Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
The printer that wouldn't print: Fixing an IBM 1401 mainframe from the 1960s
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The Computer History Museum has two operational IBM 1401 computers used for demos , but a few weeks ago one computer suddenly couldn't ...
19 comments:
Glowing mercury thyratrons: inside a 1940s Teletype switching power supply
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We recently started restoring a Teletype Model 19, a Navy communication system introduced in the 1940s. 14 This Teletype was powered by a b...
17 comments:
Inside the die of Intel's 8087 coprocessor chip, root of modern floating point
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Looking inside the Intel 8087, an early floating point chip, I noticed an interesting feature on the die: the substrate bias generation circ...
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