Can I use 1200 roms on the 600 or do they need to be 600-specific?
You need A600-secific. It's the same as for A500 or A2000, but not for A1200 (A1200 as two chips, A600 has only one).
Should I just upgrade to 3.1 or stay with a later 2.05?
3.1 is the better choice IMHO.
Does IDEFIX or something like a buffered ide interface fix this problem?
IDEfix (Software) -> yes, but you have to run it from floppy disk because the HDD is not recognised.
Scsi.device from
here used with
LoadModule fixes it, too. You have to run it once from floppy disk after each cold start, then you can boot from HDD.
buffered interface -> no. It's a software (driver) problam. Another hardware cannot fix it.
Bye,
Thomas