Hello.
Do you still have an image of the ROM data?
I would study it a little, as producing a formatter (also using TU58
mechanics but different electronic) would be very interesting...
Andrea
I've disassembled the firmware its not there.
It's not that hard to do
the reason I say modded is the 8085
has only has 256bytes of ram and 2k of rom on the board. So bypassing
the 8085 or extending the memory
and firmware by modding the board for more rom space and maybe ram space
could make the needed
formatter. In the end you need the TU58 board for the drive interface
and motor control.