On Mon, Dec 5, 2016 at 11:31 AM, Holm Tiffe <[email protected]> wrote: > I've heard from a friend that another friend that died in the menatime, had > managed to copy HP9121 disks on a plain PC with something like Super Copy.
I tried using ImageDisk on a PC to read the two HP 1630 3.5-inch floppies I have (10304 8085 preprocessor, 10342 HP-IB, RS-232C/V.24, RS-449 preprocessor). It appeared to be able to read the expected data just fine. Singled sided disk with 16 256-byte sectors per track (sector numbers 0 - 15) and 70 tracks. But it also seemed to detect a sector number 17 with no data in each track. Is that a normal 9121 low level format? I haven't tried to write a floppy back out using ImageDisk to see if the result is readable on a 9121 drive. I should also try hooking up a 9121 drive to a PC and see if HPDir dumps the same binary data I get using ImageDisk.
