[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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