S-100 history (was Re: CompuPro CPU-Z with IMSAI and Front Panel issues)
ajp166 at verizon.net
Mon Oct 18 21:14:56 CDT 2010
On 10/18/10, David Gari <dgari at msn.com> wrote:
>> I may be able to help. I've worked for Morrow Designs (Thinker Toys),
>> Wordstar (MicroPro) and Stoneware (DBMaster). Yes, I am older than Godbout.
>> I have pwned two Altairs and an IMSAI. I took a tour of the giant (empty)
>> Cromemco facility back in the day. Sooo much promise. So sad.
I started with S100 by building my first Altair8800 sn200! Move to a
and an Netronics Exporer8085with all the add on s100 extensions.
Now my collection has those and two Compupro S100 systems one Z80 the
other 8085/8088. The z80 8mhz system has the MPX1 board for peripheral
along with hard disk and Mdrive (ramdisk) plus a 256kb of ram.
The big set is that Compupro was one of the hardball systems, Cromemco
being another. Nice crates both of them and built well.
The IMSAI was better than Altair but the S100 bus would evolve to be more
than either of them started at. Bus level incompatibilities were a big
early on and Dram was a nightmare until people figured out that bus level
signals could not be counted on as 8080/8085/z80 were all different.
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