On Mar 22, 2010, at 5:07 PM, Brent Hilpert wrote:
I dealt with a reasonably complex async-design logic
system from
the 60's in
reverse-engineering and repairing a Casio AL-1000 calculator:
http://www.cs.ubc.ca/~hilpert/eec/misc/CasioAL1000Tech/index.html
and in particular:
http://www.cs.ubc.ca/~hilpert/eec/misc/CasioAL1000Tech/
electronics.html#edgepulse
What I call 'edge-pulse gates' - a sort of monostable - are
injected into the
logic at appropriate places to soak up the glitches (one would have
to look at
the schematic to see where/how they are actually used).
Wow.
I am impressed. That's one of the most detailed and well-
presented reverse-engineering projects I've ever seen.
And I had no idea that a four-function calculator could be SO
COOL! :)
-Dave
--
Dave McGuire
Port Charlotte, FL