I have a 9825A, but do not have any of the I/O or Extended I/O ROMs.
Would I be able to use a 98026A serial interface of 98032A parallel interface without these ROMs? I know I wouldn't have the formatting abilities, but could I (for example) install the 98032A parallel interface, connect it to an old Epson printer, and just use "list #" to print program listings?
Failing that, does anyone have an I/O ROM for the 9825 they'd like to sell?