06642: arcadia and all clones: Background colour incorrect with some cartridges

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06642	Color/Palette	Minor	Always	Aug 4, 2017, 14:38	Aug 4, 2017, 20:34

Tester	wallyweek	View Status	Public	Platform	MAME (Self-compiled)
Assigned To		Resolution	Open	OS	Linux (64-bit)
Status [?]	Confirmed			Driver	arcadia/arcadia.cpp
Version	0.188	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06642: arcadia and all clones: Background colour incorrect with some cartridges
Description	Few cartridges of Arcadia 2001 console (and clones) show wrong background colours (sprites look right to me). This is especially visible with both versions of Jump Bug.
Steps To Reproduce	mame arcadia -cart jumpbug.zip 1. When the system boots up you'll see the foreground is yellow (shoud be black). 2. If you wait some time, you'll see that the lower part of the screen starts cycling through different colours: this is right, but should happen to all the background 3. Press F5 to start a new game (you'll notice the background will briefly change to black before turning back to yellow)
Additional Information	Just in case, WinArcadia shows the background colour right. Source code is freely available: http://amigan.1emu.net/releases/
Github Commit

Flags
Regression Version
Affected Sets / Systems	arcadia and all clones

Attached Files	0001.png (2,450 bytes) Aug 4, 2017, 14:38 Uploaded by wallyweek Gameplay with wrong colour: red sprite on red background...
	0002.png (2,207 bytes) Aug 4, 2017, 14:40 Uploaded by wallyweek Right colours (just after pressing F5 to start a new game)
	0003.png (2,778 bytes) Aug 4, 2017, 14:43 Uploaded by wallyweek Wrong background (first screen after starting a new game)
	0000.png (2,962 bytes) Aug 4, 2017, 14:44 Uploaded by wallyweek Right after system bootup

No.14068 Tafoid Administrator Aug 4, 2017, 16:13	I'm not claiming MAME's color emulation is correct or not but when expressing something is wrong, it is always best to reference recordings from original hardware or screenshots (when available) rather than another emulator.