Re: A83: A > Op1
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Re: A83: A > Op1
Well you _could_ try the neg-instruction..
ld a,(speed)
neg
ld (speed),a
//Olle
(Tip of the day: download an z80 instruction set description from ticalc.org)
Marc Puts wrote:
>
> Sorry, i can't still figure uit what i need to do...
>
> What I want to do is negate the variable speed. That's all!
> Only if I knew how....
>
> This is what I tried:
>
> call _zerooop1
> ld a,(speed)
> ld (op1),a
> call _invop1s
> call _convop1
> ld a,e
> ld (speed),a
>
> Can anybody tell me what's wrong with it?
> (Probably everything)
>
> Thanx, Marc
References: