On Mon, Dec 11, 2000 at 01:45:55PM +0000, Maarten ter Huurne wrote:
> On Monday 11 December 2000 12:20, you wrote:
> > > I have some doubts about the way I described SCREEN7. I can't get the
> > > pixel reorder working, which could be an implementation error, but could
> > > also mean I got the algorithm wrong.
> >
> > Last night I tried to figure it out on the MSX, but failed. :( My monitor
> > it terrible which doesn't help. :( Using POINT (X,Y) it can be checked of
> > course. I'll try again tonight.
>
> Forget everything I wrote about SCREEN7 reorder. It works just like SCREEN8:
> at the byte level. So you can use the same formula to remap addresses. And
> the correct pixel formula looks like this:
>
> #define VDP_VRMP7(X, Y) (VRAM + ((X&2)<<15) + ((Y&511)<<7) + ((X&511)>>2))
>
> The Almost Real title sequence works now.
Ah that's also what my memory tells me. :) But my memory isn't all that
reliable.
Thanks for the information Maarten.
Sean
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