Function:

REPC repeats the following string instruction while the Carry Flag is set.
REPNC repeats the following string instruction while the Carry Flag is
clear. CX should hold the maximum number of iterations,
just as with REPZ/REPNZ.

Note that since these instructions works with the Carry Flag, they have no
special effect on MOVS and LODS. A simple REP should be used in these cases.

These instructions are NEC specific. They are not implemented on the Intel
CPUs. Note that the 386+ implements the listed opcodes 64 and 65 for the
segment override instructions FS and GS respectively.

If your software will run on a NEC, they may be handy.




ROL4   Rotate left 4 bits (NEC V20/30 only)
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