ScummVM 2.0.0 - Error: Adding PCM ROM failed

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Digitoxin
Posts: 9
Joined: Tue Aug 07, 2012 2:20 am

ScummVM 2.0.0 - Error: Adding PCM ROM failed

Post by Digitoxin » Tue Dec 19, 2017 6:16 am

When using ScummVM 2.0.0 with the MT-32 Emulator, I get the following error message:

"Error: Adding PCM ROM failed. Check that your PCM ROM is valid."

Everything works fine if I go back to the previous version of ScummVM. I am using the exact same folder structure and layout and configuration with both versions of ScummVM. Nothing has changed except for the version of ScummVM I am using.

digitall
ScummVM Developer
Posts: 954
Joined: Thu Aug 02, 2012 1:40 pm

Post by digitall » Tue Dec 19, 2017 9:19 pm

Odd. Are your ROM files named as follows and have the same MD5sums?
abe0982e4f662f881affa7d8a932c739 MT32_CONTROL.ROM
89e42e386e82e0cacb4a2704a03706ca MT32_PCM.ROM

Can you also indicate which platform i.e. Windows, OSX, Linux that you are using and whether you got the new v2.0.0 build from our downloads page?

Digitoxin
Posts: 9
Joined: Tue Aug 07, 2012 2:20 am

Post by Digitoxin » Wed Dec 20, 2017 12:14 am

Turns out one of the ROM files was corrupt. Have no idea why the previous version of ScummVM wasn't picking up on the incorrect checksum though.
digitall wrote:Odd. Are your ROM files named as follows and have the same MD5sums?
abe0982e4f662f881affa7d8a932c739 MT32_CONTROL.ROM
89e42e386e82e0cacb4a2704a03706ca MT32_PCM.ROM

Can you also indicate which platform i.e. Windows, OSX, Linux that you are using and whether you got the new v2.0.0 build from our downloads page?

digitall
ScummVM Developer
Posts: 954
Joined: Thu Aug 02, 2012 1:40 pm

Post by digitall » Thu Dec 21, 2017 2:25 am

Probably as the older version of Munt in-built did less validation.

If you need to redump your MT-32 EPROM chips, then there is a hardware design here to do this which I used:
https://github.com/digitall/eprom_reader

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