Function:

NOTs the specified bit in the register/memory operand. The bit number (CL
or immediate) is ANDed with 07 (for 8-bit operands) or 0F (for 16-bit
operands) to get a valid bit number. No flags are affected by this
operation, except by NOT1 CY.

The first (smaller) clock count in each pair is for register operands.
Note that 0F is treated as <POP CS> on the 88/86 and prefixes newer
instructions on 286+ CPUs.

(Supplied by Anthony Naggs)