Well, I can officially stop complaining. I've just scored a software
engineering position with a local natural gas production company. This will
have three effects with respect to the ClassicCmp list:
* I will no longer gripe about lack of funds in nearly every post. :-)
* My collection will experience growth and an increase in quality, which
hopefully will enable me to do things like software and documentation
archiving, hardware testing and restoration, and of course, playing with
shiny new toys.
* You should see me start to offer free stuff to list members soon.
Yes, today is a good day.
--
Jeffrey Sharp
Wow!
I think we've all had a wack at poor Phil.
Hi Phil
I think the most important thing is to save the board
over saving parts. If you think you've lifted a trace that is a
thru hole( and these are two sided boards ), take a piece
of wire wrap wire through the hole and solder it to the
topside of the board and it goes through the hole.
Don't solder it in the hole. Make sure that the component
lead will fit through. When you put the part in,
fold the piece of wire down so even if you heat it
enough to melt the solder on the top, it won't
rotate.
If the top trace is clearly visible with the lead
in there, you can solder the lead from the top. Use
an Ohm meter to verify that you've made connections
to all the right places.
Dwight
Hi all,
Well, it looks like I've finally destroyed the Ace. I've just spent the
past hour trying to desolder the dead RAMs and buffers from the Ace's main
PCB. Unfortunately it looks like the board was designed to self-destruct
when anyone tried to repair it.
The pads appear to have been designed to peel off on the application of
heat, they're less than 5 mils around the hole (what do you think that
means?) and they don't even seem to be through-hole plated. The tin plating
was applied straight on top of oxidised copper - I've had to retin some pads
and tracks courtesy of that major screwup.
In my opinion, the Jupiter Ace is one of the most appallingly-made
machines I've ever tried to repair. Heck, the Commodore 64 was bad, but at
least the pads were easy enough to desolder. It looks to me like Jupiter
Cantab's PCB designer was either *VERY* inexperienced or just wanted to make
sure that no-one could fix an Ace if it failed. It's also beginning to look
like the ROMs are stuffed, but that shouldn't be too hard to sort out --
I've just bid on some 2532 EPROMs on eBay from someone in Austria.
Does anyone know how I could rescue this machine? It looks like the RAMs
are definetly fried, along with some of the logic as well. Font RAM and
Video RAM are still not being loaded on startup so the output of the video
generator is still 100% noise, however it *is* changing when the machine is
powered off and then back on again. I'm shotgunning all the RAMs (there's
only six of them) and the bus muxes.
Has anyone here either repaired one of these machines or got a spare Ace
to sell me? I've got a proper PSU now, with only one connector (the jack
plug the Ace uses), so I can say with near absolute certainty that the same
mistake will not occur again.
Later.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
I totally agree.
Remember the concept of the $99 computer. You dont sell a computer for $99
if it costs
you $150. I suspect that commercially, the cost breakdown probably went
something like this:
$99.00 Final RRP (Margin + Freight + Wholesale price)
$30.00 Sales Margin (30%)
$ 5.00 Distribution freight
$65.00 Wholesale price
$65.00 Wholesale price (Margin + freight + Sinclair sell price)
$ 9.75 Wholesale Margin (15%)
$ 2.00 Wholesale freight
$53.25 Sinclair Sell Price
$53.25 Sinclair Sell price (Manufacture cost + R&D Recovery + Sinclair
Margin)
$10.65 Sinclair Margin (20%)
$10.65 R&D Recovery (20%)
$31.95 Manufacture cost
$31.95 Manufacture Cost (System + Plugpack + Lead + Manual Printing)
$16.00 Component Parts
$ 1.35 Membrane Keyboard
$ 3.00 Modulator
$ 1.60 Case
$ 3.00 Plug Pack
$ 1.00 Video Cables
$ 1.00 PCB
$ 2.00 Assembly Charges
$ 2.00 Manual Printing
$ 1.00 Packaging (foam etc)
These figures have been fudged to fit, but you can see that at $99 there is
basically *no* rooe to provide any type of quality.
Just my thoughts, don't flame me too hard!
Doug Jackson
Director, Managed Security Services
Citadel Securix
+61 (0)2 6290 9011 (Ph)
+61 (0)2 6262 6152 (Fax)
+61 (0)414 986 878 (Mobile)
Web: <www.citadel.com.au>
Offices in Melbourne, Sydney, Canberra, Hong Kong, Boston
> -----Original Message-----
> From: J.C.Wren [mailto:jcwren@jcwren.com]
> Sent: Wednesday, December 11, 2002 7:19 AM
> To: cctalk(a)classiccmp.org
> Subject: RE: One more screwup with the Ace...
>
>
> Phil,
>
> Most likely the board was designed for low cost. If there is no
> soldermask, larger annular rings increase the chance of solder bridges
> during manufacturing. But more likely, smaller annular rings
> were used to
> reduce the amount of solder needed, thus lowering the cost.
> I don't believe
> they Ace nor the ZX81 nor any of that genre of computers was
> designed to be
> repaired. They were designed to be produced as cheaply as possible.
>
> --John
>
> -----Original Message-----
> From: cctalk-admin(a)classiccmp.org
[mailto:cctalk-admin@classiccmp.org]On
Behalf Of Philip Pemberton
Sent: Tuesday, December 10, 2002 15:04
To: cctalk(a)classiccmp.org
Subject: One more screwup with the Ace...
