WTB: HP-85 16k RAM Module and HPIB Floppy Drive
spacewar at gmail.com
Thu Nov 16 05:17:40 CST 2017
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.
On Nov 15, 2017 17:45, "Eric Schlaepfer via cctalk" <cctalk at classiccmp.org>
> 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 at classiccmp.org> wrote:
> > > On Nov 14, 2017, at 20:11, Ed Sharpe via cctalk <cctalk at 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
> > 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
> > SS-80 protocols.
> > I’d like to get the 9122C mostly because I have a much easier time
> > 1.44M media than the older double density media. eBay and I don’t talk,
> > 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.
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