[Coco] real-time mouse cursor

[Roger Taylor]

At 02:06 AM 1/27/2008, you wrote:
>On Sat, 26 Jan 2008, Roger Taylor wrote:
>
> > At 09:54 PM 1/26/2008, you wrote:
> >
> > >Or better yet, replace the TST $FF03, BPL a@ with a SYNC instruction.
> > >(Of course, time isn't really crucial if you're spending the 
> bulk of it doing
> > >nothing while waiting for the next interrupt.)
> >
> >
> > Doesn't this SYNC to any interrupt, though?
> >
>
>My recollection is that SYNC responds only to an interrupt that is enabled, so
>it should ignore the HSYNC and respond only to VSYNC, unless you've enabled
>something else.  Super Extended Basic uses a SYNC instruction in its PALLETTE
>command for the same purpose of sychronization with the field synch, 
>I believe.



In my new games I use multiple interrupt sources.  Just to be sure, I 
manually wait for the vertical blank.