28 May
2004
28 May
'04
1:58 a.m.
On Thu, 27 May 2004, Dave Dunfield wrote:
#1 ISAAC INTERFACE BOARD D91A-8318 REVC
Copyright 1981 by CYBORG CORP
Large format card (large enough to slope down at front)
Has an 6522 on it.
Also has an external battery box that plugs into a small barrel
jack at the front of the card.
Has 6 pin terminal strip, plus two 34 pin ribbon cable headers.
Small 4-position DIP switch at front, 8-position DIP switch farther
back (under terminal strip).
No idea, but it sounds like whatever hooked up to it was pretty cool :)
#2 No markings at all.
Smaller card, slightly longer than Apple disk controller.
Has a 20 pin header sticking out the back of the card.
Has an RCA 1802 CPU on it!
2 2k EPROMS
1 6 position DIP switch.
Damn, two really cool cards in one //e! Again, no idea. Have you gone
into the monitor and dumped the ROM address space for each card to see if
there are any clues there?
--
Sellam Ismail Vintage Computer Festival
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