[cctalk] Re: Computer Museum uses GreaseWeazle to help exonerate Maryland Man

As Will pointed out, cores are fairly large storage elements, and their switching speeds are more modest. Not necessarily quite so modest, though -- the CDC 6600 mainframes in 1964 had memory cycling at 1 MHz rate, which means the basic operation (read and restore) takes only a few hundred nanoseconds. I think the main limitation in that case wasn't so much the cores as rather the difficulty of driving pulses 100 or so ns wide through a higly inductive load. There are some unusual circuit tricks in those memories to reduce that problem compared to the more common 4-wire designs. paul