openMSX
[Bug] Sex Bomb Bunny vertically shaking image at certain vertical adjust values [sf#170]
Reported by manuelbi on 2004-11-21 18:50 UTC In Sex Bomb Bunny the whole screen shakes during the game if the vertical set adjust is -7, -6, -5, -4, -3, -2, 6, 7 or 8. AFAIK the game uses overscan, so it could be related to that. Ark-A-Noah doesn't have the problem, though, and that game definately uses overscan.
Commented by manuelbi on 2005-07-24 16:11 UTC Logged In: YES user_id=78178
Some additional info: the total amplitude of the shaking is 20 pixels on the SDL screen. The graphics when it's in the lowest position reach up to line 475 on the SDL window!
Note that this doesn't happen on a real MSX.
Commented by manuelbi on 2005-10-29 19:22 UTC Logged In: YES user_id=78178
Unknown Reality also experiences this kind of problems in the Scope part, during subparts "zoomer", "blue blockers" (the twisting bars) and "Jelly Waves" (the green and red vertical bars). What we see there is that every other frame the wrong page is displayed.
In SBB the shaking effect is actually the fact that every other frame a vertically shifted version of the page is shown. I don't know if this is coming from another page or not.
Updated by manuelbi on 2005-10-29 19:22 UTC
- summary: Sex Bomb Bunny screen shakes at certain set adjust values --> Sex Bomb Bunny an UR bugs at certain vertical adjust values
Commented by manuelbi on 2008-05-25 14:39 UTC Logged In: YES user_id=78178 Originator: YES
The problem also manifests itself in the intro of the MCFN music disk Jarretenk.
Commented by manuelbi on 2008-05-25 15:02 UTC Logged In: YES user_id=78178 Originator: YES
Please scratch out that last comment. That disk behaves wrong when it starts on a machine which has not SCREEN 0.80 set in basic, which also happens on a real MSX.
Updated by manuelbi on 2014-09-15 21:08 UTC
- status: open --> closed-fixed
- Group: --> Next_release
Commented by manuelbi on 2014-09-15 21:08 UTC I don't know how or when, but this bug seems to be fixed. I can't reproduce it anymore (tried a 8245 with set adjust (-7,-7) with SBB and UR (using extra RAM).
After a trigger from David/Wouter I tried again, and I could reproduce it with SBB again, but not with UR, in a very quick test.
Sex Bomb Bunny flickers constantly and it's unplayable.
Tested on openMSX-0.14.0 on Mac OS-X 10.11.6.
EDIT: BTW, tested with SETADJUST = 0,0 and 1,1.
Here's a video I recorded that shows how much Sex Bomb Bunny flickers in openMSX-0.14.0, making it unplayable. The video must be watched at 720p 60Hz, otherwise the Youtube player will just skip half of the frames and the problem won't be shown.
With the default adjust (0, 0), Sex Bomb Bunny uses a vertical adjust of -6 (r#19 is 96). It sets line interrupts on line 200 and 230.
That's correct, no update on this issue. (Also none reported here.)
I can reproduce with the following set-adjust values (Y): -1, 0, 1, 2, 3, 4 and 5.
A workaround is therefore, to use vertical adjust of: -7, -6, -5, -4, -3, -2, 6, 7.
@grauw are you interested to help debugging this weird issue?