4 open source boards using the TMS9928A
Real designs built with the TMS9928A, 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.
TMS9918-9928
polpo
20.3 × 51.1 mm13 parts2LCERN-OHL-P-2.023- schematic only · 85 parts
TI99-Motherboard
rkrenicki
85 partsNo license20 
Coleco original
sparkletron
168.4 × 214 mm218 parts2LMIT16
Coleco original main only
168.4 × 214 mm182 parts2LMIT16
The TMS9928A in open source designs
The gallery holds 4 open source boards using the TMS9928A from 3 GitHub repositories; a typical one measures about 168.4 × 214 mm and carries around 134 components.
100% are two-layer designs, the rest use four layers or more, and 75% carry an open source license.
The most starred is TMS9918-9928 by polpo.
TMS9928A: common questions
Where can I find a TMS9928A reference design?
Each of the 4 boards on this page is a real design using the TMS9928A. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
How big is a typical board using the TMS9928A?
The median is 168.4 × 214 mm, and 100% are two-layer designs.
What is the most popular open source board using the TMS9928A?
By GitHub stars, TMS9918-9928 by polpo, with 23 stars.
Can I simulate one of these boards using the TMS9928A 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.