From: George Yanos (george_at_yanos.com)
Date: Wed Dec 19 2001 - 19:48:53 EST
Poking around a bit I found that the Apollo computer had not quite 80k
or memory, about 78k with fixed values (ROM) holding the program and 2k
which could be changed (RAM) by the program. It could do a 15bit add in
23.4 microseconds, which translates into about 43khz (k, not m).
Actually, the cycle time was probably less than that, so, guessing
with no information, it would be called 200khz on the same basis as a
machine is rated today.
There were two of these machines on Apollo, one in the command module
(which stayed in orbit around the moon) and one in the lander. They
had different programs burned into their ROM.
This from:
http://www.hq.nasa.gov/office/pao/History/ap15fj/compessay.htm and
from the History of Computing in Spacecraft which is referenced there.
-- ********************************************************************* * George Yanos * * * UTC at UIC * * * 312-413-0059(w) * * * 708-848-4221(h) * * * gyanos_at_uic.edu * * *********************************************************************
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