Multi
About the Multi PCB
Multi is an open source PCB design by homebrew8088, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 184.2 × 219.2 mm, with 92 components from 28 distinct parts.
Other key parts include the 74LS139, 74LS245, 33 ohm, 74LS138 and 8284. By type, the board carries 34 capacitors, 19 connectors, 19 resistors, 14 ICs, 1 crystal and 1 switch.
From the project
8086 PC Compatible
This is a repository for my 8086 PC Compatible project developed in 2021. The Motherboard is built to be generally PC XT/AT compatible.\ \ THIS DOES NOT WORK CORRECTLY FOR REFERENCE ONLY
https://www.homebrew8088.com \ http://www.ebay.com/sch/emil6190/m.html
Features:\ -8086, NEC V30\ -512k RAM (This can be changed)\ -16 Bit ISA Slots\ -PC Speaker\ -USB "Hard Drive"\ -PS/2 Keyboard\ -ATX form factor\ -Add on DMA controller (Has not been built)
Main components on the Multi
Multi bill of materials (BOM)
92 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 74LS139 | DIP-16_W7.62mm | U1, U17, U117 |
| 1 | 74LS245 | DIP-20_W7.62mm | U2 |
| 1 | 33 ohm | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | U3 |
| 3 | 74LS138 | DIP-16_W7.62mm | U9, U12, U13 |
| 1 | 8284 | DIP-18_W7.62mm | U11 |
| 1 | 74LS74 | DIP-14_W7.62mm | U14 |
| 1 | 74LS573 | DIP-20_W7.62mm | U15 |
| 1 | 74LS04 | DIP-14_W7.62mm | U16 |
| 1 | 82C42/83C42 | PLCC-44_THT-Socket | U19 |
| 1 | 74LS07 | DIP-14_W7.62mm | U20 |
| 1 | 14.31818 MHz | Crystal_HC18-U_Vertical | Y2 |
| 7 | Bus_ISA_8bit | 8-bit-ISA | J1, J7, J8, J9, J12, J13, J14 |
| 1 | Mini-DIN-6 | 6_PIN_DIN | J2 |
| 1 | SPK | PinHeader_1x04_P2.54mm_Vertical | J3 |
| 7 | Conn_02x18_Counter_Clockwise | 2x18_PIN_EDGE_CARD | J4, J15, J16, J17, J18, J19, J20 |
| 1 | PWR ON | PinHeader_1x02_P2.54mm_Vertical | J6 |
| 2 | Conn_02x08_Counter_Clockwise | 2x08_PIN_EDGE_CARD | J10, J11 |
| 1 | PWR SW | 6 PIN DTDP | 8x8mm1 |
| 1 | Conn_02x12_Top_Bottom | 24_PIN_ATX_POWER | ATXPOWER1 |
| 1 | PORT 0XE0 | PinHeader_2x08_P2.54mm_Vertical | CH376 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RESET | SW_PUSH_6mm | SW1 |
| 1 | POWER | LED_D3.0mm | D1 |
| 34 | 0.1uF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +26 |
| 3 | 510 ohm | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R4 |
| 4 | 27 ohm | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R14, R17, R18 |
| 7 | 10k ohm | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5, R6, R7, R8, R9, R12, R13 |
| 3 | 10K ohm | R_Array_SIP4 | RN1, RN3, RN4 |
| 2 | 10K ohm | R_Array_SIP9 | RN2, RN5 |
Multi design files
The KiCad project lives in the homebrew8088/8086-PC-Compatible repository on GitHub; these links point at the commit this page was built from.
Multi: common questions
How big is the Multi PCB?
The Multi measures 184.2 × 219.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Multi?
92 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the Multi design files?
From the homebrew8088/8086-PC-Compatible repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Multi design in my own project?
Yes, under the terms of its GPL-3.0 license, which homebrew8088 chose for the repository.
