3 open source boards using the TMS9900

Real designs built with the TMS9900, 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 TMS9900 in open source designs

The gallery holds 3 open source boards using the TMS9900 from 3 GitHub repositories; a typical one measures about 244 × 224.3 mm and carries around 242 components.

67% use four copper layers or more, and 0% carry an open source license.

The most starred is TI99 22 by danwerner21.

Parts used alongside the TMS9900

Microcontrollers on boards using the TMS9900

ESP32 1

What boards using the TMS9900 are built for

TMS9900: common questions

Where can I find a TMS9900 reference design?

Each of the 3 boards on this page is a real design using the TMS9900. 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 TMS9900?

The 27C64, 74LS00, 74LS03, 74LS04 and 74LS08 appear in the most repositories here.

Which microcontrollers do boards using the TMS9900 use?

Most are built on ESP32 (1).

How big is a typical board using the TMS9900?

The median is 244 × 224.3 mm, and 33% are two-layer designs.

What is the most popular open source board using the TMS9900?

By GitHub stars, TI99 22 by danwerner21, with 50 stars.

Can I simulate one of these boards using the TMS9900 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.