I have a Visual 50 terminal that I am now troubleshooting. I got it in the
late 1980s and it worked fine until 1995. I can't find a good schematic for
it or ROM images. Its symptom is that it powers up to continual beep (solid
tone, not repeated beeps) with a cursor on the screen. This is not in the
troubleshooting table of the manual that I have.
I know the keyboard is capacitive foam pads. I was hoping that was the
trouble, but it is not. I disassembled the keyboard and removed the old
pads, replacing a few with some spares I had from SOL20 repairs.
Has anyone corrected this problem before? I suspect that the EPROMs are
going.
Thanks,
Bill Sudbrink
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> Googling for "mirror uxc.cso.uiuc.edu" found me one hopeful hit:
> https://www.funet.fi > pub > misc > Notes.README
Ron,
Another good search approach that I hadn't thought of. Many thanks!
De
Does anyone have or know of an archive of old mod.sources (predecessor
of comp.sources.unix) posts? I know googlegroups has it, but that only
means nothing since it's effectively inaccessible there.
De
Hi all,
I recently acquired a very nice decwriter III and it seems in good nick. However, the self test "hangs" on the return direction of the second line. Here is a video on it:
https://youtu.be/pj6rk5Dlnbk
Anyone have any ideas where to look? In local mode, it appears to work properly. I haven't tried any external serial connection yet.
73 Eugene W2HX
My Youtube Channel: https://www.youtube.com/@w2hx/videos
Fellow nerds,
not sure who knows about this project, so here an announcement ... again?
As QBUS PDP-11s (03,23,73,83,93, also uVAX) don't have lots of
lamps&switches
like the old UNIBUS machines, their owners suffer on "Blinkenlight envy".
So I was pushed to pimp up the QBUS diagnostic adapter "QProbe"
https://www.retrocmp.com/tools/qprobe
Model "QProbe2023" has now focus on entertainment.
There's a QBUS signal display in style of old PDP-10/12/15 rack header
panels.
It can be build into a 5.25" drive case ... or into the BA23 case itself.
https://www.retrocmp.com/tools/qprobe/327-qprobe2023-overview
By lucky incident you can even see the idle loop pattern of RSX11M+ on some
J11 systems. See a full boot of RSX11M+ at time index 5:56 of
https://www.youtube.com/watch?v=ajAcxGwK-vQ
As it also has RESTART/HALT/AUX switches, it's also helpful for PDP-11s
mounted
case-less in a standalone backplane (like the one at
https://retrocmp.com/projects/lsibox and on the "Frankenstein" video
https://www.youtube.com/watch?v=hoW7Szkppww&t=403s )
Btw for unknown reasons, I cannot register to classiccmp itself ... CC
me direct in your replies.
kind regards,
Joerg
