[A89] Re: ellipses again

To: assembly-89@lists.ticalc.org
Subject: [A89] Re: ellipses again
From: jeff <jefromi42@yahoo.com>
Date: Sun, 15 Jul 2001 11:07:22 -0700 (PDT)
In-Reply-To: <00ae01c10cbf$ab206b80$27760a18@trntn1.nj.home.com>
Reply-To: assembly-89@lists.ticalc.org


Earlier, TJ gave this code for XORing a VS onto the screen.  
lea $4c00,a0
lea VS,a1
move.w #2999,d0
xorloop:
eor.b (a1)+,(a0)+
dbra d0,xorloop

Unfortunately, I don't know asm.  I'd like to try the VS approach, but I don't know how to use
this code.  I'm pretty sure you write
asm(code...);
but I don't know how to get the memory locations to the asm.  I'd also like to have it only go
through the rectangle that contains the ellipse, not the entire screen.  Even if this means taking
a little extra time defining the memory to read and write to (it won't all be consecutive) I think
it will make up for it.
jeff

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References:

[A89] Re: ellipses again

From: "Scott Noveck" <noveck@pluto.njcc.com>