Re: [PATCH/RFC] atafb and panning

[Petr Stehlik <pstehlik@sophics.cz>]

Geert Uytterhoeven píše v St 19. 11. 2008 v 09:15 +0100:
> > par->hw.falcon.xoffset takes care of that, and xoffset takes care of the rest. 
> > Since the partial word offset shifts the beginnig of the scan line into the 
> > first word, the offset to the next scan line (par->hw.falcon.line_offset) has to 
> > be shortened. 
> 
> Sounds reasonable. But the shortening part doesn't work on ARAnyM, nor do
> small panning increments. So it really smells like an ARAnyM bug.

I guess this is about horizontal scrolling which was used in old 2D
games only and frankly, we don't have many games running on ARAnyM (it's
not the goal of ARAnyM project, anyway). I hacked the VIDEL emulation
many years ago just to get the TOS booting and even though it's been
improved by others since then it's likely nobody run into this yet.

Just please tell me if the xoffset you mention is the 0xff8264 register
or if I am completely out. And for now write the linux kernel according
to the HW docs and I'll then correct the VIDEL emulation to do the right
thing in fbtests :-)

Thanks :)

Petr

P.S. There is a new release of ARAnyM in sid since last week (that has
the special "--halt" option for Stephen and other installing
Debian/m68k :-) but I am willing to do another release as soon as this
probable/apparent VIDEL deficiency is fixed.


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