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Romhacking => ROM Hacking Discussion => Topic started by: ashramkun on September 27, 2017, 01:10:12 pm

Title: Disable SMS FM sound
Post by: ashramkun on September 27, 2017, 01:10:12 pm
Hello.

I would like to disable the FM support code in some SMS roms. I know that there is some patches that enable this flag to ON. I would like to know if someone could help me identify this code... so I could make a romset without the FM support.

And for those who are asking why I would like to do it, the answers is simple: Because I prefer the PSG sound and my Master system is a Japanese one, and I just can't disable the FM unit.
Title: Re: Disable SMS FM sound
Post by: KingMike on September 27, 2017, 02:00:24 pm
It's probably a fairly simple hack to each game if you know ASM.
http://www.smspower.org/Development/FMChipDetection
Would need to find and modify the code to always return the "no FM" flag.
Title: Re: Disable SMS FM sound
Post by: ashramkun on September 28, 2017, 07:10:03 am
Well, I don't know ASM, but I will try using the tutorial at SMS Power. Thanks!


October 03, 2017, 12:12:27 pm - (Auto Merged - Double Posts are not allowed before 7 days.)
Success. I talked with some people at SMSpower and they helped me to understand the process. Thanks again!