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> ok
<andlabs> thanks
<andlabs> I'll mull over all of this
<cr1901_modern> I wish more ppl idled in #discferret. Kinda feel guilty I'm "stealing" traffic from them, especially since there's been rumblings of activity in the past few months.
<andlabs> #notyamahasynths
<cr1901_modern> I mean, I've never enforced an OT here lmao
<cr1901_modern> and never will
<andlabs> I should probably head home now
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<whitequark> Lord_Nightmare: "as long as your PLL correctly locks to the bit-cells regardless of what speed the drive was supposed to be spinning at, you will be able to decode the data correctly"
<whitequark> are you sure?
<whitequark> for example, i've tried reading HD 3.5" floppies with the drive in DD mode and vice versa
<whitequark> and it doesn't actually work
<whitequark> because it changes the parameters of the filter
<whitequark> wouldn't this be just as much of a problem for GCR?
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<Sarayan> wq: ohhh, you actually saw filter changes? Nice
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<KitsuWhooa> ValleyBell: How's this? https://tasossah.com/CM32P.txt
<ValleyBell> perfect! thanks
<KitsuWhooa> And here are two more midis, that I hopefully got the mixing levels correct on https://vps.tasossah.com/misc/rm/AXIS_0B.flac
<KitsuWhooa> actually, ValleyBell, hold on, it's incomplete
<KitsuWhooa> I forgot the crystals
<KitsuWhooa> :p
<KitsuWhooa> ValleyBell: https://tasossah.com/CM32P_v2.txt
<KitsuWhooa> I'll take a few pictures of the CM-32P, clean up the jacks and the power switch and put it back together
<ValleyBell> this sounds really nice!
<whitequark> Sarayan: yes, they are very obvious
<whitequark> not sure if I have any captures from that, but I could reproduce them if I wanted
<whitequark> in short, the domain size histogram gets completely messed up
<Sarayan> nice
<Sarayan> I guess it's the bounce filter triggering
<whitequark> I think so
<whitequark> I could capture it now if you want
<whitequark> not a lot of effort
<Sarayan> nah, I'm good :-)
<Sarayan> hey, let's check where the package is
<Sarayan> it's moving around, still in France
<whitequark> neat
<KitsuWhooa> Right, this is back together now https://tasossah.com/CameraPics/P1120095.JPG
<protosphere> has anyone heard of the SC-55K?
<protosphere> seems to be a SC-55 with integrated karaoke/mic functionality, but I can't find info on it
<protosphere> i might pick it up as a curiosity since it's local
<KitsuWhooa> Sounds handy
<KitsuWhooa> And Japanese :
<KitsuWhooa> :p
<protosphere> i wonder what it looks like inside
<cr1901_modern> buy it, open it, and dump the ROMs :P?
<protosphere> from the outside it looks like a 55ST
<KitsuWhooa> Roms will most likely be the same I'd imagine
<protosphere> what about for the echo? i wonder if it's analogue or some sort of dsp
<cr1901_modern> then how does the "K" fit into it?
<protosphere> do i rea;lly need a third sc55
<KitsuWhooa> Can always resell it I guess
<protosphere> 90 AUD isn't too bad for an ST these days either
<cr1901_modern> nukeykt: Thanks for stopping by, btw :). Wb
<protosphere> well, I got it. I'll see if it has anything interesting inside
<cr1901_modern> nice!
<Lord_Nightmare> did we ever figure out what cpu the sc-55 actually uses?
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<cr1901_modern> Lord_Nightmare: 8098 series?
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<Lord_Nightmare> 8098?
<Lord_Nightmare> er, i8098, the 8-bit variant of the MCS-96 (i guess itd be called the MCS-98?) series?
<Lord_Nightmare> I know the original mt-32 pcb rev 0 and 1 uses a romless 8095, the mt-32 2.0 pcb uses an ?8098? or is it an 80198? i forget, i know balrog has one
<Lord_Nightmare> the lapc-i and the cm-32l use an 80198
<Lord_Nightmare> the cm-32p uses an 8098
<Lord_Nightmare> please note the mt-32 firmware was ported poorly to the 80198 from the 8095 and so some software-lfo cycle timed code no longer functions correctly
<Lord_Nightmare> on the cm-32l, lapc-i (and cm-64 which is a cm-32l and cm-32p in one case)
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<cr1901_modern> Foone: Thread request... have you ever done a thread on the IEC C13 receptable (or is it C14?) found on old computer power supplies? :3 https://twitter.com/ClarusPlusPlus/status/1187799657424019456
<KitsuWhooa> One of my power supplies switches the power on and off on that plug too :p
<__sen> KitsuWhooa: an old AT one, or one with soft power?
<KitsuWhooa> AT :p
<__sen> Ahh that makes more sense, okay :D
<cr1901_modern> Both my 286 and 8088 use the power-pass-through feature
<cr1901_modern> I understand it's not useful anymore, but I wish modern computers had them
<__sen> Not useful for the original purpose maybe, but still useful overall I think. Would be neat if there was a relay to toggle it based on soft power, which is what I thought KitsuWhooa had :)
<KitsuWhooa> I mean
<KitsuWhooa> I'm sure you can mod one to do it :p
<KitsuWhooa> very easy, actually
<__sen> True! :D
<KitsuWhooa> just take a relay and hook it up to 12v or whatever
<KitsuWhooa> whenever the power supply turns on, the relay will turn on too :p
<cr1901_modern> I don't think AT supplies support soft power
<KitsuWhooa> nope
<KitsuWhooa> which is why it's easy to switch the power through plug
<cr1901_modern> you can force a system reset by grounding power-good, but that's about it
<KitsuWhooa> I have an odd QDI motherboard that has both AT and ATX
<KitsuWhooa> ATX doesn't work on it for some reason
<KitsuWhooa> but the reset does :p
<KitsuWhooa> I'm really struggling to remember the model
<__sen> That's the most transition-era board I've ever seen I think. AT and ATX, PCI and ISA, DIMM and SIMM, USB and PS/2+RS232+Parallel, neat.
<andlabs> !!!!!
<andlabs> I just lucked out
<andlabs> the thing that led me down the rabbit hole of Commodore 64?
<andlabs> I just bought one for sale on eBay
<andlabs> ***including the even more rare 4 pieces of software that were available for sale separately***
<cr1901_modern> nice!
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<ZirconiumX> https://twitter.com/cr1901/status/1187788855208022016 <--- you're giving me dangerous ideas, cr1901_modern
<andlabs> take bean eater's 8-bit breadboard computer and make it entirely with 7400s
<andlabs> yes, even the LEDs
<andlabs> and resistors
<andlabs> can you make resistors out of transistors?
<andlabs> is resistor-transistor logic something tha tstill happens in packaged ICs?
<andlabs> I'm mostly asking because I want to see a single-IC version of the standard MIDI serial layout
<cr1901_modern> >can you make resistors out of transistors?
<cr1901_modern> Attach the gate of a depletion-mode N-type MOSFET to its drain
<cr1901_modern> ZirconiumX: Honestly, it's still more fun for me to play w/ Jellybean logic than use yosys to do 7400 design :P.
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