Hi,

I'm new to this list so this may have been answered before.

I'm looking for a neat code snippet for word subtract for the 16F84. I've found some info for word add (on Dejanews) but I can't seem to extend this simply to subtract.

for word add I've got:-

        MOVF            Word1Low,W
        ADDWF   Word2Low,F
        MOVF            Word1High,W
        BTFSC           STATUS,C
        INCFSZ          Word1High,W
        ADDWF   Word2High,F

... which produces Word2 += Word1, with carry correctly set!

Any ideas?

Also, does anyone have the URL of a searchable acrhive for this list?

Thanks

Ian