On Mon, Oct 7, 2013 at 1:44 PM, Paul Anderson <useddec at gmail.com> wrote:
> And yes, Ethan, I should have robin buried here along with several sets of
> unopened software.
I hate to see Guy scrap his, but it's too far for me to travel. When
you dig yours
out, let me know. I have friends in your area that I see several times a year
that may be willing to pick up something that small (i.e. - that fits
in the back
seat - I'm sure anything in a rack is out of the question ;-)
-ethan
I'm asking here, but will also bug Nekochan. Does anyone have
schematics for the 240V->48DCV power supplies used by SGI in the
rackmount Challenge XL and Origin systems?
Danke
--
-Jon
Jonathan Katz, Indianapolis, IN.
On 10/07/13 12:00, cctalk-request at classiccmp.org wrote:
> Send cctalk mailing list submissions to
>
> Date: Sun, 6 Oct 2013 20:44:11 -0700
> From: Guy Sotomayor <ggs at shiresoft.com>
> To: "General Discussion: On-Topic and Off-Topic Posts"
>
> (including a VAX 4000/700 I just unearthed today),
I'm going to sit here and cry in my coffee since here is Hayward WI and
there's no way to get there to collect that or anything else... :(
Someday...
William
--
Live like you will never die, love like you've never been hurt, dance
like no-one is watching.
Alex White
Gentlepeople,
I have a VR201 (DEC Pro b/w monitor). It's been stored for a while. I just noticed that the faceplate has spots on it which don't clean off.
More precisely, it looks like they are spots (bubbles?) *inside* the faceplate coating material.
Any suggestions for how to treat this?
paul
Cctalk'ers,
We already announced that VCF East "9.1"* is scheduled for April 5-6 at
our museum in NJ next year. Now, we're announcing a third day! Friday,
April 4 shall be "VCF East University". This will be a
separate-admission event, same venue, at which we'll offer eight how-to
workshops. There will be a hardware track and a software track. Come to
the show and learn vintage computing skills from friendly experts.
Details TBA.
- Evan
* It's 9.1 next year because Hurricane Sandy's after-effects caused us
to cancel 9.0 last spring.
/delurk
Hi all
Do we have a Fortune 32:16 guru on the list? I've searched the
archive and there's some stuff back in 2005 but that's about all I could find.
Reason I'm asking is I unearthed the disks I copied off the
university's Fortune 32:16 back in 1987/88, so I ImageDisked them.
But there's pretty much no information on the hardware out there.
Seems to be an interesting system, Z-80 running I/O, TTL memory
manager, some kind of PAL playing copy protection... would be a pity
if the details have been lost.
W
Hello
In the mid 80ies i was at school in Sk?vde Sweden.
At that time that school had a PRIME 9955 system together with the
normal serial terminals and also a fair number of specialist CAD
workstations.
The CAD stations was used for MEDUSA and another Electronic CAD package
(we did PCB designs in that system.)
I have two questions (because of a foggy memory):
what was the maker of the work stations (or who could they be) ?
and
could someone name a number of pcb design programs for PrimOS ?
Hi, All,
For those that might be following the saga (and especially for those
who chimed in along the way), I wanted to let people know that the
board is running and boots Finder 1.1g off of suitably-formatted
floppies (single-sided MFS).
Despite numerous reports on multiple Mac discussion lists, et al., A
Sad Mac with 6 bits set was corrected by replacing the 6 indicated
chips. I can only imagine that the numerous reported failures that
were unrepaired by replacing the RAMs were problems with bus buffers
or some other thing that dragged down multiple bits on the data bus,
or perhaps traces/vias damaged in the repair pricess. In my case,
thankfully, it was no more than diagnosing and replacing a few chips
(FWIW, I was able to verify that in advance by dry-fitting known good
DRAMs on top of the bad ones and observing a positive change in the
power-on diagnostics).
So that's done, and now it's time to clean and lube the eject
mechanism on an old 400K drive, then turn my attention to getting an
Imagewriter I working again. I'm sure I can make a cable but with any
luck, I already have an official Apple cable in my box of old Mac
parts. Not sure about ribbons, though.
Thanks again for all the suggestions.
-ethan
As you may remember, I'm moving. This has required a significant amount of work
to get stuff packed. I've been making some progress. I have dug out enough to be
able to list *some* of what I have that I don't want to move.
