Can anyone identify the text formatting program that the following is
meant for? Looks kind of like nroff, but it's not (particularly those
@-leadin sequences):
CHAP5
\format,16,60,66,8,60
\define,ref $&1
\title,c=- #p -
\block,i8
\nojust
\setu1
\seth at A
\setss[]
\seto!
\double
\page211
\blank
\skip10
\center,b,u,=Chapter 5 at D Biomass, Production and the Fishery
\skip6
15.1 Introduction1
\setu1,notblanks
A general review of the central and upper Amazon fishery has been
attempted based on comparative yield data (Bayley 1981).
Thanks for any pointers,
Chuck
A member of my staff has an Ultra5 that's destined for e-waste unless someone from the list wants it. FFS or pick it up in Santa Rosa, California.
--
Christian Kennedy Ph.D.
chris at mainecoon.com AF6AP | DB00000692 | PG00029419
http://www.mainecoon.com PGP KeyID 108DAB97
PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97
"Mr. McKittrick, after careful consideration..."
Dear listeners of this list and too whom it may concern or might be interested,
due to support my Thatched Roof Restauration Project at Indiegogo http://igg.me/at/reetdach I'm going to sell at lot of stuff from my collection:
There are PDP11 Systems: 11/23Plus, 11/24, 11/34, 11/44, 11/73, 11/84 and 11/93. Either only the cpu or as complete systems with disk drives or RL drives, e.g. there is a DecSystem with a 11/23Plus and two RL02, nice 11/84 Systems in a dual rack layout, which can be placed underneath an office desk.
There are H960 Racks with RK05 drives.
Additionally VT100 Terminals, RA drives, RC 25 drives and media, Tape drives, spare boards, RL drives and media, RX01 and 02 Spares.
Manuals and documentation.
There are some SMD drives (Fujitsu), a RP06 drive.
Furthermore I'm offering NEXT Stations (mono and color) and MicroVaxen, mostly SCSI System (dual BA23 Systems). Additionally "bigger" Vaxen.
More: Tektronix Storage Tube Display, Tektronix Computer, Wang Computer.
And HP1000 System like A700 and A900, HP 1000 E/F CPUs and spare boards
There are some HP9845 Computer.
Feel free to contact me off-list.
If you are willing to spend some $/? to my campaign, I possible will be able to order the roofer at the beginnig of October.
Andreas
I'm currently restoring a couple of VT100 terminals. After checking the
power supplies over and replacing the odd capacitor on the output side
I've had both of them running on a dummy load. They seem to work OK but
I've noticed that R27, which is a large 13W power resistor, gets quite
hot after only a few minutes of being powered on. This resistor is part
of a snubber circuit on the primary side of the main transformer. After
about 5 minutes I measure a temperature of around 95C (200F) on both
power supplies.
Another component that appears to have been quite hot over time (burnt
PCB) is R55, but perhaps this is just an underrated part?
Does anyone have a VT100 and can confirm whether this is 'normal' operation?
Many Thanks,
Matt
-----Original Message-----
On 01/09/2014 19:45, Charles wrote:
> I'm having really bizarre hardware problems with my 8/A (M8315/6/7, 32K,
> programmer?s panel, limited function panel, two RL02?s, OS/8). Most of the
> time it works perfectly, including last night, but today it began refusing
> to boot OS/8 again.
>
> If I toggle in a short program (say, to read the keyboard and echo to the
> printer) it works. So far so good.
>
> BUT if I hit the boot key (which doesn't boot correctly, although it does
> access both RL02's briefly), then halt the system, then run the test
> program, I can see while single-stepping that after two instructions it
> jumps to location 0 instead and thereafter into space!!
>
> Even more oddly, halting the system again, then running the test program
> again, works normally without the unwanted jump to location 0... every
> time. Until I hit BOOT, halt, and try and run it, then it jumps away
> again...
>
> The only thing that occurs to me right away is that power-fail & restart
> has an option to jump to address zero. But I've got that option turned
> off. Time to get out the logic analyer and scope... unless this weirdness
> is something you've heard of before? Any hints appreciated!
>
> thanks
> Charles
>
I have a PDP-8/A which I've been slowly repairing for some time now. I
got to the stage where I could run simple programs from the console or
>from virtual paper tape but trying to boot from floppy or running OS/8
would result in symptoms like you describe. The last time I powered it
on however, the console was totally unresponsive. After doing various
checks I found that there was excessive ripple from the power supply and
the -5V in particular was a mess. I haven't got round to investigating
this problem yet. I would check the power supply first with the scope
and go from there. It's probably best to check it under load too, like
when you press the boot key.
Matt
-------------------------------------
Thanks, but that's the first thing I always check... PS voltages are fine.
