So, turns out, all the games expect LDR and STR to be implemented incorrectly.

It *should* modify I (I even looked up the actual COSMAC VIP implementation), but if it does, shit breaks.

BLINKY runs. I'm done here. Thousands of others already programmed sound support.

Screw this "console".
Next time, I'll emulate a piece of hardware where all software *doesn't* expect a buggy emulator.
<Mic drop>