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CPU

Bread80·CPCModular·CPU/CPU.kicad_pcb

CPU PCB layout, top view — open source board by Bread80

About the CPU PCB

CPU is an open source PCB design by Bread80, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 99.1 × 65.9 mm, with 28 components from 8 distinct parts.

Other key parts include the Z80CPU and 74LS245. By type, the board carries 16 diodes, 4 capacitors, 4 resistors, 3 ICs and 1 connector.

It belongs with the retro computing designs in this gallery.

From the project

Modular Amstrad CPC Compatible Computer (WiP)

***This project is an unfinished work in progress. It currently has bugs and not all the features have been tested!

The current modules are designed to fit a slightly modified RC2014 Pro backplane. In the text below I shall explain the current status of the project, workarounds needed to get it running and basic build details. Due to the work in progress status of the project this document will be intentionaly terse.

CPU, from the project README
From the project README

Main components on the CPU

Z80CPU74LS245

CPU bill of materials (BOM)

28 components, 8 distinct parts.

QtyPartRefs
1
Z80CPU
IC111
2
74LS245
IC901, IC902
1
MX4 Connector
J1
16
LED
D901, D902, D903, D904, D905, D906, D907, D908 +8
3
100n
C901, C902, C903
1
10uF
C904
2
2k2
R109, R110
2
470
RN901, RN902

CPU design files

The KiCad project lives in the Bread80/CPCModular repository on GitHub; these links point at the commit this page was built from.

CPU: common questions

How big is the CPU PCB?

The CPU measures 99.1 × 65.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CPU?

28 components, from 8 distinct parts. The full bill of materials is listed on this page.

Where can I download the CPU design files?

From the Bread80/CPCModular repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the CPU design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which Bread80 chose for the repository.

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