Can't see much but would guess that either a mistake on the original board
routing or a slightly different pinout/version of the cpu required the
daughter board to reroute traces.
----- Original Message -----
From: "Bill Sudbrink" <wh.sudbrink@...>
Sent: Monday, March 02, 2009 7:12 PM
Subject: [personal] RE: [midatlanticretro] IMSAI for sale
> Ouch! That hurts to look at... the insides don't look too bad though.
> I wonder why the CPU on the Cromemco ZPU is up on its own little
>> -----Original Message-----
>> From: firstname.lastname@example.org
>> [mailto:email@example.com]On Behalf Of Mike Loewen
>> Sent: Monday, March 02, 2009 8:02 AM
>> To: firstname.lastname@example.org
>> Subject: Re: [midatlanticretro] IMSAI for sale
>> On Mon, 2 Mar 2009, B Degnan wrote:
>> > A $200 IMSAI 8080 is a super duper bargain
>> The case is in rough shape:
>> ...but you're right - it's a bargain. I'm going to have to read up
>> re-forming electrolytic caps. Here's some other info he sent me:
>> "The boards are:
>> - Cromenco Z80 CPU board
>> - Scitronics real-time clock board
>> -- The BIOS I wrote for CP/M makes use of the clock but I'll be darned
>> I remember how!
>> -- Probably needs a new battery
>> - A serial/parallel board
>> - A serial board that I made (wire-wrapped). It used the 8250 UART which
>> used by the original IBM PC at that time. A write-up of the board's
>> can be found in the June 1984 of
>> Microsystems (Sol Libes magazine).
>> - The Morrow Disk Jockey 2D/B.
>> --The BIOS was modified so that an 8" double density floppy could hold
>> about 1200KB instead of the standard 800 or 900 KB. When my friend and I
>> made the change all the nerds that were our friends were amazed and
>> proclaimed that it was all the storage anybody would ever need. Times
>> changed, right!"
>> Mike Loewen mloewen@...
>> Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
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