The 1-Bit Forum — GTIA trick on Atari ST?

Re: GTIA trick on Atari ST?

null@example.com (garvalf) — Fri, 11 Nov 2016 13:06:49 +0000

it's connected both to the audio out and to the modulator, so I don't know to what extend it's possible to drive a signal to the audio output this way. I know almost nothing about all this so I can't really tell, it's just a guess.

Re: GTIA trick on Atari ST?

null@example.com (utz) — Fri, 11 Nov 2016 10:14:02 +0000

Hmm, interesting. As far as I understand the schematics (read: not very far), it might only affect RF out, though?

Re: GTIA trick on Atari ST?

null@example.com (garvalf) — Mon, 07 Nov 2016 08:40:15 +0000

I thought on the Atari ST the ym2149 handles all alone the audio output, but now I see on an Atari ST schematics that some video and modulator stuff are connected to the audio out, so why not?

GTIA trick on Atari ST?

null@example.com (utz) — Sat, 05 Nov 2016 19:27:11 +0000

So I was wondering, would it be possible to apply the GTIA method from Atari 8-bit to the 16-bitters somehow? Ie. produce sound without using YM or DMA sound? Any ideas?