
8-Bit CPU 32k
slu4coder/Minimal-64x4-Home-Computer
My DIY TTL home computer with VGA and PS/2 and 4x the processing power of a Commodore C64 or Apple II.

Buffer PCB is an open-source printed circuit board by abzman, from the abzman/cypress-logic-analyser-buffer repository on GitHub, published under the Unlicense licence. It is a 2-layer board of 45.9 × 52.4 mm with 28 parts on 69 nets, routed with 262 tracks and 22 vias.
It is built around the 74HC245D. Its parts include 16 resistors, 4 connectors, 2 capacitors and 2 ICs.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 100R | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16 |
| 2 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 74HC245 | Package_DIP:DIP-20_W7.62mm | U1, U2 |
| 2 | Conn_01x09 | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Horizontal | J2, J3 |
| 2 | Conn_02x10_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x10_P2.54mm_Vertical | J1, J4 |
| 1 | LOGO | Evan's misc parts:Evan Logo | G*** |
| 1 | LOGO | Evan's misc parts:OSHW gear | G*** |
The 26 most common of 28 parts.
It measures 45.9 × 52.4 mm and has 2 copper layers, 1.6 mm thick.
28 parts, built around the 74HC245D. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the abzman/cypress-logic-analyser-buffer repository on GitHub, at the commit this page was made from: the board is buffer PCB/buffer PCB.kicad_pcb and its schematic buffer PCB/buffer PCB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the Unlicense licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

slu4coder/Minimal-64x4-Home-Computer
My DIY TTL home computer with VGA and PS/2 and 4x the processing power of a Commodore C64 or Apple II.

slu4coder/Minimal-UART-Computer-1-2
Legacy: Version 1 and 2 of my TTL-only CPU featuring UART I/O, an expansion port, 512KB SSD at up to 10MHz clock speed

crmaykish/mackerel-68k
A series of single-board Motorola 68k computers with support for modern Linux

slu4coder/Minimal-64-Home-Computer
Legacy: Full TTL-only home computer with VGA and PS/2 and twice the processing power of a Commodore 64
Pixelvation/Pixelvation
This GitHub repository is the current home of Pixelvation and will be updated whenever there's some significant new development.

Board-Folk/MegaCD-Main-BD
Reproductions of main board PCBs for Sega's Mega CD/Sega CD add-on for the Mega Drive/Genesis console.


slu4coder/Minimal-UART-Computer-3
Version 3 of my educational DIY TTL computer built around a UART serial interface - now with blinkenlights!