Viewing Issue Advanced Details
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.cpp
Version 0.188 Fixed in Version Build 64-bit
Summary MESS-specific 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

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:
Regression Version
Affected Sets / Systems arcadia and all clones
Attached Files
png file icon 0001.png (2,450 bytes) Aug 4, 2017, 14:38 Uploaded by wallyweek
Gameplay with wrong colour: red sprite on red background...
png file icon 0002.png (2,207 bytes) Aug 4, 2017, 14:40 Uploaded by wallyweek
Right colours (just after pressing F5 to start a new game)
png file icon 0003.png (2,778 bytes) Aug 4, 2017, 14:43 Uploaded by wallyweek
Wrong background (first screen after starting a new game)
png file icon 0000.png (2,962 bytes) Aug 4, 2017, 14:44 Uploaded by wallyweek
Right after system bootup
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User avatar
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.