Hi msmeenk, I did some conversions the other way around. I can tell you that (AFAIK) my job is way easier than yours! With 64k RAM I can place the entire ColecoBIOS (patched of course) in MSX RAM.
- Anyway, I created, in asm, an "emulator" of the SN chip. If I remember correctly I had problems with noise, as, the SN chip has an extra bit for frequencies. In the end, instead of mapping the frequencies to a lower range, I decided to just transform coleco noises to tones.
Here's how Tutankham sounds with that emulator:
Check the dying sound ~30s.
Now, I'm working on a conversion of time pilot. I decided to change completely the sounds using original AY sounds made by Toni Galvez.
But something that we're planning to the future is to rewrite the sounds directly on the coleco format without using noise. That would make the conversions way faster.
I see that most games use the BIOS routines @ $1ff1 or $1ff4 (don't remember exactly)
Is there an editor that I could use to edit and/or create sounds directly on that format? Something like the Spectrum tools for the AY's chip?
-> AYFX Editor (http://shiru.untergrund.net/software.shtml)
Thanks in Advance,
Muffie.