10 May
2000
10 May
'00
11:18 a.m.
allisonp(a)world.std.com wrote:
On Tue, 9 May 2000, Ron Hudson wrote:
Hi
This wasn't the only clever part. They also jammed instructions
into the 8080 to do fetches and stores. All they used were
a number of one shots, some glue logic and 3state buffers.
The first time I looked at how they did it, I was impressed.
I don't know if it was an original idea but it was clever.
Dwight
Does anyone still sell s100 based computers?
Aren't they used still for process controll and automation?
Effectively not for many years.
2nd question
How did the control panel of the IMSAI work, was it controlled by a rom
program
that lit the leds and read the switches?
There was no rom in the base imsai. The frontpannel was all hardware and
worked by inserting wait states in the instruction flow effectively
stopping the micoprocessor at every cycle.