Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
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:
Repairing a 1960s mainframe: Fixing the IBM 1401's core memory and power supply
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A few weeks ago, I wanted to use one of the vintage IBM 1401 mainframe computers at the Computer History Museum, but the computer wasn't...
19 comments:
Repairing a 1960s-era IBM keypunch: controlled by mechanical tabs and bars
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In this article I describe repairing an IBM 029 keypunch that wouldn't punch numbers. Keypunches were a vital component of punch card co...
14 comments:
Creating a Christmas card on a vintage IBM 1401 mainframe
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I recently came across a challenge to print a holiday greeting card on a vintage computer, so I decided to make a card on a 1960s IBM 140...
24 comments:
Decoding an air conditioner control's checksum with differential cryptanalysis
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Back in 2009 I wrote an Arduino library ( IRRemote ) to encode and decode infrared signals for remote controls. I got an email recently fr...
8 comments:
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