Subject: RE: skipdraw from Eric Ball WAS: [stella] Finally underway: 2600 Cookbook From: Thomas Jentzsch <tjentzsch@xxxxxx> Date: Tue, 13 Apr 2004 17:14:58 +0200 |
Dennis wrote: >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. Yup, the trick is to setup P0_ptr outside the kernel, so that it points to your graphics exactly when the right scanlines (= y- values) are reached. To avoid page penalties, this also requires the graphics to start at (align 256 + kernel-height). Have fun! Thomas ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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