WTB: HP-85 16k RAM Module and HPIB Floppy Drive

Eric Schlaepfer schlae at gmail.com
Wed Nov 15 18:45:28 CST 2017

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 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.

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