8 Dec
2005
8 Dec
'05
2:11 p.m.
Chuck Guzis wrote:
I believe it's a flag indicating a carry from the low nybble to the high
nybble of the accumulator. That is, it indicates a carry out from the low
half of the byte.
It's mainly needed for BCD operations if memory serves.
-tony
codes. Inspection of the 808x instruction set
can be very illuminiating,
particularly when it comes to arcana like which instructions modify (and
how) the half-carry flag, for example.
The "half-carry flag"? Huh?