COM op code
03-24-2005, 01:45 AM
#1
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COM op code
Wasn't sure of a good subject header....
I have a ram variable that I want to work with that
ranges from 255>0. I want to use it for a look up table.
This would require me to invert the table to match.
While this works, it looks screwy.
How would I go about changing the ram variable to range from 0>255 after loading it to an ACC?
I have a ram variable that I want to work with that
ranges from 255>0. I want to use it for a look up table.
This would require me to invert the table to match.
While this works, it looks screwy.
How would I go about changing the ram variable to range from 0>255 after loading it to an ACC?
03-24-2005, 07:07 AM
#2
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As you are thinking the COM instruction is the correct one. Load the variable into reg A and COMA it (or reg B and COMB it). It is a straight 1's compliment.
Rbob.
Rbob.
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