I learned some more today... interrupts make a JMS 0 and somewhere in the
boot process, apparently OS/8 is enabling interrupts. Both the RL8A
controller card and the SLU (console TTY port) can interrupt (and in fact
the SLU was creating the interrupt) . Explicitly disabling interrupts with
an IOF before running the echo program eliminates the jump to 0.
Does anyone know if OS/8 uses the interrupt facility of the RL8A controller?
Not sure if this is a problem or not with the interrupts also coming from
the console and holding the int request asserted...
However.
More possible clues: at one point I was applying finger-tip pressure to the
RL8A card, hit the boot switch and OS/8 came up! I started listing a
directory, which worked fine until I let go the pressure on the board - the
system crashed immediately. Can't get it to boot again except it will print
"V" on the tty instead of the "." prompt and it won't do anything else
(endless loop in zero page but ultimately waiting for drive at a
skip-on-done instruction).
Ran some diagnostics. DJKKBA (CPU exerciser) ran 8 passes without a failure.
DHKMAD (memory checkerboard) also ran until I got tired of waiting. AJRLHA
(RL seek/fctn) works on both drives. But - AJRLIA (read/write) on a scratch
pack fails immediately. Then I unloaded the drives and tried AJRLAC (RL8A
diskless diagnostic) a.k.a. controller card test - MANY failures all
involving the middle 4 bits of the 12 bit data starting with DAR - silo. If
this were an interrupt problem it'd be all bits, not the middle nibble!
So I believe that a 4-bit TTL device (buffer, RAM, ?) on the card has
failed. Hoping for a bad solder joint which would explain how flexing the
card temporarily fixed but then made it worse. More likely a defective IC
(pin or bond wire inside the plastic DIP). E13, an 8234, is the first
suspect the next time I feel like wrestling with this.
Anyone got an RL8A (M8433) card I can buy or borrow?
thanks
Charles
I have one AT&T 1600/6250 in a rackable case (no rails.) There is no
obvious model # but it's an HP rebadge, likely of the 88780. It has
the Pertec (non-SCSI) interface so it's of limited use to me but may
be a good fit for a minicomputer. Other than powering up, I haven't
tested it, having no suitable interface, but it looks clean. If I
have time I may be able to run a blank tape through its self-test
routines.
Pickup is in the NW Chicago suburbs (60070.) If you're coming in for
VCFMW, that would be a perfect time. It's a bit heavy to bring down
to the show but home is not too far from the venue.
-j
I'm having really bizarre hardware problems with my 8/A (M8315/6/7, 32K, programmer?s panel, limited function panel, two RL02?s, OS/8). Most of the time it works perfectly, including last night, but today it began refusing to boot OS/8 again.
If I toggle in a short program (say, to read the keyboard and echo to the printer) it works. So far so good.
BUT if I hit the boot key (which doesn't boot correctly, although it does access both RL02's briefly), then halt the system, then run the test program, I can see while single-stepping that after two instructions it jumps to location 0 instead and thereafter into space!!
Even more oddly, halting the system again, then running the test program again, works normally without the unwanted jump to location 0... every time. Until I hit BOOT, halt, and try and run it, then it jumps away again...
The only thing that occurs to me right away is that power-fail & restart has an option to jump to address zero. But I've got that option turned off. Time to get out the logic analyer and scope... unless this weirdness is something you've heard of before? Any hints appreciated!
thanks
Charles
And furthermore, does anyone have any documentation on it? I'm curious
as to what it looked like inside. The only thing I could find was a
PDF about a very early Ada compiler for it.
--
Thanks,
Kevin
Hello all
Since we got 4 of them, allw ith a broken power supply, I was wondering
if someone has already stumbled upon a solution. i have not open them
yet, but i think the problems are the same on all of them. googling on
hp150 is not the way to go unless you want info for modern devices
having 150 in their names...
--
Met vriendelijke Groet,
Simon Claessen
drukknop.nl
Just to hastily follow-up and divert everyone's attention from my
miss-fired reply (meant for Andreas and not the list), I found a
recent bitsavers document which suggests the drives I have (Emulex
SD590s) are not SMD drives as I originally thought, but DEC SDI (the
host side is DSA a forerunner of MSCP?) - something I've never heard
of before.
Is anyone familiar with these drives that might know if the KDA50-Q
controller is suitable?
(EK-KDA5Q-UG-001_KDA50-Q_Users_Guide_Nov84.pdf)
http://bitsavers.informatik.uni-stuttgart.de/pdf/emulex/SM9050501-A_SD59X_S…
I get the impression these drives were really intended to be used with
VAX-BI based systems and I will be out of luck trying to get them to
run on a simpler QBUS MicroVAX system.
