Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
06740 Sound Major Random Oct 29, 2017, 18:25 May 3, 2018, 03:43
Tester Kale View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows Vista/7/8 (64-bit)
Status [?] Acknowledged Driver dec0.cpp
Version 0.191 Fixed in Version Build 64-bit
Summary 06740: slyspy, bouldash: Sound randomly speeds up and eventually dies
Description In both these games sound have issues on certain conditions (same sound HW)
In Sly Spy, between stage 7 and 8 transitions sound starts to oddly speed up, and might eventually lock up completely with a stuck tone.
In Boulder Dash this can occur between stages 2-3 and 2-4
Steps To Reproduce Play Sly Spy up to stage 8 or Boulder Dash up to 2-4
Additional Information Regression version around 0.106 and 0.121, where HuC6280 sound CPU has been downclocked from 3 to 2 MHz.
Also provided inps:
For Sly Spy WolfMAME 0.190 is used on secretagj set.
For Boulder Dash WolfMAME 0.191 is used on bouldashj set, I've continued on 2-4 just to make the bug to occur.
Regression Version
Affected Sets / Systems slyspy, bouldash
Attached Files
zip file icon (125,681 bytes) Oct 29, 2017, 18:25 Uploaded by Kale
zip file icon (438,606 bytes) Oct 29, 2017, 18:29 Uploaded by Kale
related to 00389Confirmed cbuster: The tempo of the music played by one of the OKI6295's (#1 I think) speeds up when the flamethrower is used 
related to 06974Resolved cninja: Sound speeds up when fighting with the stage 4.2 boss 
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Oct 29, 2017, 23:44
Reminds me of Crude Buster where certain sound effects caused the sound to speed up and then go back slow 00389.
Might be related somehow?
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Oct 30, 2017, 10:24
Good catch, both shares same CPUs and an IRQ tied to a Yamaha sound chip.
There must be something in the CPU execution that makes it to behave strangely ...
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Apr 30, 2018, 23:09
Sly Spy speed up sound bug has been fixed in mame 0.192.
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May 3, 2018, 03:43
Actually worked around by changing the sound CPU clock, not fixed.
Changing this to acknowledged.