RE: skipdraw from Eric Ball WAS: [stella] Finally underway:

Subject: RE: skipdraw from Eric Ball WAS: [stella] Finally underway: 2600 Cookbook
From: "Dennis Debro" <ddebro@xxxxxxxxxxxxx>
Date: Tue, 13 Apr 2004 09:58:36 -0400

Hi Kirk,

> The trouble is, he doesn't specify what Y, used in "lda (P0_Ptr),y",
> in there--it looks like there should be "sty P0_Y" somewhere,

y is set to the height of the kernel at the beginning of your kernel. Then
it's decremented with each scan line (1LK) or ever other scan line (2LK).
This saves you from loading y to load your graphics.

Take care,
Dennis 


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Current Thread
skipdraw from Eric Ball WAS: [stella] Finally underway: 2600 Cookbook KirkIsrael - Tue, 13 Apr 2004 09:07:57 -0400 (EDT) Dennis Debro - Tue, 13 Apr 2004 09:59:16 -0400 (EDT) <= Thomas Jentzsch - Tue, 13 Apr 2004 11:38:03 -0400 (EDT) <Possible follow-ups> KirkIsrael - Tue, 13 Apr 2004 12:33:24 -0400 (EDT) Eric Ball - Tue, 13 Apr 2004 19:28:45 -0400 (EDT)

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