I just checked my 9122C I happen to have open and the interval between
index pulses is 199.66mS which would be 300 RPM, which is good news for
me I can now proceed with adapting a more common 1.44 drive to replace
my broken one.
Paul.
On 2017-11-17 1:04 PM, Eric Schlaepfer via cctalk wrote:
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 <space...@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@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.
