Implementing multiple mappers on a cart would be a difficult (or perhaps impossible) task. Only one mapper was used at a time on a cart as there was no need to be so insane. It is expected/recommended that the bitpack for an OHC specifies which expansion chip to use for an NSF+ compo, unless there is some other strong theme to keep the entries coherent.
Accepted file format
Playback (for voting)
Apart from the tools you can use for creation, also:
- NSFplay and VirtuaNSF (version 18.104.22.168 is recommended)
Render to MP3
<<describe how an entry can be rendered t an MP3. Don;t go into a step-by-step description unless really necessary. Refer to the appropriate tools instead>>