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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
07100 Sound Minor Always Sep 17, 2018, 16:28 23 days ago
Tester anemostat54539 View Status Public Platform MAME (Self-compiled)
Assigned To Resolution Open OS
Status [?] Acknowledged Driver
Version 0.201 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 07100: A sound like howling appears in ZSG 2 + DSP built with VS2017
Description I built MAME's zn.cpp on VS2017 and confirmed the sound of raystormj. Then, I noticed that sounds like howling were mixed in all the sound tests.
Steps To Reproduce 1. make SUBTARGET=zn SOURCES=src\mame\drivers\zn.cpp
(Make sure that MSBUILD can be executed before compiling)
2. start zn64.exe -window raystormj
3. enter test mode, and sound test
4. play any song
Additional Information When I looked it up, I understood that the problem occurred with the following code of DSP.
src/devices/cpu/tms57002/tmsinstr.lst Line:220

lmhc 1 33 1 n
lmhc %c
macc_write = macc = ((int64_t)(int32_t)%c) << 16; <- this

lmhd 1 31 1 n
lmhd %d
macc_write = macc = (int64_t)((int32_t)(%d)) << 16; <- this

It seems that there is a problem with casting to int64_t.
Github Commit
Regression Version
Affected Sets / Systems
Attached Files
7z file icon zn64.7z (3,807,949 bytes) Sep 17, 2018, 22:31 Uploaded by anemostat54539
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User avatar
Sep 17, 2018, 19:30
If the problem is in the DSP core, can you confirm that it also happens (or a similar DSP-related issue) in konamigx.cpp games?

If it does not occur, can you check what happens when the DSP is bypassed (ie, sound routes directly from ZSG-2 device in mame/audio/taito_zm.cpp)
User avatar
Sep 17, 2018, 22:11
edited on: Sep 17, 2018, 22:31
In konamigx built with VS2017, both x86 and x64 were not reproduced. (Using gokujyo parodius for testing)

I can't test direct sound route changing. attach zn64 with VS2017 x64 build exe file.