512k
About the 512k PCB
512k is an open source PCB design by homebrew8088, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 203.4 × 73.9 mm, with 24 components from 7 distinct parts.
Other key parts include the 62256, 28C256, AS6C4008, 74LS139 and 74LS138. By type, the board carries 12 ICs and 12 capacitors.
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 512k
512k bill of materials (BOM)
24 components, 7 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 62256 | DIP-28_W15.24mm | U1, U8 |
| 2 | 28C256 | DIP_Socket-28_W11.9_W12.7_W15.24_W17.78_W18.5_3M_228-1277-00-0602J | U2, U6 |
| 2 | AS6C4008 | DIP-32_W15.24mm | U3, U9 |
| 3 | 74LS139 | DIP-16_W7.62mm | U4, U7, U12 |
| 2 | 74LS138 | DIP-16_W7.62mm | U5, U10 |
| 1 | 74LS125 | DIP-14_W7.62mm | U11 |
| 12 | 0.1uF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +4 |
512k 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.
512k: common questions
How big is the 512k PCB?
The 512k measures 203.4 × 73.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 512k?
24 components, from 7 distinct parts. The full bill of materials is listed on this page.
Where can I download the 512k 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 512k design in my own project?
Yes, under the terms of its GPL-3.0 license, which homebrew8088 chose for the repository.
