ChipsHacker Newsabout 15 hours ago
Reverse-Engineering Intel 8087 FSCALE Microcode
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The Opcode Collective is reverse-engineering the microcode of Intel's 1980 8087 floating-point coprocessor. Analysis of the FSCALE instruction reveals it uses over 140 micro-instructions and three subroutine levels to handle special cases, far more complex than initially expected.
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