Originally Posted by R. Belmont
That's interesting. Remember that SOS actually only allows 16 MB on a partition - it uses a signed int16 where ProDOS uses unsigned.
I'm playing with a SOS driver that hooks with a cards Prodos Block driver, so then the card needs to be configured as it would for an A2. It needs some work still as it sometime bumps into the character loading. I have to be careful of that 16mb limit, seems sos is ok with it, but the system utils and some of the programs are not. CFFA2 has the fixed 32mb sizes, so its not ideal, but we don't have many other choices in MAME.

It still seems a but odd with the rom select when running the -debug option. I'm not sure whats going on there. I have temporarily commented out the cfff disable to help me debug my code.