On Thu, Jan 07, 2021 at 04:40:12PM -0600, Uffe .. Jakobsen wrote: > Segher Boessenkool wrote > > My position is it is not a bug at all, it is as designed. And it > > wouldn't even be noticed until very many years later :-) > > Well not that many years later... > > I was quite surprised when I at some point in 1988 ran one of my own demos > on a C64C with HMOS-II VIC-II. > I my own was a breadbox C64 with NMOS VIC-II and everyone I know had those. > > So the surprise was quite big when I got access to a C64C/HMOS based system > and saw grey dots every where on my demo. > Looking at the demo made it quite clear what the problem was... > Do not change the border or background color while the beam is visible on > the screen.... > But that is quite difficult to avoid when doing vertical raster splits :-D Do not change a colour while it is being displayed (in the first pixel in a block). It isn't *that* hard to avoid... Think of it as an extra twist to the puzzle ;-) SegherReceived on 2021-01-08 01:00:02
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