> I think you meant btfss instead of btfsc.

Yeah, I did.

> If so, won't that just get 0x000
> - 0x3ff? You can't change the 3 to a 4 or you'll wipe out the SFRs between
> 0xf80 - 0xfff (including POSTINC0 which will cause an infinite loop).

Yeah, you're right of course.

> hint, suppose you use LFSR 0,0xf7f?

Now that you say so... pretty obvious....

lfsr    0,0xf7f
loop:
clrf    POSTDEC0    ; 1 for slow, 8 of em for fast
clrf    POSTDEC0
clrf    POSTDEC0
clrf    POSTDEC0
clrf    POSTDEC0
clrf    POSTDEC0
clrf    POSTDEC0
clrf    POSTDEC0
btfss FSR0H,7
bra    loop


Duh...
Bob

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