01555: vanvan, vanvanb, vanvank: Graphics are corrupted.

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/jrpacman.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	van-van_car_01.jpg (43,385 bytes) Nov 26, 2021, 06:00 Uploaded by jkburks Van-Van Car Hardware Photo 01
	van-van_car_02.jpg (157,127 bytes) Nov 26, 2021, 06:00 Uploaded by jkburks Van-Van Car Hardware Photo 02
	van-van_car_03.jpg (271,298 bytes) Nov 26, 2021, 06:01 Uploaded by jkburks Van-Van Car Hardware Photo 03
	van-van_car_PCB.jpg (177,892 bytes) Nov 26, 2021, 06:01 Uploaded by jkburks Van-Van Car PCB

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!
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.
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.
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.
No.19581 jkburks Tester Dec 20, 2021, 23:58
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