27 Jan
2002
27 Jan
'02
11:07 a.m.
William Donzelli wrote:
What I meant was that the control for a 2311 in an
1131 is the cheap
kludge - one shots, delays, and the like - when compared to the "real"
controller, the 2841. This control unit was very complex - probably more
so that an entire 1130 system.
Since when are one-shots are a problem, they have there place.
Thinking back more; most timing was asynchronous that needed
a lot set/reset flip flops and delay buffers to keep things in sync.
It is tricks to save a gate or two that is the problem.
I have no real engineering data (Big Blue Binders) on
the 2841, but it
actually would not suprise me is the 1131 or 1800 was the processor inside
(or maybe a modified version).
I suspect a hard code sequencer.
William Donzelli
aw288(a)osfn.org
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html