My 9845B came with a 3rd party mass storage ROM
module. I am told this
allows the use of HPIB disks (probably Amigo protocol). The main use of
it so far has been due to the fact that it was a little PCB with normal
chips on it, not an HP hybrid. Very useful for figuring out what the ROM
module connections are.
Did you ever try to connect your machine to one of the earlier
5,25"-amigo-drives (like the 82901 or the 9135A)? These drives should be
supported by your 3rd party ROM, and have the charme they should be able
to read disks produced by a standard 5,25" PC drive in combination with
the Teledisk utility from
www.hpmuseum.net, where a couple of nice 98x5
software archives is provided as well. The transfer alternative is a
crude procedure decribed at the said site.
-Ansgar