Re: A89: storing background

To: assembly-89@lists.ticalc.org
Subject: Re: A89: storing background
From: Scott Dial <wrath@calc.org>
Date: Thu, 06 Jan 2000 15:32:50 -0500
Organization: ByMe Inc. Technologies \ TCPA
References: <72.72a3aff3.25a573e9@aol.com>
Reply-To: assembly-89@lists.ticalc.org


When you set graphlib::choosescreen to 1, it allows you to use a1 as a
pointer to where you want it to draw; hence the name of the variable
choosescreen, it allows you to choose the screen to draw on.

BLoWh0Le@aol.com wrote:
> 
> In a message dated 1/5/00 4:17:36 PM Pacific Standard Time,
> littlbit@txcyber.com writes:
> 
> << put_pic
>       move.w #0,d0
>       move.w #0,d1
>       move.l #buffer1,a1
>       lea pic(PC),a0
>       jsr graphlib::put_sprite
>       bsr buf1_buf2 >>
> 
> i think i see the problem, but i'm not sure.  it seems to me that you "move.l
> $buffer1,a1" because you think put_sprite will draw to the buffer instead of
> to the screen, although i can be mistaken in your intentions.  however, upon
> checking graphlib.h, i see no mention of a1 being used as a pointer.  i hope
> i am right, but i would not take my word for it.

-- 
Scott "_Wrath_" Dial
wrath@calc.org
ICQ#3608935
TimeCity AI Guy II - www.timecity.org
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References:

Re: A89: storing background

From: BLoWh0Le@aol.com