Viewing Issue Advanced Details
|ID||Category [?]||Severity [?]||Reproducibility||Date Submitted||Last Update|
|06067||Graphics||Minor||Always||Nov 7, 2015, 14:44||Dec 9, 2015, 00:52|
|Tester||system11||View Status||Public||Platform||MAME (Official Binary)|
|Assigned To||Kale||Resolution||Fixed||OS||Windows Vista/7/8 (64-bit)|
|Version||0.167||Fixed in Version||0.169||Build||64-bit|
|Summary||06067: 64street, 64streetj: 64th Street - missing background graphics interaction|
Long standing bug I can't actually see a report for. In 64th Street the majority of the backgrounds can be destroyed by throwing enemies into them, half or more of this is missing in MAME, is this anything to do with the priority PROM I dumped a while back - presumably this could be caused if there was an overlay layer appearing behind the normal backgrounds or in front?
Have uploaded a poor quality video which shows this in action:
|Steps To Reproduce||Every game, throw an enemy into background elements.|
|Flags||Verified with Original|
|Affected Sets / Systems||64street, 64streetj|
|There are no relationsihp linked to this issue.|
Nov 8, 2015, 20:27
FWIW, it was the same behaviour also before you dumped the priority PROM and the game used the hand-made priority structures which I personally fixed for this game at least 10 years ago. So my guess is that there's something unemulated in video hardware, probably a sort of sprites-bg collisions detection register that if enabled starts to draw the modified bg layer.
On a side note, the only game that still uses the hand-made priority method is Chimera Beast. It would be great have that PROM dumped too.
Dec 9, 2015, 00:52
|Breakable stuff is writing to a VRAM mirror area.|