Re: NTSC VIC-II timing

From: Segher Boessenkool <*segher_at_kernel.crashing.org*> Date: Wed, 21 Jun 2017 14:41:26 -0500 Message-ID: <20170621194126.GY16550@gate.crashing.org> · segher_at_kernel.crashing.org

On Wed, Jun 21, 2017 at 09:15:56PM +0200, groepaz@gmx.net wrote:
> > IIRC the LP stuff can be triggered only once per frame, this makes it
> > a bit inconvenient to use for non-lightpen uses like we are discussing
> > here.  It would be nice if we could just read out the current X coor
> > directly, but nope.
> 
> wasnt that also different between VIC revisions.... older one will trigger 
> only once per frame, newer can do it any time again? like with sprite 
> collision?

I think the only difference is the old revisions trigger one cycle
earlier?

Segher

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