Please make offers. I'll consider anything "reasonable" (I'm not expecting eBay prices
but I'm not going to give the stuff away either). I'm trying not to ship stuff
because frankly I don't have the time. If you're not in the area and really want something
it'll probably be best if you can get someone who's local (San Jose/San Fransisco
California area) to pick it up and get it shipped.
My plan is to get everything moved before October 1. After that anything that I'm not
moving will go to Weirdstuff.
I've put a lot of stuff on pallets for my ease of handling. You'll get a "deal" if you take
the pallet as-is (ie take the lot).
I have a lot of small stuff. Sorry but I can't search for little items. If you come by I'll
let you search through the various piles of stuff but I won't.
OK, so much for the "fine print". Here's a *partial* list:
MicroVAX 3100 (30's, 40s, 80s and 90s)
VaxStation 3100 (I think)
DEC Rainbow 100 (in it's original box...somewhat worse for wear)
Printer for DEC Rainbow
Documentation for DEC Rainbow
HP Apollo (don't know more than that)
12-15 RL01/RL02 drives. I don't know the condition. Some look good, others, well not.
4+ RK05 drives. Most of these don't work (from my notes) but shouldn't require a lot
5-6 Fujitsu Eagle drives. Don't know the condition but they look OK.
2-3 MicroVAX in BA23s
Sun IPX (not sure how many)
Sun IPC (not sure how many)
Sun SS10 (1 or 2)
Sun SS20 (1 or 2)
Sun Ultra 5
Sun Ultra 10
DEC PDP-8/a
SWTPC (no idea what's in the case)
4-5 DECWriter IIIs
2-3 KSR/ASR33s of various types and conditions
Micro PDP11s in various cases. Some are in BA23s, some are OEM cases
3-4 MicroVAXs in BA123
3-4 ADM3a. Don't know the condition
4-5 VT100. Don't know how well they work
4+ PDP-11 11/34s (a couple are still in racks)
2+ PDP-11 11/44s
a few PDP-11 11/84s (I know one is complete. I'm not sure what state the others are)
1-2 PDP-11 11/24s
1-2 PDP-11 11/05 or 11/10 (these are minimal)
a few BA11F chassis (some empty some full of backplanes full of cards)
TU80 tape drive
TU81+ tape drive
3-4 Kennedy tape drives (some in racks)
5-6 RX01/RX02 dual floppy drives
Contact me off-list.
TTFN - Guy
I have powered up the LA36 with the Selenar Graphics board in it, and
>from the information kindly obtained by list members (Byte Magazine
article about the Selenar Graphics II), I have been able to verify that
the unit indeed works. The graphics mode works, and all of the other
features documented in the Byte article seem to function properly.
The issue that I've found is that only 5 of the 7 print pins are
working. Numbered with the top pin as number 1, it is the 3rd and 6th
pins that are either not firing at all, or are jammed such that they
can't come forward enough to make an impression.
I can't find a service manual for this unit online anywhere, so I'm
wondering what the best approach to diagnosis would be. I do have
schematics, but since the unit has a Selenar Graphics II logic board,
I'm not sure how well the schematics will help. Since the Selenar board
replaces the stock logic board, I can safely assume that it retains the
pinouts for the connectors that go from it to the power board that has
the drivers for the solenoids in the printhead. So, I can probably
scope out the drivers to see if they are firing on pin 3 and 6 when
printing characters that require those dots, which I will do when I have
time, but I'm wondering the next step would be if I find that there are
firing pulses coming out of the pin drivers for pin 3 and pin 6.
Obviously, if I find that the pulses aren't being generated, then I have
to dig into the solenoid drivers for these pins and figure out what has
failed and fix it.
If I find that the solenoid drivers are OK, then what should be done
next?
Would it be to remove the printhead and do what Tony suggested, which
would be to use a bench power supply (I have a good Tektronix bench
supply does truly does deliver 0.00V) to try to fire the solenoids to
see if they are gummed up? If so, how do I go about removing the
printhead to do this? Just from looking at things, it looks like I would
have to do a lot of disassembly to get the printhead out of there. Does
the printhead come off separately from the carriage that it rides on, or
do I have to remove the whole carriage assembly?
Any guidance would be most appreciated.
Thanks,
Rick Bensene
