preliminary disassembly saving functionality for multi-bank rom

[ale-79]

I think that even if currently Stella cannot create a disassembly that is direclty compilable for bankswitched games, maybe it could allow to save separate disassemblies for each bank (adding a _BANK# suffix to each filename).
Even if they can't be compiled as-is and require furher editing and merging to to make a working disassembly, they would still be useful IMHO.
You could have some message printed in the debugger prompt to make users aware of the issue and even add a disclaimer, and maybe also the bankswicth description, as comment in each generated disassembly file.

[thrust26]

Good idea!

[sa666666]

This is something that I've wanted to work on for quite some time. In fact, when I first got involved with Stella many years ago, my main interest was in getting a debugger and disassembler integrated and working. But something else always comes along, and here I am, almost 17 years later. 😄

[thrust26]

Implemented with d639cdb. You have to take care of the banks saved manually.