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, CD/floppy disk theory of operation, and the 68k CPU are also on-topic. Channel logs: https://libera.irclog.whitequark.org/~h~yamahasynths
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<Lord_Nightmare>
fseidel: it definitely does do this. I believe nukeykt found this, and plgdavid verified it
<Lord_Nightmare>
it ONLY works in the debug mode.
<Lord_Nightmare>
also, the drum channel is trying to play, even on the vrc7, but the drum dac output doesn't connect anywhere.
<Lord_Nightmare>
its not connected to a pin, the trace just ends
<Lord_Nightmare>
the vrc7 die and the ym2413 die are about 85% the same, vrc7 just has a big extra block for the mapper circuitry (and presumably for the test mode stuff)
<ZrX_NoMs>
Anyone ever seen 28-pin hard drive interface?
<ZrX_NoMs>
Custom ST-506
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<andlabs>
then the wikipedia blurb should have a citation
<tunixman>
ooooh the st-506!
<ZrX_NoMs>
After probing the connector there are 8 inputs and 7 outputs. Connected to two custom Fujitsu ICs with 0 information online.
<tunixman>
"...$4,308 in today's dollars..."
<tunixman>
Basical $1k/MB.
<andlabs>
is tis drive from an IBM PS/2 by any chance
<andlabs>
that's the only computer I can think of that uses a nonstandard HDD connector