Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Showing posts with label
calculator
.
Show all posts
Showing posts with label
calculator
.
Show all posts
Reverse-engineering an early calculator chip with four-phase logic
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In 1969, high-density MOS integrated circuits were still new and logic circuits were constructed in a variety of ways. One technique was ...
4 comments:
Reverse-engineering the clock chip in the first MOS calculator
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In 1969, Sharp introduced the first calculator built from high-density MOS chips, the QT-8D , followed by the handheld Sharp EL-8, the worl...
2 comments:
Reverse engineering RAM storage in early Texas Instruments calculator chips
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Texas Instruments introduced the first commercial single-chip computer in 1974, combining the CPU, RAM, ROM, and I/O into one chip. This f...
15 comments:
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