Re: A86: adding some variables (on-calc)
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Re: A86: adding some variables (on-calc)
On Wed, 3 Feb 1999 17:29:08 EST Jeanne9005@aol.com writes:
>
>I need to add the value of x, (delta)x, and xmin. how do i go about
>that?
to get x to op1:
call _rclx ;=$4ce3
to get (delta)x to op1:
ld hl,_deltax ;=$c63d
rst $20
to get xmin to op1:
ld hl,_xminptr ;=$c55d
call _ldhlind
rst $20
>also, can i cp (NUMBERONE)? Or do I need to ld a,(NUMBERONE) / cp b?
the second one, or
ld hl,NUMBERONE
cp (hl)
>Also,
>when I sub c, which variables am i subtracting? c from a, stored into
>a, or a from c stored into a?
sub c means a=a-c
>Last thing. I saw how to do a PxON, now how do
>I test
>a pixel, and do a PxOff? Thanks
it's all a matter of doing different things with the result of findpixel.
i think i'll let someone with more expertise in the matter answer this
-josh
>Glen
>
>
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