Computing (FOLDOC) dictionary
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humour, processor (HCF) Any of several undocumented and
side-effects, supposedly included for test purposes on several
well-known architectures going as far back as the
IBM 360.
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.
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(1995-12-14)