27 Jul
2007
27 Jul
'07
6:51 a.m.
From: "Chuck Guzis" <cclist at
sydex.com>
On 26 Jul 2007 at 21:59, dwight elvey wrote:
Hi
When I worked at Intel, I was responsible for test of the analog board
that went with the 3000 series controller board.
It seemed that even at the time, most of the engineers were
only digital and something like a PLL or balanced mixer were
beyond them.
I did find a bug on the controller cards. It seems that there was
a race. It was on one of the lines from the ROMs that controlled
one of the states. The problem was that the newer ROMs
were getting too fast and the outputs were changing too
quickly. I don't recall what was done to fix that but I thought
it was interesting. I believe they added a little more delay
to one of the clocks.
Dwight
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I'm only familiar with the 2901 and 3000.
I've looked at the
signetics 8X300 but that is more of a halfway between uController
and bit slice.
Dwight
MMI's 6701 was *very* close to the 2901. There was also Moto's 10800
ECL series and some early Fairchild (3800?) parts, as well as Intel's
3000 series (you can find that on the old MDS-800 8" floppy
controllers).