Hi Eric, It's not urgent, but when you have a chance, could you dump the 9122C ROM(s) and take high resolution photos of the controller board?
Since it does HD, I suspect it probably does not use a 600 RPM mechanism. Thanks! Best regards, Eric On Nov 15, 2017 17:45, "Eric Schlaepfer via cctalk" <cctalk@classiccmp.org> wrote: > It'd be interesting to find out how well that PRM-85 works. I've laid out a > board for a rough equivalent but I haven't fabbed it out. It may be cheaper > for me to buy that instead. > > I've also got a 9122C but I don't have the mass storage ROM so I can't use > it with my 85. Right now I'm using it with my 9000 series 300. > > On Tue, Nov 14, 2017 at 8:26 PM, Mark J. Blair via cctalk < > cctalk@classiccmp.org> wrote: > > > > > > > > On Nov 14, 2017, at 20:11, Ed Sharpe via cctalk <cctalk@classiccmp.org > > > > wrote: > > > > > > wondervifcthec9122 drives,will work on 85? > > > > > > > I think I can guess what you meant to say there... :) > > > > I’ve ordered a PRM-85 (a modern reprogrammable ROM drawer replacement) > > which includes the HP-85B version of the Mass Storage ROM, and the > Extended > > Mass Storage ROM. Based on what I have read, I think that should let my A > > model use the newer 9122C drive, and other drives using either the Amigo > or > > SS-80 protocols. > > > > I’d like to get the 9122C mostly because I have a much easier time > finding > > 1.44M media than the older double density media. eBay and I don’t talk, > so > > that limits my options a bit. If I had easy access to lots of 3.5” DD > > media, then I would consider getting one of the more plentiful (?) other > > 3.5” HPIB floppy drives. > > >