Ken Shirriff's blog

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

Showing posts with label microcode. Show all posts
Showing posts with label microcode. Show all posts

The Group Decode ROM: The 8086 processor's first step of instruction decoding

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A key component of any processor is instruction decoding: analyzing a numeric opcode and figuring out what actions need to be taken. The ...
3 comments:

Reverse-engineering the multiplication algorithm in the Intel 8086 processor

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While programmers today take multiplication for granted, most microprocessors in the 1970s could only add and subtract — multiplication r...
13 comments:

Reverse-engineering the register codes for the 8086 processor's microcode

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Like most processors, the Intel 8086 (1978) provides registers that are faster than main memory. As well as the registers that are visibl...
4 comments:
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