2 layers101.6 × 101.3 mm
8-bit computer General Registers pcb
xrayer2000/8-bit-computer-Documentation
My 8-bit computer
75 parts30
2 layers
8-bit computer Buss
xrayer2000/8-bit-computer-Documentation30My 8-bit computer
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 113
- Nets
- 65
- Pads
- 553
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20171130)
- Created
- 17 Feb 2020
- Updated
- 17 Jun 2025
Overview
8-bit computer Buss is an open-source printed circuit board by xrayer2000, from the xrayer2000/8-bit-computer-Documentation repository on GitHub. It is a 2-layer board with 113 parts on 65 nets.
It is built around the 74LS245SC. Its parts include 44 resistors, 44 diodes, 12 switches, 8 connectors and 5 ICs. It belongs with the retro computing and games boards of this library.
Main components
1README
README.mdLICENSE
README
This project is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).
You are free to:
- Share (copy and redistribute the material in any medium or format)
- Adapt (remix, transform, and build upon the material)
Under the conditions that:
- You must give appropriate credit.
- You may not use the material for commercial purposes.
For full license details, see:
https://creativecommons.org/licenses/by-nc/4.0/
Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
Copyright (c) 2025 Emil
You are free to:
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material
Under the following terms:
- Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made.
- NonCommercial — You may not use the material for commercial purposes.
No additional restrictions — You may not apply legal terms or technological measures that restrict others from doing anything the license permits.
Full license text:
https://creativecommons.org/licenses/by-nc/4.0/legalcode
How to attribute
If you use or adapt this project, please include the following attribution:
“Project name” by Emil is licensed under CC BY-NC 4.0.
https://creativecommons.org/licenses/by-nc/4.0/
Parts
113| Qty | Value | Footprint | References |
|---|---|---|---|
| 44 | LED | LED_THT:LED_D3.0mm | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +28 |
| 23 | R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R4, R21, R22, R23, R24, R25, R29, R30, R31, R32, R33, R37, R38, R39, R40, R41 +7 |
| 20 | 1000 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R26, R27, R28 +4 |
| 9 | SW_DIP_x01 | EG1270:SW_EG1270 | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 |
| 5 | 74LS245 | Package_DIP:DIP-20_W7.62mm | U1, U2, U3, U4, U5 |
| 3 | SW_DIP_x10 | Button_Switch_THT:SW_DIP_SPSTx10_Slide_9.78x27.58mm_W7.62mm_P2.54mm | SW10, SW11, SW12 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R9 |
| 1 | ALU | Connector_IDC:IDC-Header_2x13_P2.54mm_Vertical | J2 |
| 1 | Bot Loader | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J5 |
| 1 | Clock | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J8 |
| 1 | Control Matrix | Connector_IDC:IDC-Header_2x20_P2.54mm_Vertical | J7 |
| 1 | General Registers | Connector_IDC:IDC-Header_2x10_P2.54mm_Vertical | J1 |
| 1 | Input module | Connector_IDC:IDC-Header_2x17_P2.54mm_Vertical | J6 |
| 1 | PC and Stack pointer register | Connector_IDC:IDC-Header_2x08_P2.54mm_Vertical | J3 |
| 1 | RAM | Connector_IDC:IDC-Header_2x17_P2.54mm_Vertical | J4 |
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Questions
What parts does the 8-bit computer Buss use?
113 parts, built around the 74LS245SC. 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.
Where can I download the 8-bit computer Buss KiCad files?
From the xrayer2000/8-bit-computer-Documentation repository on GitHub, at the commit this page was made from: the board is Kicad/8-bit-computer/8-bit computer_Buss/8-bit computer_Buss.kicad_pcb and its schematic Kicad/8-bit-computer/8-bit computer_Boot_loader/8-bit computer_Boot_loader.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 8-bit computer Buss design in my own project?
Its repository states no licence, so its author keeps all rights: ask xrayer2000 before reusing the design.