Tool to reverse a VGM file (SN76489 only)

[Tom]

So, someone on smspower wanted to know if it was possible to reverse a VGM file, e.g. to make it play backwards. After a first, clumsy attempt, in which I merely reversed the order of all the commands, resulting in something extremely broken, I later decided to waste time on something which probably isn't going to be ever used by anyone, but eh. Since it's related to VGM, I guess I can post it here as well.

Note that the version I am attaching here is "0.1.1" (opposed to the "0.1" on smspower), I did two minor improvements but it's basically the same. I'll align the versions later, hopefully with a "0.2" or something.

I'll release the source code soon, but it's completely uncommented for now and I think it would give everyone a headache.
UPDATE: see post below for version 0.1.2 complete with source code; it's still a complete mess, but I commented it today, so you might be able to read it, I don't promise you won't get a headache anyway, though.

As I said over there, please note:

• PSG only
• uncompressed VGM only
• up to VGM version 1.50

Have fun! Or don't.

[vampirefrog]

Have fun! Or don't.

You can't tell me what to do!

[Tom]

Version 0.1.2 is attached to this post. I took my time to comment my code, which is still confusing, but at least it has comments everywhere now.

I doubt I'll ever work again on this.