Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Showing posts with label
ibm
.
Show all posts
Showing posts with label
ibm
.
Show all posts
Inside an IBM/Motorola mainframe controller chip from 1981
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In this article, I look inside a chip in the IBM 3274 Control Unit. 1 But before I discuss the chip, I need to give some background on main...
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Simulating the IBM 360/50 mainframe from its microcode
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The IBM System/360 was a groundbreaking family of mainframe computers announced on April 7, 1964. System/360 was an extremely risky "...
28 comments:
Reverse-engineering an unusual IBM modem board from 1965
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The vintage IBM circuit board below has a large metal block on it that caught my attention, so I investigated it in detail. It turns out t...
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