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
<fseidel_>
ValleyBell: cool, that makes sense. I wonder why it wasn't more common...
<NiGHTS>
Dynamite Headdy - Dark Demon's Song (Extended) - YouTube
<fseidel>
you've got a secret bonus point!
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<cr1901>
fseidel: Honestly, that music has been giving me motivation to fix my computer lol (Idk if you saw, but Windoze decided to die and I had to install Windoze to a new drive)
<fseidel>
my condolences :(
<cr1901>
It's not as bad as you may think. 2020-me wrote a "So Windows Died Painfully. This Is What To Do Next." guide. Was worth the effort.
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<ValleyBell>
fseidel: Buffering is pretty complicated when you combine that with 2 channels and 4-bit DPCM compression.
<ValleyBell>
IIRC Treasure's Z80 PCM driver looked really messy. It has been a while since I looked into it though and I never dug deep into it.
<ValleyBell>
I guess most developers just went with something simple that works.
<ValleyBell>
Ristar would really have benefited from buffering though. Their 2-channel PCM driver switches banks twice (1x per channel) during every iteration of the stream loop.
<ValleyBell>
and bank switching on the MegaDrive just eats CPU cycles, as you have to write 9 bits separately into a shift register
<ValleyBell>
It seems like PCM buffering was done only in very few cases on the MD though.
<ValleyBell>
GEMS does it as well. (GEMS also uses FM Timer A to get a consistent PCM sample rate, even though it's 5-10 KHz only.)
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<NiGHTS>
Cathode Ray Dude sur Twitter : "Oh man, got a GREAT email. A viewer with access to x-ray gear (who declined to be credited) imaged a Flashpath disk!… "
<NiGHTS>
foone sur Twitter : "I also imaged track 0 of a FlashPath disk, which is deep weird. You've got the same contents on the top and bottom, and it's just the same sectors over and over again. This is because FlashPath disks are not disks.… https://t.co/Qksy4wUhfn"
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<andlabs>
I legitimately don't understnad how this works without a custom driver
<andlabs>
sector 0 means something very specific to a floppy disk on windows
<andlabs>
formatted with FAT
<andlabs>
wait it does use a driver
<andlabs>
crd completely misrepresented this then
<tunixman>
Yeah, I think it uses a custom driver that makes it look like a serial device. (small s, not UART RS232 Serial).