2 open source boards using the Z80PIO

Real designs built with the Z80PIO, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.

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The Z80PIO in open source designs

The gallery holds 2 open source boards using the Z80PIO from 2 GitHub repositories; a typical one measures about 170 × 145 mm and carries around 113 components.

100% are two-layer designs, the rest use four layers or more, and 50% carry an open source license.

The most starred is Multicomp6809 by nealcrook.

Parts used alongside the Z80PIO

What boards using the Z80PIO are built for

Retro computing 1

Z80PIO: common questions

Where can I find a Z80PIO reference design?

Each of the 2 boards on this page is a real design using the Z80PIO. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.

What parts are used alongside the Z80PIO?

The 74HCT10, 74HCT123, 74HCT244, 74LS06 and 74LS174 appear in the most repositories here.

How big is a typical board using the Z80PIO?

The median is 170 × 145 mm, and 100% are two-layer designs.

What is the most popular open source board using the Z80PIO?

By GitHub stars, Multicomp6809 by nealcrook, with 63 stars.

Can I simulate one of these boards using the Z80PIO before building it?

Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.