What does HCF mean in Unit Measures?
This page is about the meanings of the acronym/abbreviation/shorthand HCF in the Miscellaneous field in general and in the Unit Measures terminology in particular.
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What does HCF mean?
- Mnemonic for ‘Halt and Catch Fire’, any of several undocumented and semi-mythical machine instructions with destructive side-effects, supposedly included for test purposes on several well-known architectures going as far back as the IBM 360. The MC6800 microprocessor was the first for which an HCF opcode became widely known. This instruction caused the processor to toggle a subset of the bus lines as rapidly as it could; in some configurations this could actually cause lines to burn up. Compare killer poke.