7 Sep
2004
7 Sep
'04
1:42 p.m.
From: "Joe R." <rigdonj(a)cfl.rr.com>
>> The Intellec MDS 800 is the development
system that Intel sold to
create
>> products on their 8080 and later processors.
It was itself based on
what
>> later became known as the
"Multibus" architecture. It ran a 2MHz 8080
cpu and
>> was standard with 16K bytes of RAM. You
could add more, up to 64K that
the
>> main cpu (the 8080) could address.
>> Intel sold a disk-drive subsystem that consisted of two Shugart 801 8"
floppy
>> drives. They could work as single density or
double density depending
on
>> whether you had the 201 or 202 controller
board set. Yes, it was a set
of TWO
>> multibus board to control those two floppy
drives.
>> Gary Kildall wrote the CP/M operating system for that computer and
Intel
also
>> sold their own called ISIS-II (there might
have been an ISIS without
the II,
>> but I never knew of it).
I used the system with whopping 3 floppy drives !
It was used by a Philips subsidiary, "ap radiotelefon", much like Pye in the
UK.
I managed to program a switchboard, with 11 local phones, 2 trunk lines, and
path to 3 radio transceivers, each with 3 channels.
The computer part of it consisted of 1 Siemens Eurocard with an 8085, with
28K EPROM and 4K RAM, IIRC.
The whole system was mounted in a 19" rack, about 7 feet high. The bottom
third pard was used exclusively for batteries, as it had to be able to work
without external power for 12 hours.
Nico
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