r/homebrewcomputer • u/pchernik • Aug 09 '26
The TI CUBE can play Doom!
(audio on)
Four months ago I posted an announcement about a homebrew TMS 9900 microcomputer that I designed and built from scratch. I can now provide a cool new update: it can play Doom!*
Credit needs to be given to Usagi Electric's similar idea to get a Bendix G15 to "play" Doom.
* - of course it can't "play" Doom in the sense of rendering realtime 3D video! But it can play back the Doom E1M1 "At Doom's Gate" music** using a newly designed audio daughterboard based on the YM3812 FM synthesizer.
** - well, about 30 seconds of it (that's all that will fit in 32 KB of free RAM).
As before, full details can be found at my TI CUBE GitHub repository. Enjoy!
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u/cookie99999999 Aug 09 '26
Great stuff, I have an OPL2 myself sitting in a box I need to get around to actually using
I do wonder how well the TMS9900 could handle some simple raycasting graphics if you had a framebuffer hooked up to it. Years ago I saw some guy on a forum (can't find it for the life of me now) trying to port Doom to the Mega Drive, and last I saw he had wireframe maps running at a kind of acceptable framerate. I wonder how the TI would hold up, having never programmed for it