Subject: Re: Re: [stella] Help with my demo, PAL, NTSC :-) From: Dennis Debro <ddebro@xxxxxxxxxxxxx> Date: Mon, 24 Mar 2003 18:42:55 -0500 |
Hi, > This sounds illogical! My current values: NTSC VBLANK: $01( 1 count X > TIM64T ), IIRC, this gave my 202 lines. I haven't changed PAL VBLANK yet. > NTSC overscan: also $01! So that says your kernel is ~200 scan lines. > VBLANK is supposed to be 43 or 44 x TIM64T, right? So my current values > should cause the screen in z26 to ROLL, right? That depends. If you're going for a 200 scan line kernel you will have adjust your vertical blank and overscan lines accordingly. For example, Climber 5 has 200 scan lines for the kernel. To stay within the 262 scan lines for an NTSC display I chopped 4 lines off vertical blank and overscan time. > Does z26 show NTSC 192 lines or does it "display" all 262 lines? Z26 counts the number of scan lines before the next frame. I hope this helps you. 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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