11 Nov
2017
11 Nov
'17
8:29 a.m.
I have successfully built a rl02 disk using pdpgui on a windows XP laptop,
the newer version works on window 10. All you need other than the software
is a serial card like a m7800. Pdpgui acts as a gui. Do you have a m9312
rom/terminator card with a terminal console rom?
Bill Degnan
twitter: billdeg
vintagecomputer.net
On Nov 11, 2017 7:04 AM, "Aaron Jackson via cctech" <cctech at
classiccmp.org>
wrote:
Well, some progress.
It seems that a terminator is not required so long as the cable is VERY
short. The controller RLV12 controller appears to have a few termination
resistors on it anyway. There is no fault light appearing and the drives
spin up fine. Mine cable is less than 20cm and the PDP is sitting just
on top of the drive.
I can see that the drive is communicating because the lsb of the csr
changes flips between 0 and 1 when I load and unload the drive.
I wanted to try and dump the disks using vtserver, but when I run the
copy program I end up with the following
]] Enter name of input record/device: rl(0,0,0)
]]
]] Can't get rl(0,0,0) sts
]] rl(0,0,0) err cy=0, hd=0, sc=2, rlcs=142205, rlmp=0
]] rl(0,0,0) error reading labelsector
]] Enter name of input record/device:
The same happened on both packs - they have both been cleaned and look
as though they are in good condition. The heads have been cleaned too.
Given that the drive appears to be communicating with the PDP-11, where
might this problem come from?
Thanks,
Aaron.
Aaron Jackson via cctech writes:
Hi everyone,
I have managed to hook up an RL02 drive to my PDP-11 (thanks to Dave
Wade for the drives) . This took me longer than I thought it would - I
tried with a flat ribbon cable with a DIY terminator going straight into
board , but couldn't get it to work. Removed the terminator, and the
fault light turned off. So that's positive.
I tried to load a cartridge, which I had cleaned, inspected and
generally appears to be in good condition. It started to spin up and I
could hear it getting faster, but after 30-40 seconds the fault light
returns. I made a short video demonstrating this:
https://www.youtube.com/watch?v=japwBBodO8U
According to the manual the fault light can appear for the following
reasons:
- Drive select error... Surely this would come on at the start?
- Seek time out error... I'd have to hear the heads move first
- Write current in heads during sector time error... Same as above
- Loss of system clock... The fault light would be on from the start.
- Write protect error... I don't think it got that far
- Write data error... Same as above
- Spin error... Is this the only remaining fault?
So could the only cause be a spin error? I am wondering if the belt is
slipping or something like that?
Can anyone offer some advice?
Thanks,
Aaron.
--
Aaron Jackson
PhD Student, Computer Vision Laboratory, Uni of Nottingham
http://aaronsplace.co.uk