Subject: RE: [stella] RE: Illegal opcodes...another question From: "Dennis Debro" <ddebro@xxxxxxxxxxxxx> Date: Tue, 14 Jan 2003 09:08:54 -0500 |
Thanks again Thomas, > > You're not updating y for each scanline, right? > > Right, only every 2nd scanline (-> 2LK). All objects have a two line > vertical resolution. The positioning is done with single line precision by > using VDELPx (for the cars) and different kernels (for the zombies). I had been thinking 1LK. Now I see why it's done that way. BTW, how does VDELPx work? From what I understood from the manual it doesn't give you players with the resolution of a 1LK but you can move them 1 scanline at a time. Is that right? I originally thought it would let you load the graphics registers and just not display them until the next scanline. I quickly found out that wasn't true unless I did something wrong. If VDELPx could give me single line graphic resolution it would really save me some headaches with kernel timing. That way I wouldn't be restricted to HBLANK for loading player graphics and colors. The 6-digit display is a 1LK, right? Is that only possible because they are loading GRPx twice during a scanline? Take care, Dennis ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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