Ken Shirriff's blog

Computer history, restoring vintage computers, IC reverse engineering, and whatever

Showing posts with label electronics. Show all posts
Showing posts with label electronics. Show all posts

Two dies in one package: Teardown of a vintage ROM with double the storage

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In 1971, semiconductor memory was still a new development so chips couldn't hold a lot of data. To double the storage capacity, IBM ...
2 comments:

Reverse-engineering the standard-cell logic inside a vintage IBM chip

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Integrated circuits are often built from standard-cell logic, constructed from standardized building blocks such as NAND gates. Since I...
4 comments:

Germanium transistors: logic circuits in the IBM 1401 computer

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How did computers implement logic gates in the 1950s? Computers were moving into the transistor age, but transistors were expensive so cir...
4 comments:
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