[aprssig] Tracking and Stacking
noskosteve at yahoo.com
Fri Sep 21 10:34:30 CDT 2007
Drifting OT , but I believe this was because the adder
was a binary adder. When adding BCD you needed the
correction to do the decimal carry(s). Mot chips had
the same thing.
73, Steve, K9DCI
--- Dave Baxter <dave at emv.co.uk> wrote:
> And the venerable Z80 had that too with the DAA
> instruction (Decimal
> Addust Accumulator)
> Just that you had to add that instruction after
> every addition or
> subtraction to "Adjust" the blessed thing.
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