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Posted By

Superglob
on 2021-11-14
00:00:35

Re: Vertical scroll

Never mind. It looks like hte VIC2 implementation have a separate vertical counter that gets reset whenever the counter matches the vscroll register or if there's a bad-line. So That does away with an added although it comes at a cost of an addition counter.

Posted By

Superglob
on 2021-11-13
23:53:23

Vertical scroll

Hi Everyone..

Odd questions: Does anyone know how vertical scroll on a hardware level is implemented? For horizontal scrolling there's just is just a delay register. For vertical scrolling however, the only two ways I can think off are either having an adder (slow) or a separate counter (rather thank using the timing chin) to keep track of the vertical line. I couldn't relaly find anything in the documentation so any info wlecome!

SG