5 open source boards using the W65C02S
Real designs built with the W65C02S, 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.
RP2040/RP2350Mega IIe
baldengineer
163 × 174.4 mm307 parts4LMIT33
RP2040/RP2350Econopet
DLehenbauer
262.5 × 108 mm284 parts2LCC0-1.018
RP2040/RP2350Commodore pet clone
262.5 × 108 mm258 parts2LCC0-1.013
PIC6502-CRAB-APPLE
gcswales
69.9 × 74.3 mm19 parts2LGPL-3.09
Gd MEGA-65c02 proto
98.8 × 100 mm56 parts4LMIT33
The W65C02S in open source designs
The gallery holds 5 open source boards using the W65C02S from 4 GitHub repositories; a typical one measures about 163 × 107.9 mm and carries around 258 components.
60% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is Mega IIe by baldengineer.
Parts used alongside the W65C02S
Microcontrollers on boards using the W65C02S
What boards using the W65C02S are built for
W65C02S: common questions
Where can I find a W65C02S reference design?
Each of the 5 boards on this page is a real design using the W65C02S. 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 W65C02S?
The RP2040, W25Q128JVS, 74LS145, 74LS245 and AS6C1008 appear in the most repositories here.
Which microcontrollers do boards using the W65C02S use?
Most are built on RP2040/RP2350 (3) and PIC (1).
How big is a typical board using the W65C02S?
The median is 163 × 107.9 mm, and 60% are two-layer designs.
What is the most popular open source board using the W65C02S?
By GitHub stars, Mega IIe by baldengineer, with 33 stars.
Can I simulate one of these boards using the W65C02S 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.