My reply didn?t show up for some reason... resubmitting:
It should directly in TSX-Plus . Make sure your current memory limit is
56K.
See below for my attempt. BTW TSX should only use RT11 to ?boot?.
TSX doesn?t run over RT11SJ in this version. TSX replaces all the OS code.
.sh memory
?...
Current job memory limit = 56Kb
Maximum job memory limit = 64Kb
.sh ver
6.20
.run advent
WELCOME TO ADVENTURE!! WOULD YOU LIKE INSTRUCTIONS?
-----------------------
It turns out I have (at least the pack that?s in the drive) TSX-Plus 6.16,
not 6.50.
But ADVENT does work now. I have to admit to ?operator error?
The bootable XM pack is currently in drive 0, and the bootable SJ pack with
TSX-Plus is in drive 1.
Somehow I?d forgotten to copy one of the ADVENT files from one pack to the
other. So when I rebooted from DL1: it couldn?t find ADVTXT and crashed!
Anyhow it does now run (on both the console and the other time-sharing
terminal). Thanks for the information, though.
-Charles
I have a PDP-11/23+ with 4 MB RAM and two RL02 drives. I can boot RT-11XM,
then run VBGEXE and start ADVENT with no problem.
But TSX-Plus 6.50, at least the version I have, has to run over RT-11SJ, and
VBGEXE reports "Wrong version". And ADVENT won't run by itself (without
VBGEXE), whether SJ or XM.
So is there any way to run ADVENT while running TSX-Plus?
thanks
Charles
OK, so it's sort-of computery. I snagged a JAMMA arcade board from a
recycling pile a couple of days ago (this is an m68k-based early 90's
board). Supposedly it's faulty, but I don't know the nature of the fault -
maybe it's just RAM or a reset problem or something, so I figured I'd put a
little bit of time into it.
Anyway, I'm having a hard time finding details about the video output - I
know it's negative composite sync (I got the manual, which says that much),
and I *think* it's TTL levels (right?), but I'm not sure about frequencies.
Then there's the RGB outputs - analog, but I'm not seeing anything that
tells me peak voltages.
I suppose the question is, what's the easiest display to try and hook this
up to? I've monitors with an assortment of inputs (VGA, EGA, CGA, MDA,
mono-composite), and I think there's a CRT TV kicking around that has a
composite input too (and maybe S-video, not sure). It doesn't bother me if
the quality's not great; I'm just interested in whatever's quickest to
interface to at this stage, just to see if I can get something working.
cheers
Jules
A run to a dark corner of Orange County yielded a Sun 4-260 and a
DecServer 550. After loading the 4-260 the DecServer 550 seemed like a
feather.
Also in the pile to be collected, a stash of Hitachi ESDI drives of some
sort (full high 500mb) Probably will be selling them.
The storage circumstances was a bit rangy but beggars can't be choosers.
Thanks
Jim
One of my DECserver 90M PSUs got dropped and stopped working as a result,
possibly because it got pulled by the cable. That sounds like the kind of
damage that might be repairable. I tried to open the enclosure and I found a
hole under one of the labels, expecting it to be a screw hole, but it isn't.
I am guessing you just have to pry the halves apart, but without knowing
where the clips are inside it is easy just to break the thing.
Does anyone know how you open these PSUs?
Thanks
Rob
PS Yes I know these PSUs are notoriously unreliable, and that you can make a
PSU with a DIN plug and a wall wart, but I would still like the original to
work if possible.
Hi Folks,
Does anyone have a electronic copy of the original Decmate Owner?s Guide (AA-K330C-TA) that they could share?
Alternatively, can anyone describe what can be accomplished (if anything) from the initial ?Setup? prompt on a VT278 *without* any disks attached?
The situation is that Brent and I are trying to resurrect a Decmate ? we?ve plugged in a VT100 keyboard (Thanks, Bill!):
- it boots to the ?Setup? prompt with the flashing cursor.
- the ?Power? light on the rear of the unit is steady and the ?CPU OK? light is blinking.
- the keyboard lights indicate ?online"
- pressing ?2? or ?PF3? cause ?Setup? to disappear. ?3? seems to cause it to perform some self-test like procedure.
- most keys cause keyclicks, but ?space?, ?M?, and ?/' don?t. With an oscilloscope, we can see data from the keyboard being sent for the ?silent? keys, however.
Without disks, what else should we able to do?
Eventually, we?d like to find or construct some solution for mass storage, but we?re still at the point of checking out the VT278 itself.
Thanks,
Rob Ferguson
>
> Date: Mon, 12 Oct 2015 18:29:11 +0000
> From: tony duell <ard at p850ug1.demon.co.uk>
> Subject: RE: PDP-12 Restoration at the RICM
>
> > We swapped the TU56 and TU55 drives between the PDP-12 and the PDP-8/I.
> We
>
> Does the TU55 work correctly on the 8/I ?
>
Yes, it works perfectly. It even worked OK after we put it back in the 8/I.
> > The TU55 behaved a little better than the TU56, and sometimes would
> > actually boot OS/8. We continued chasing the issue and found glitches on
> > data channel 3. We have swapped every module and cable that relates to
> data
>
> What exactly do you mean by 'glitches'? Are these on a TTL level signal,
> an analogue
> output of the read amplifer, or what?
>
You can see the logic analyzer trace of many of the TC12 signals here.
<https://4310b1a9-a-11c96037-s-sites.googlegroups.com/a/ricomputermuseum.org…>
The labels at the far left of the image include the backplane slot and pin
number for the probe location. The signals were TTL level by the time the
logic analyzer saw them.
Have you looked for glitches on the other data channels?
>
Tracks 1 & 2 look fine. We swapped the probes for track 2 & 3 just to make
sure that it wasn't a logic analyzer problem. A 'scope connected to the
differential signals shows the same track 3 glitches. The glitches were
present with the TU55 and the TU56 tape drives. We used different control
and data cables for the TU55 and TU56. We swapped the G882 modules between
tracks, and from the TC01 in the PDP-8/I and did not see a change. We
swapped the W603 module in slot F16, the R107 in F12, and the W512 in F13.
The LTR WRITE ON L signal is inactive and stable. We tried several tapes,
including ones formatted and written by DEC and the glitches are present on
track 3.
-tony
>
--
Michael Thompson
Hey guys,
Posting this to various forums in the hopes of finding someone in the know -
I have this ASCI u68 system (6800 cpu) that I understand was used in
educational environments. I kind of have it running but know little about
assembly language programming, etc. Or the unit itself. Have any of you
ever messed with these? It looks like it has a serial connector on its
mainboard.. was trying to figure out a way if I could patch it to one of my
terminals.
Also trying to find some simple 6800 assembly programs/routines to test it
and see if it really works properly. There is an MC6821S chip on it (there
are three of them actually) and one in the middle is marked 'BAD'. I
understand those handle peripherals.
I'd also heard rumours there was a second board available for these that
gave them BASIC. I've never seen such a board for sale anywhere - wondered
if anyone had seen one in the wild.
Brad
