28 Mar
2002
28 Mar
'02
10:57 a.m.
At 07:40 PM 3/28/02 +0000, you wrote:
I am wondering how on earth you can cure the 'classic' dried up grease
fault on the loading mechanism and _not_ look at the internals of a
drive. You have had that fault I trust. If not, you're the only owner of
such drives who hasn't....
Actually I've never had that problem on a 9114, only on the double sided drives.
That must be due to the difference in climate. But to get to your point, I have taken
drives out and cleaned and regreased them but I never looked at the electronics that
closely. In fact, I take the easy way out when cleaning the drives, I hold the bare drive
up and pour alcohol over the mechanical section then go over it with cottom swabs to
remove the grease then rinse with alcohol and let dry. After it's dry I regrease the
pivots and wear points. Then I clean the heads and reinstall the drive. Removing and
reinstalling the drive takes longer than cleaning it does.
The 9114A, 9121, 9122 (not C, I guess), 9123, 9133, etc
use a full-height
Sony disk mechanism. This one will not work with HD disks because the
disk-inserted sensor (a spring-loaded flag and a slotted optoswitch on
the motor PCB) lines up with the density select hole on the HD disk. The
result is that the drive thinks no disk is inserted.
I've never looked the internals of the drive but that certainly
makes sense since the error message returned says that there is no media
in the drive.
But yes, you get a No Medium (or similar) message, for the obvious reasons...
Agreed. 128K will hold a lot of HP41 (or HP67-converted-to-HP41)
programs.
It's the same capacity as the 82161 tape drive, of course. Just that the
disk drive is faster, and more importantly the media is easier and
cheaper to obtain. The fact that you can read the 9114 disks in a PC with
the right software is an added bonus.
Agreed. Once you've used a 9114 you'll never willing touch a tape drive again
IMO!
Joe
ROM to
send DDL and DDT commands to the 9114 to create such a file. I've
not bothered -- 128K on a single disk is still plenty of space for an HP41...
128K is a HUGE space for a HP 41! The 41 only has 2.2k of RAM!
-tony