4 ms·
How do you design Atari 2600 clones? Do you have to replicate the TIA?
by djmips 6mo ago
How do you design Atari 2600 clones? Do you have to replicate the TIA?
- drzaiusx11 6mo agoYes, although there are a number of ways to "cheat" aside from just pulling chips...
- drzaiusx11 6mo agoApparently my terse sister comment is beyond the edit timeout threshold, I had meant to follow up with more details. If there's interest around general "chip emulation" techniques I've employed, I could try and do a blog write-up. The first attempt was using a PIC32 with a bunch of lookup tables a couple decades ago. Then I played with fpgas (the cheap lattice ones.) My latest attempts relied on a combination of SoC and inline rom dumps using all the known bank switching schemes, which tbh was a pita to validate until I finally bought a harmony cart (I was eproming up until a decade ago.) The SoC design allowed me to use a ARM that could output HDMI (via daughter board) with various filters to mimic CRTs artifacts and the like which I found fun.