" Because, honestly, who saves .DO/.CA/.CT files to cassette anymore regardless, much less from within SuperROM??) "
Only if the bits ended up running on CloudT :-) I hook cassette I/O for file transfer in and out of the emulator. CloudT only supports M100 right now and of course it's not a real model T. Switching OptROMs is easy so it doesn't really need these super-duper-ROMs. Would be good to have some of these ultrascreen enabled variants with cassette I/O still there. -- John.
