Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
IBM mainframe tube module part II: Powering up and using a 1950s key debouncer
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In the 1950s, before integrated circuits or even transistors, mainframe computers were built from thousands of power-hungry vacuum tubes fil...
5 comments:
Xerox Alto's 3 Mb/s Ethernet: Building a gateway with a BeagleBone
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The Alto was a revolutionary computer designed at Xerox PARC in 1973. It introduced the GUI, high-resolution bitmapped displays, the optic...
7 comments:
An 8-tube module from a 1954 IBM mainframe examined: it's a key debouncer
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IBM's vacuum tube computers of the 1950s were built from pluggable modules, each holding eight tubes and the associated components. I re...
15 comments:
Xerox Alto zero-day: cracking disk password protection on a 45 year old system
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We've been archiving a bunch of old Xerox Alto disk packs from the 1970s. A few of them turned out to be password-protected, so I nee...
19 comments:
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