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
<andlabs> a 1-bit CPU for real, with practical usage, not just a thought experiment o.o
<ej5> yeah that's a good one. not sure how many computers ever got built around them. iirc they were meant for industrial controllers
<ej5> heh, and there it is, right on the front page of the datasheet.
<whitequark> this is super interesting actually
<whitequark> if you look at figure 2 you can see it's supposed to be used in a VLIW-like fashion
<ej5> yeah, just drop down a couple more of them and you've now got multiple execution units
<andlabs> An example of a 1-bit architecture that was marketed as a CPU is the Motorola MC14500B Industrial Control Unit (ICU),[6][7] introduced in 1977 and manufactured at least up into the mid 1990s.[7] One of the computers known to be based on this CPU was the WDR 1-bit computer.[8] A typical sequence of instructions from a program for a 1-bit architecture might be:
<andlabs> `germany`
<andlabs> https://en.wikipedia.org/wiki/Wang_Laboratories#1200 this apparnetly uses a different arch
<andlabs> heading home, afk
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<cr1901_modern> boneless^2 CPU
<Lord_Nightmare> is x68303 who posted that patch for equites and champbas in MAME someone in here?
<Xyz_39808> I doubht kayama is in here https://twitter.com/x68303
<cr1901_modern> Can someone invite them?
<cr1901_modern> I got valsound in here once. I should try that again.
<Lord_Nightmare> wait, who is that again? I'm not familiar with that person
<Lord_Nightmare> I see a Yuzo kayama who was born in the 1930s
<Lord_Nightmare> in google
<Xyz_39808> I don't know how notable he is. I just see him a lot in my TL from a buttload of mutuals
<Xyz_39808> I feel like he mayyy have been in the famicompos
<Xyz_39808> oh, he was around since the verrrry beginning https://www.youtube.com/watch?v=3kwINKdMhYs
<Lord_Nightmare> i'm starting to wonder if he was the original alpha denshi corp programmer on equites
<cr1901_modern> You could ask :P?
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<andlabs> an original developer working on mame? :o
<andlabs> Xyz_39808: woah dnb version of that song very good
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<Lord_Nightmare> Foone: the brother midi disk thing is the infamous MOERO device!
<Lord_Nightmare> it uses an 8051 *AS A FLOPPY CONTROLLER*
<Lord_Nightmare> its not as horrible as you think. ITS WORSE
<Lord_Nightmare> afaik the disk format is SINGLE SIDED 3.5" in FM FORMAT
<Lord_Nightmare> with what i believe is a nonstandard FM track layout too
<Lord_Nightmare> also single density because
<Lord_Nightmare> so you're cramming, onto that 720k disk... 180k? I think?
<Lord_Nightmare> maybe less
<Lord_Nightmare> the roland mc500 may be derived from it. or maybe its the other way round?
<Lord_Nightmare> I think balrog has one of the devices in the series of things that used MOERO, i think it was used in 2 or 3 devices, by different manufacturers
<Lord_Nightmare> it was as you'd expect a catastrophic failure to penetrate the market, presumably because people liked using the actual full storage capacity of their floppy disks
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<andlabs> is 8051 as a floppy controller really bad?
<andlabs> I've seen 8051 used for USB-SATA controllers
<Foone> wow!
<andlabs> yes
<andlabs> github.com/andlabs/reallymine
<andlabs> someone beat me to figuring out the actual decyrption mechanism but by god I could have done that
<andlabs> but it gets better
<andlabs> western digital took four manufacutrers's chipsets for htese
<andlabs> two used 8051
<andlabs> one used ARM
<andlabs> the last... used 68000
<andlabs> yes, really
<andlabs> the last is also the only one that I can bypass without a pasword because they used a single key for protecting the password itself
<Sarayan> a 68k has a hd interface chip?
<Sarayan> s/has/as/
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<whitequark> "catastrophic failure to penetrate the market" sounds vaguely sexual tbh
<Ultrasauce> owo notices ur growth
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<andlabs> proletariate orgasm denial
<Foone> what
<Lord_Nightmare> andlabs: what i meant by 8051 as a floppy controller, the 8051 is acting in place of a upd765 etc
<cr1901_modern> When I look up moero, I just find some references to Famicom Disk System
<andlabs> Lord_Nightmare: and I'm saying I'm not sure how that's inherently bad in and of itself
<andlabs> unless there's some speed predictability that being in software would violate?
<Lord_Nightmare> i think the main issue is the 8751 isn't fast enough to poll the read head etc and be able to isolate sectors in a sane way
<Lord_Nightmare> which is why they could only do FM at low density
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