4004 and IC history / was Re: Vintage computer photogallery

On Sunday 14 October 2007 16:07, Tony Duell wrote: Yes, and I've managed to scrape up data on those. If I'm not mistaken, that dual floppy drive in the Cromemco we were talking about a bit ago uses a bunch of those in there. (Looking...) Yup, here in the "299B Disk Drive" manual I spot some 75453 and 75454 in several locations in there. Those always struck me as extremely handy parts, I wonder if they're still commonly available? Those were LS56 and 57, or at least that's what's in my parts page, if there were earlier non-LS versions of them I haven't found any data on them. I don't recall ever actually running across those, but do remember some other part number that was a similar package size and functionality. And speaking of 50 and 60 Hz, I have this digital clock here that I got *real* cheap, because it has a problem. it gains a LOT of time every hour. Something like 10 minutes, maybe? I'm convinced that it's jumpered (or something) for 50 Hz line power. :-) -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin