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
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