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Fix video counter reporting on Williams games (should stay at

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maximum value until reset). [Sean Riddle]
This commit is contained in:
Aaron Giles 2012-04-24 20:12:29 +00:00
parent 9e88a602ac
commit 86769524fd
1 changed files with 8 additions and 2 deletions
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10
src/mame/video/williams.c
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@ -352,13 +352,19 @@ WRITE8_MEMBER(williams_state::williams2_fg_select_w)
READ8_MEMBER(williams_state::williams_video_counter_r)
{
return machine().primary_screen->vpos() & 0xfc;
if (machine().primary_screen->vpos() < 0x100)
return machine().primary_screen->vpos() & 0xfc;
else
return 0xfc;
}
READ8_MEMBER(williams_state::williams2_video_counter_r)
{
return machine().primary_screen->vpos();
if (machine().primary_screen->vpos() < 0x100)
return machine().primary_screen->vpos() & 0xfc;
else
return 0xfc;
}