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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
04926 Speed Major Always Jun 23, 2012, 04:03 Jul 9, 2012, 18:10
Tester LordFlux View Status Public Platform MESS (Official Binary)
Assigned To Kale Resolution Fixed OS Windows Vista/7 (64-bit)
Status [?] Resolved Driver
Version 0.146 Fixed in Version 0.146u3 Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary MESS-specific 04926: tg16, pce: Slowdown when playing CD based games
Description Gameplay is slow even though emulation is running at 100%.

Have tested and bug shows in each game:

draculax - Akumajou Dracula X - Chi no Rondo (SCD)(Jpn)
gradius2 - Gradius II - Gofer no Yabou (SCD)(Jpn)
fstreet - Fighting Street (CD)(USA)
Steps To Reproduce Play CD based PCE/TG16 game using:

mess64 pce -cart scdsys -cdrm draculax
mess64 pce -cart scdsys -cdrm gradius2
mess64 tg16 -cart cdsys -cdrm fstreet
Additional Information Video of Gradius II slowdown:
Github Commit
Flags
Regression Version 0.145u5
Affected Sets / Systems tg16, pce
Attached Files
 
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User avatar
No.08773
Tafoid
Administrator
Jun 23, 2012, 15:30
Found regression version and suspected changes that caused error:
MESS SVN r14810, r14811 involving ADPCM irqs and flags.