12 lines
529 B
Plaintext
12 lines
529 B
Plaintext
HCF
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/HCF/ , n. Mnemonic for Halt and Catch Fire , any of several undocumented
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and semi-mythical machine instructions with destructive side-effects,
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supposedly included for test purposes on several well-known architectures
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going as far back as the IBM 360. The MC6800 microprocessor was the first
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for which an HCF opcode became widely known. This instruction caused the
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processor to toggle a subset of the bus lines as rapidly as it could; in
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some configurations this could actually cause lines to burn up. Compare
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killer poke.
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