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

[Eric Schlaepfer]

Check your email. How can you tell if it uses a 600 RPM mechanism or not?

On Thu, Nov 16, 2017 at 3:17 AM, Eric Smith <spacewar at gmail.com> wrote:

> 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 at 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 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.
>> >
>>
>