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 Post subject: FDS wave
PostPosted: Tue Mar 08, 2005 2:14 pm 
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I'm not sure where to put this, so move it as seen fit. :P

Anyway, I would like to extract the FDS waveforms from lots of games that use it. The raw waveform. Raw. That means no holding the mic to the speakers. :P Now, I would rather not have to rip apart the PRG rom to find these waves, so is there any emulator or something that supports viewing the fds waveform from wherever it is in ram?

Thanks


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PostPosted: Tue Mar 08, 2005 8:33 pm 
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From the little bit I've read about FDS sound, what you'll find in an FDS game's ROM is a recipe rather than a blueprint for the waveform. A recipe tells what to put in, but not what it will look like, while a blueprint is a scale drawing of the final result.


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PostPosted: Wed Mar 09, 2005 9:03 am 
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Look at the bottom of Chris C's page.

http://www.zyx.com/chrisc/creations.html

According to that, you should be able to get the waveform from a memory dump at $4040-$407F.


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PostPosted: Fri Mar 11, 2005 3:00 pm 
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But no emulators with ram viewers will let you see it. :(
Let alone dump it. :P


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PostPosted: Fri Mar 11, 2005 5:14 pm 
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They won't run that demo either (I didn't try it)? Sounds like the emulators are broke, then. :)

Hey, I bet you could use a debugger to do a breakpoint when it writes to those memory areas. Then write down each byte value, though that'd be kinda tedious.


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PostPosted: Sat Mar 12, 2005 6:31 pm 
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I guess I could try that, it's better than nothing.

It's only 64 bytes. :D


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 Post subject:
PostPosted: Mon Mar 14, 2005 12:09 am 
Drag wrote:
But no emulators with ram viewers will let you see it. :(
Let alone dump it. :P


You need to disable sound output by setting a certain bit for the carrier wave RAM to be accessible to the CPU. Look it up in an FDS document. :b


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