Thought my 6502 is good enough for what I'm doing, I'm not a guru and there
are some things that I would like to do in a more efficient way, if
possible. So, if you can help me...
Is there a faster way than this to get the absolute value of the accumulator?
(...)
BPL plus
EOR #$FF
CLC
ADC #1
plus:
(...)
...and a better way to check when A is between two values (#amin <= A < #amax):
(...)
CMP #amin
BCC outrange ; I don't like...
CMP #amax
BCS outrange ; ...all this jumping...
(..do what is needed when A is in range..)
JMP done ; ...isn't there an alternative?
outrange:
(..things to do when A is out of range..)
done:
(...)
Grazie,
Piero
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