A89: Re: Addressing

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A89: Re: Addressing


Everything seems to be right, assuming that d2.w is 0 or 1 and that
graphlib::choosescreen is 1.

Ï'm not sure about mulu.l but it should work (I think mulu disregards the size
attribute).

 / Niklas Brunlid
Check out Prosit for the TI-89 / TI-92+ at http://prosit.ticalc.org
Random PQF Quote follows:

"Hah, I can just see a real playsmith putting *donkeys* in a play!"
        -- (Terry Pratchett, Lords And Ladies)

----- Original Message -----
From: <KeysDezez@cs.com>
To: <Assembly-89@lists.ticalc.org>
Sent: Saturday, March 18, 2000 6:42 PM
Subject: A89: Addressing


>
> If d0 contains the x coordinate, d1 contains the y coordinate, and d2
> contains the picture number I want to load, why doesn't this work?
>
> choose:
> lea         Pic0(pc),a0
> mulu.l  #24,d2
> add.l   d2,a0
> move.b  #%11111111,d3
> move.l  graphlib::plane0,a1
> jsr         graphlib::put_sprite_mask
> add.l   #12,a0
> move.l  graphlib::plane1,a1
> jsr         graphlib::put_sprite_mask
> rts
>
> Pic0:
>     dc.w 8
>     dc.w 1
>     dc.b %00000000
>     dc.b %00000000
>     dc.b %11111111
>     dc.b %11111111
>     dc.b %00000000
>     dc.b %00000000
>     dc.b %00000000
>     dc.b %00000000
>
> Pic0a:
>     dc.w 8
>     dc.w 1
>     dc.b %11111111
>     dc.b %00000000
>     dc.b %00000000
>     dc.b %11111111
>     dc.b %11111111
>     dc.b %11111111
>     dc.b %11111111
>     dc.b %11111111
>
> Pic1:
>     etc
>     etc
>
> Pic1a:
>     etc
>     etc
>
> etc
> etc
> etc
>
>
> Thanks.
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