Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Reverse-engineering the surprisingly advanced ALU of the 8008 microprocessor
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A computer's arithmetic-logic unit (ALU) is the heart of the processor, performing arithmetic and logic operations on data. If you'v...
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Inside the 74181 ALU chip: die photos and reverse engineering
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What's inside a TTL chip? To find out, I opened up a 74181 ALU chip, took high-resolution die photos, and reverse-engineered the chip. 1...
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Die photos and analysis of the revolutionary 8008 microprocessor, 45 years old
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Intel's groundbreaking 8008 microprocessor was first produced 45 years ago. 1 This chip, Intel's first 8-bit microprocessor, is the...
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