cr1901 changed the topic of ##yamahasynths to: Channel dedicated to questions and discussion of Yamaha FM Synthesizer internals and corresponding REing. Discussion of synthesis methods similar to the Yamaha line of chips, Sound Blasters + clones, PCM chips like RF5C68, and CD theory of operation are also on-topic. Channel logs: https://libera.irclog.whitequark.org/~h~yamahasynths
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<andlabs> yep it's more amiga questions time with andlabs, and this time one I'm actually stiymied on and need help with https://twitter.com/pgandlabs/status/1401637274316677137
<Nerionaya> there's no reason you would attach RAM to a YM2203 right
<andlabs> no
<andlabs> unless you can somehow make the signals look right
<Nerionaya> okay that's what I figured; there's a RAM chip on this arcade board I'm looking at and I can't figure out what it's for in the mess of vias under chips and discrete logic, but it's right next to a YM2203 lol
<andlabs> well then it's time to trace the layout =P
<andlabs> what board is this
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<Nerionaya> Sky Soldiers; the same board with the mysterious censored chip https://twitter.com/nicole_express/status/1401368732509872129
<Nerionaya> ahhh I think this is the fixed layer
<Nerionaya> what's it doing with the sound chip
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<andlabs> check MAME I guess?
<andlabs> the source, I mean
<Nerionaya> oh trust me MAME's source has been great here
<Nerionaya> I actually figured out what this was using process of elimination and the game's own hardware test lol