[hatari-devel] Better video emulation on STE wrt video address

npomarede at corp.free.fr npomarede at corp.free.fr
Sun Feb 7 20:02:32 CET 2010


Hello,

I just committed 2 patches for STE that should fix some long standing 
issues :

  - better emulation when reading video counter at $ff8205/07/09. This 
fixes the screen flickering problem in Utopos (tested with 1.5 and 1.6), 
as video address modification are now correctly made during the right 
border.

  - better support for writing to $ff8205/07/09, especially when display 
is ON. Even if doing so would give bad results on a real STE, the video 
address for the next hbl (and the rest of the screen) was not correctly 
computed in that case. This code is a little bit more complex but should 
give better results than the previous version.
This especially fix the bottom scrollers in EPSS Demo by Unit 17.

Don't hesitate to test this with some other STE demos, hopefully no 
regression should occur, but you never know.


Nicolas



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