | * Name;Value 2 | * 3 | BAT;Battery 4 | C1;10uF 25V RM2,5 5 | C2;10uF 25V RM2,5 6 | C4;10uF 25V RM2,5 7 | C9;10uF 25V RM2,5 8 | C10;100nF 9 | C11;30pF 10 | C12;47pF 11 | C13;30pF 12 | C14;10uF 25V RM2,5 13 | C15;47pF 14 | C16;4,7nF 15 | C17;100nF 16 | C18;10uF 25V RM2,5 17 | C20;100nF 18 | C22;100nF 19 | C28;10uF 25V RM2,5 20 | C29;10uF 25V RM2,5 21 | C32;100nF 22 | C33;100nF 23 | C34;10uF 25V RM2,5 24 | C36;30pF 25 | C37;10uF 25V RM2,5 26 | C38;30pF 27 | C40;10uF 25V RM2,5 28 | C43;100nF 29 | C44;10uF 25V RM2,5 30 | C45;100nF 31 | C46;10uF 25V RM2,5 32 | C47;100nF 33 | C48;10uF 25V RM2,5 34 | C50;100nF 35 | C51;nc 36 | C52;nc 37 | C53;nc 38 | C54;nc 39 | C55;nc 40 | C56;nc 41 | C57;nc 42 | C58;nc 43 | C59;nc 44 | C60;nc 45 | C61;nc 46 | C62;nc 47 | C63;nc 48 | C64;nc 49 | C65;100pF 50 | C66;47pF 51 | CXX;220pF 52 | D1;1N4148 53 | D2;1N4148 54 | J2;16 Bit ISA 55 | J3;16 Bit ISA 56 | J4;16 Bit ISA 57 | J5;16 Bit ISA 58 | J6;16 Bit ISA 59 | J7;16 Bit ISA 60 | J8;AT Power 61 | JP1;EXT-BAT 62 | JP2;Display type select 63 | JP3;POW LED / KEY LOCK 64 | JP4;SPEAKER 65 | JP5;TB LED 66 | JP6;TB SW 67 | JP7;RESET 68 | JP8;CPU Clock select 69 | JP9;CPU Clock select 70 | JP10;CPU Clock select 71 | L1;0 72 | L2;0 73 | Q1;3906 74 | Q2;3904 75 | Q3;3904 76 | R2;10K 77 | R3;10K 78 | R4;10K 79 | R5;51K 80 | R6;1K 81 | R7;220 82 | R8;470 83 | R9;10K 84 | R10;10K 85 | R11;2M 86 | R12;1M 87 | R13;330 88 | R14;4,7K 89 | R15;4,7K 90 | R16;4,7K 91 | R17;56 92 | R18;56 93 | R19;10K 94 | R20;22 95 | R21;10K 96 | R22;4,7K 97 | R23;470 98 | R24;1M 99 | R25;22 100 | R26;470 101 | R27;150 102 | R28;330 103 | R29;10K 104 | R30;10K 105 | R31;1K 106 | RP1;4,7K, Sternschaltung, 8Wid./9Pins 107 | RP2;4,7K, Sternschaltung, 8Wid./9Pins 108 | RP3;330, Sternschaltung, 8Wid./9Pins 109 | RP4;10, Parallelschaltung, 4Wid./8Pins 110 | RP5;10, Parallelschaltung, 4Wid./8Pins 111 | RP6;10, Parallelschaltung, 4Wid./8Pins 112 | RP7;100, Parallelschaltung, 4Wid./8Pins 113 | U1;SARC 6042, VT82C42N, Amikey2, KB-BIOS VER F 114 | U2;74HC05AP 115 | U3;BIOS 116 | U4;W85C168, MC146818, DS12887, CDP6818E, HM6818 117 | U5;TC4069UBP 118 | U6;PLL52C05S, TK9107-2, ICW42C07 119 | U7;386SX or CX486SLC 25/33/40 MHZ, 486SLC2-50 MHZ 120 | U8;80387SX coprocessor 121 | U9;SARC RC2016A5 122 | U10;RAM 123 | U11;RAM 124 | U12;RAM 125 | U13;RAM 126 | X1;32,768 kHz 127 | X2;14,31818 MHz 128 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # M396F V2.7 2 | 3 | Replica of a 386SX Mainboard 4 | 5 | # PCB Revision History 6 | 7 | - V0.1 Initial revision 2022 made with Sprint-Layout 8 | - V0.2 Silkscreen updated, component positions and mounting holes modified 9 | - V0.3 fix 5V bug on J7, add alternative to U6 10 | 11 | # Specs 12 | 13 | This replica of a 386SX motherboard is based on the SARC RC2016A chipset. Supported are 386SX or CX486SLC 25/33/40 MHz CPUs. A socket for the optional 80387SX coprocessor is available. The RAM reaches from 512kb to 16MB. I recommend faster 60ns RAM. 14 | The manual, jumper settings and useful downloads can be found here https://theretroweb.com/motherboards/s/pcchips-m396f-ver.2.6#downloads 15 | 16 | # Images 17 | 18 | Top view 19 | [![](images/build_complete.jpg 'top view')](#topview) 20 | 21 | blank PCB 22 | [![](images/blank_pcb.jpg 'blank pcb')](#blank) 23 | 24 | # Bill of materials 25 | 26 | [![](bom/M396F_V2.7.txt 'bom')](#bom) 27 | 28 | | Quantity | Description | PCB/Schematic's Reference | 29 | | -------- | ------------------------------------------------------------ | ---------------------------------------------------------------- | 30 | | 4 | CAP CER 30 pF RM 5,0 | C11, C13, C36, C38 | 31 | | 3 | CAP CER 47 pF RM 5,0 | C12, C15, C66 | 32 | | 1 | CAP CER 220 pF | CXX (Backside see notice) | 33 | | 1 | CAP CER 4,7 nF RM 5,0 | C16 | 34 | | 1 | CAP CER 100 pF nF RM 5,0 | C65 | 35 | | 10 | CAP CER 100 nF RM 5,0 | C10, C17, C20, C22, C32, C33, C43, C45, C47, C50 | 36 | | 14 | CAP ELKO 10 uF 25V RM 2,5 | C1, C2, C4, C9, C14, C18, C28, C29, C34, C37, C40, C44, C46, C48 | 37 | | 2 | DIODE 1N4148 | D1, D2 | 38 | | 6 | 16 Bit ISA Socket | J2, J3, J4, J5, J6, J7 | 39 | | 1 | AT Power connector | J8 | 40 | | 1 | Battery | BAT | 41 | | 1 | CON 4 PIN | JP1 external Battery | 42 | | 1 | CON 2 PIN | JP2 Display type | 43 | | 1 | CON 5 PIN | JP3 Power LED / Key lock | 44 | | 1 | CON 4 PIN | JP4 Speaker | 45 | | 1 | CON 2 PIN | JP5 Turbo LED | 46 | | 1 | CON 2 PIN | JP6 Turbo switch | 47 | | 1 | CON 2 PIN | JP7 Reset switch | 48 | | 3 | CON 3 PIN | JP8, JP9, JP10 CPU clock select | 49 | | 1 | 3906 | Q1 | 50 | | 2 | 3904 | Q2, Q3 | 51 | | 2 | RES 0 Ohm 5% 1/4W | L1, L2 | 52 | | 2 | RES 22 Ohm 5% 1/4W | R20, R25 | 53 | | 2 | RES 56 Ohm 5% 1/4W | R17, R18 | 54 | | 1 | RES 150 Ohm 5% 1/4W | R27 | 55 | | 1 | RES 220 Ohm 5% 1W | R7 | 56 | | 2 | RES 330 Ohm 5% 1/4W | R13, R28 | 57 | | 3 | RES 470 Ohm 5% 1W | R8, R23, R26 | 58 | | 2 | RES 1 k Ohm 5% 1/4W | R6, R31 | 59 | | 4 | RES 4,7 k Ohm 5% 1/4W | R14, R15, R16, R22 | 60 | | 9 | RES 10 k Ohm 5% 1/4W | R2, R3, R4, R9, R10, R19, R21, R29, R30 | 61 | | 1 | RES 51 k Ohm 5% 1/4W | R5 | 62 | | 2 | RES 1 M Ohm 5% 1/4W | R12, R24 | 63 | | 1 | RES 2 M Ohm 5% 1/4W | R11 | 64 | | 2 | RES Network 4,7 k Ohm bussed | RP1, RP2 | 65 | | 1 | RES Network 330 Ohm bussed | RP3 | 66 | | 3 | RES Network 10 Ohm parallel | RP4, RP5, RP6 | 67 | | 1 | RES Network 100 Ohm parallel | RP7 | 68 | | 1 | IC SARC 6042, VIA VT82C42N, Amikey2, KB-BIOS VER F | U1 | 69 | | 1 | IC 74HC05AP | U2 | 70 | | 1 | IC BIOS | U3 | 71 | | 1 | IC W85C168, MC146818, DS12887, CDP6818E, HM6818 | U4 | 72 | | 1 | IC TC4069UBP | U5 | 73 | | 1 | IC PLL52C05S, TK9107-2, ICW42C07 see U6 note for alternative | U6 | 74 | | 1 | IC CPU | U7 | 75 | | 1 | IC Coprocessor | U8 | 76 | | 1 | IC SARC RC2016A5 | U9 | 77 | | 4 | IC RAM (60ns) | U10, U11, U12, U13 | 78 | | 1 | Quarz 32,768 kHz | X1 | 79 | | 1 | Quarz 14,31818 MHz | X2 | 80 | 81 | # Notice 82 | 83 | Backside position CXX (CAP CER 220 pF axial or 0805 SMD) 84 | [![](images/backside.jpg 'backside')](#backside) 85 | 86 | # U6 87 | 88 | As an alternative to U6, a DIP-14 crystal oscillator can be used. JP9 and JP10 are not populated for this. 89 | 90 | With the DIP-14 oscillator, pin 1 of the oscillator (the sharp edge) is connected to the hole to the left of JP10. Pin 7 of the oscillator is connected to pin 1 of JP9 (ground) and pin 8 (output) is connected to the hole to the right of JP9. Pin 14 of the oscillator (VCC) is connected to pin 3 of JP10. 91 | 92 | # Mounting holes 93 | 94 | This board uses the mounting holes marked in green. Modern AT cases often only have the red marked holes. 95 | 96 | [![](images/mounting_holes.jpg 'mounting_holes')](#mounting_holes) 97 | 98 | # Licence 99 | 100 | The project is free for non-commercial reproduktion. Do not sell it on ebay or other platforms for profit. Do not make a closed source. Share your experiences and ideas with the community. 101 | --------------------------------------------------------------------------------