![1999 vs 2009 [4032x3024 - 2MB]](https://pic8.co/sh/w8aboz.jpg){kind=link}
Just 10 years difference. I have a 1993 IDE drive around here somewhere, the circuit board on that looks like an electronics store vomited on it.
Sounds familiar. I have a huge circuit board that bends under its own weight and takes the entire lower space inside the case, apparently it was some weird Audio I/O thing or something: https://pic8.co/sh/P3y7pY.jpg Never used it, so I still don't know what it's really for.
Interesting, looks to have multiple crystals up front with a bunch of transformers to match impedances? Some sort of audio synthesis board?
Any names or model numbers on it?
It might be Russian made, actually. Some chips have Cyrillic in them: "КР580ВИ53", "КР580ВВ55А", and so on. One of the chips has an ISD logo on it, serial number 1st line "1020AP", 2nd "9801", and 3rd "RP61SK010". I don't recognize any other logos, one of them is something that looks like a triple slash ///, another is an audio jack or a plug? And the last logo looks like a power sign like an S.
I have a Quantum drive from 1988 or so (SCSI) and it still spins up and works. Look at those beefy motor/voice coil drivers with heat sinks. The three are probably the 3-phases of the spindle motor. The big one with 15 pins looks like the usual audio amplifier ICs, so I'd guess it's for the voice coil.
That's a wonderful looking board. It always amazes me how we've managed to compress that down to an ASIC that's a controller, some RAM, and a glue chip.
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