ChanServ 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://freenode.irclog.whitequark.org/~h~yamahasynths
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<andlabs> Foone: did you see my query
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<cr1901_modern> I am very intrigued, and also worried. Since the images don't show the inductor populated and I have no idea how they're gonna get 12V from a 5V cable otherwise
<andlabs> https://devblogs.microsoft.com/oldnewthing/20210517-00/?p=105217 "It is totally understandable but nonetheless feels weird to me that Windows 95 is considered to be retro-computing."
<ZrX-NoMs> Most often the 12V isn't connected as 3.5" drives other than the very old ones tend to use 5V only.
<andlabs> ah cool someone finally made one of those
<andlabs> ZrX-NoMs: and you can buy berg adapters tha tonly connect 5V
<andlabs> I did by mistake once :D
<andlabs> " FOR 1.44MB FLOPPY DRIVE ONLY. " lol
<andlabs> so this is basically the guts of a USB floppy drive
<andlabs> I retract my "ah cool someone finally made one of those"
<andlabs> would be nice if someone made one of these that followed the USB-MSD or even GPIO instead of USB-FDD so it wasn't artifically limited
<andlabs> and that was commercially made
<andlabs> but whatever I already have mine
<ZrX-NoMs> Best controller is a selfmade controller.
<cr1901_modern> ZrX-NoMs: Fair enough, everybody's doing it (TM) nowadays
<cr1901_modern> Which is actually really cool I think
<cr1901_modern> >andlabs: so this is basically the guts of a USB floppy drive
<cr1901_modern> Oh shit. What if they're scavenging the guts from old USB floppy drives to make these boards?
<whitequark> no
<whitequark> they're buying the ASICs
<cr1901_modern> Oh... indeed :P.
<TD-Linux> usb floppy drives are technically usb mass storage devices
<cr1901_modern> They implement something called UFI, which is 3.5" only (720k, 1.2M, 1.44M)
<cr1901_modern> I can't see why one can't _not_ use UFI tho, at the cost of your drive appearing as A:\ automatically
<TD-Linux> cr1901_modern, I don't see any reason why at least 1.2M wouldn't work with 5.25"
<cr1901_modern> the 1.2M is an NEC Japan format? Idk much about it
<TD-Linux> also afaik you can specify more precise geometries than the predefined list but who knows if that works as no real chip has implemented it
<cr1901_modern> Oh? That's interesting if true :o
<cr1901_modern> I'll have to do some reading
<TD-Linux> it is the same as the IBM format
<TD-Linux> only thing NEC did is use the exact same format and spindle speed on 3.5" as well
<cr1901_modern> So 360rpm
<cr1901_modern> Or "whatever 1.2M IBM uses that's the opposite of the other formats"
<TD-Linux> yes 360rpm
* cr1901_modern had a 50% chance of getting it right :P
<TD-Linux> most usb floppy drives are tri-mode btw and will happily spin up to 360rpm if asked
<cr1901_modern> tri-mode as in what I listed above?
<TD-Linux> 360 and 300rpm
<TD-Linux> tri-mode specifically refers to DD 360rpm, HD 360rpm, and HD 300rpm
<TD-Linux> actually bi mode might be more accurate for the usb ones as they probably don't do DD 360rpm but I never tried
<TD-Linux> oh also pc98 was usually 1024 byte sectors but can handle 512 byte sectors as well
<andlabs> not evne 3.5" only
<andlabs> but IBM/NEC 3.5" only
<andlabs> amiga and classic mac 3.5" need not apply
<andlabs> also I thought the difference between IBM and NEC was the CHS count nto the RPM
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