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The real 7220 is almost always connected to a Z80 too.

Oh. Odd, I thought there were computers where the 7220 was connected directly to an 8086.

Pretty much anything can be connected to anything if you spend the gates. There's a 68882 FPU card for the Apple II

Eh, good point.

There's also a text-only video option (ABS card) -- Z80 + 8275. Firmware emulates a VT220 terminal or something close.

doc: http://www.tiffe.de/Robotron/MMS16/ABS-K7071/ABS-K7071.pdf
roms: http://www.tiffe.de/Robotron/MMS16/roms/ABS/

This machine is weird-ass indeed, hope Alegend45 doesn't give up on it

Well, unfortunately, there's barely any docs on it whatsoever, and the existing ones are in German, making them hard as hell to read for a monolingual like me.

In other words, until I can get one off eBay or something and study it myself, I can't finish it. Oh well, off to getting other, hopefully less obscure things booting.

Even if you cannot finish it, you can still submit the progress so far. Perhaps someone else can pick it up from there.

http://pastebin.com/TsJnqFm9

That's all the work I've got. It'll probably require some cleanup, though.

Thanks for your effort anyway.

I've only seen this machine once and it was not starting up, but maybe I can track it down again...

Sound card for poisk1 turned up (http://zx.pk.ru/showthread.php?t=22566) and its software's been dumped, but there's no useful info on the card itself (yet).

Apparently it has MIDI in/out (there's a 8251 for that), DAC/ADC and some kind of sound generator (most probably a 8253 again).