Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
06660 Graphics Minor Always Aug 14, 2017, 21:12 Aug 15, 2017, 15:08
Tester Kale View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows Vista/7/8 (64-bit)
Status [?] Confirmed Driver megadriv.cpp
Version 0.188 Fixed in Version Build 64-bit
Summary 06660: genesis, megadriv, megadrij [sonic2]: Priority bug for split screen mode
Description The separator line in Sonic 2 split screen mode is supposed to have higher priority than anything else, and masks any sprite/tilemap graphics.
Current emulation instead shows off some spurious gfxs like the tree and Sonic, check attached screenshot.
Steps To Reproduce * Select 2 players vs mode;
* Select any course but special stage;
* Jump with player 1, check gfxs with player 2 display.
Additional Information
Regression Version
Affected Sets / Systems genesis, megadriv, megadrij [sonic2]
Attached Files
png file icon 0042.png (19,227 bytes) Aug 14, 2017, 21:12 Uploaded by Kale
png file icon 0042_correct.png (29,442 bytes) Aug 14, 2017, 21:15 Uploaded by Kale
Correct behaviour, handled thru graphic program
related to 06180Confirmed castlill and possibly castlillj: Certain sprites are wrongly positioned 
User avatar
Aug 15, 2017, 11:00
Yes, the megadrive sprite priority is not perfect yet, as I reported before at 06180, confirmed by Haze.

Castle of illusion and Streets of rage are some games with bad sprite priority, as far as I know.