Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
01555 Graphics Minor Always Mar 20, 2008, 02:24 Dec 21, 2021, 00:03
Tester totalfreedom75 View Status Public Platform MAME (Official Binary)
Assigned To hap Resolution Fixed OS
Status [?] Resolved Driver pacman.cpp
Version 0.123u6 Fixed in Version 0.141u4 Build Normal
Fixed in Git Commit Github Pull Request #
Summary 01555: vanvan, vanvanb, vanvank: Graphics are corrupted.
Description There are several graphics glitches present on the screen in attract mode and during play.

I've dowloaded previous versions of Mame and it seems that the problem first occurs on Mame 0.91 but it was less important. I've recorded a video in which you can see the game running on Mame 0.90 (left screen and no glitches), Mame 0.91 (center screen - only minor graphics glitches [player's car and when you destroy an ennemy car) and Mame .0123 (right screen - severe graphics glitches [same problems with 0.123u6]) so you can judge yourself.



Cheers,
Steps To Reproduce
Additional Information
Github Commit
Flags
Regression Version 0.115u4
Affected Sets / Systems vanvan, vanvanb, vanvank
Attached Files
jpg file icon van-van_car_01.jpg (43,385 bytes) Nov 26, 2021, 06:00 Uploaded by jkburks
Van-Van Car Hardware Photo 01
jkburks
jpg file icon van-van_car_02.jpg (157,127 bytes) Nov 26, 2021, 06:00 Uploaded by jkburks
Van-Van Car Hardware Photo 02
jkburks
jpg file icon van-van_car_03.jpg (271,298 bytes) Nov 26, 2021, 06:01 Uploaded by jkburks
Van-Van Car Hardware Photo 03
jkburks
jpg file icon van-van_car_PCB.jpg (177,892 bytes) Nov 26, 2021, 06:01 Uploaded by jkburks
Van-Van Car PCB
jkburks
Relationships
related to 08141Acknowledged  dremshpr: various unemulated graphics effects 
Notes
6
User avatar
No.00273
Tafoid
Administrator
Mar 20, 2008, 02:47
Confirmed regression version on the major graphics corruption is 0.115u4. We might need to separate this report into two to address the 0.91 issues as they don't appear to be needing the same fix. I'll keep together for now.

By the way, nice video comparison!
User avatar
No.07334
hap
Developer
Mar 24, 2011, 12:17
Ok, background is assumed to be black.

If anyone has solid PCB proof that the game actually does have the ability to change bgcolor (black/gray), please post it here.
User avatar
No.19493
jkburks
Tester
Nov 26, 2021, 06:06
edited on: Nov 26, 2021, 06:06
Adding photos from auction site. Van-Van Car uses the same main board as Dream Shopper / Red Selector. The emulation for both games has incorrect display of background colors and lacks transparent pixels on the main character sprite.
User avatar
No.19499
Haze
Senior Tester
Nov 26, 2021, 16:09
edited on: Nov 26, 2021, 16:11
this is more confusing, because aside from the blue used on the flags, the only other blue in the palette is the more cyan colour, used for the text at the top, which clearly isn't the same as the background.
User avatar
No.19581
jkburks
Tester
Dec 20, 2021, 23:58
User avatar
No.19582
Haze
Senior Tester
Dec 21, 2021, 00:03
edited on: Dec 21, 2021, 00:04
so more purple in that one.. again not in the palette.

I wonder if there's just an r/g/b register hidden somewhere in RAM for the background colour, or some other set of resistors dedicated to it.

could be MAME has a mirror installed for something else and writes are going elsewhere so we're not seeing them