Hi all,
Well, it looks like I've finally destroyed the Ace. I've just spent the
past hour trying to desolder the dead RAMs and buffers from the Ace's main
PCB. Unfortunately it looks like the board was designed to self-destruct
when anyone tried to repair it.
The pads appear to have been designed to peel off on the application of
heat, they're less than 5 mils around the hole (what do you think that
means?) and they don't even seem to be through-hole plated. The tin plating
was applied straight on top of oxidised copper - I've had to retin some pads
and tracks courtesy of that major screwup.
In my opinion, the Jupiter Ace is one of the most appallingly-made
machines I've ever tried to repair. Heck, the Commodore 64 was bad, but at
least the pads were easy enough to desolder. It looks to me like Jupiter
Cantab's PCB designer was either *VERY* inexperienced or just wanted to make
sure that no-one could fix an Ace if it failed. It's also beginning to look
like the ROMs are stuffed, but that shouldn't be too hard to sort out --
I've just bid on some 2532 EPROMs on eBay from someone in Austria.
Does anyone know how I could rescue this machine? It looks like the RAMs
are definetly fried, along with some of the logic as well. Font RAM and
Video RAM are still not being loaded on startup so the output of the video
generator is still 100% noise, however it *is* changing when the machine is
powered off and then back on again. I'm shotgunning all the RAMs (there's
only six of them) and the bus muxes.
Has anyone here either repaired one of these machines or got a spare Ace
to sell me? I've got a proper PSU now, with only one connector (the jack
plug the Ace uses), so I can say with near absolute certainty that the same
mistake will not occur again.
Later.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
CAUTION - The information in this message may be of a privileged or confidential nature intended only for the use of the addressee or someone authorised to receive the addressee's e-mail. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this email in error please notify postmaster(a)citadel.com.au. Any views expressed in this message are those of the individual
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Feel free to visit the Citadel Securix website! Click below.
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On Dec 10, 23:14, Philip Pemberton wrote:
> Dwight K. Elvey wrote:
> > If you use a solder sucker, don't use a small one.
> > Use one with as big a bore and stroke as you can find.
> Hmm... I've got an Antex (www.antex.com) "PRO-DESOLD" black desolder pump
in
> my toolbox. I take it that would be better than a roll of Soder-Wick
(sic)?
Depends how big it is; the bigger the better (within reason). Practise on
a board you can afford to live without, and see. The syringe-style sucker
I keep in my kit in the car, and the one I keep most handy on the bench,
are about 1" diameter and about 9" long. I have a much smaller one
somewhere, but it's so long since I last used it, I couldn't tell you
where.
--
Pete Peter Turnbull
Network Manager
University of York
Hi Phil
If you know a part is bad and you want to remove it
>from the bard with the least damage, clip the leads
close to the part and then remove the leads, individually,
with a pair of tweezers/iron. Always use a temperature
controlled iron set to the point that a clean tip
will melt the solder of the joint in about 10 to 15 seconds.
Even really cheap PC board can be reworked if one
uses some care in methods. I don't recommend using solder
wick. Many do well with it but it tends to get stuck
to traces if not overly heated and will lift traces.
If you use a solder sucker, don't use a small one.
Use one with as big a bore and stroke as you can find.
Dwight
>From: "Philip Pemberton" <philpem(a)dsl.pipex.com>
>Hi all,
> Well, it looks like I've finally destroyed the Ace. I've just spent the
>past hour trying to desolder the dead RAMs and buffers from the Ace's main
>PCB. Unfortunately it looks like the board was designed to self-destruct
>when anyone tried to repair it.
> The pads appear to have been designed to peel off on the application of
>heat, they're less than 5 mils around the hole (what do you think that
>means?) and they don't even seem to be through-hole plated. The tin plating
>was applied straight on top of oxidised copper - I've had to retin some
pads
>and tracks courtesy of that major screwup.
> In my opinion, the Jupiter Ace is one of the most appallingly-made
>machines I've ever tried to repair. Heck, the Commodore 64 was bad, but at
>least the pads were easy enough to desolder. It looks to me like Jupiter
>Cantab's PCB designer was either *VERY* inexperienced or just wanted to
make
>sure that no-one could fix an Ace if it failed. It's also beginning to look
>like the ROMs are stuffed, but that shouldn't be too hard to sort out --
>I've just bid on some 2532 EPROMs on eBay from someone in Austria.
> Does anyone know how I could rescue this machine? It looks like the
RAMs
>are definetly fried, along with some of the logic as well. Font RAM and
>Video RAM are still not being loaded on startup so the output of the video
>generator is still 100% noise, however it *is* changing when the machine is
>powered off and then back on again. I'm shotgunning all the RAMs (there's
>only six of them) and the bus muxes.
> Has anyone here either repaired one of these machines or got a spare
Ace
>to sell me? I've got a proper PSU now, with only one connector (the jack
>plug the Ace uses), so I can say with near absolute certainty that the same
>mistake will not occur again.
>
>Later.
>--
>Phil.
>philpem(a)dsl.pipex.com
>http://www.philpem.dsl.pipex.com/
>
>
I just found one of these in a load of scrap. It appears to be similar to the HP 9000 200 and 300 series computers and uses the same DIO cards but also has a built in CRT and floppy and hard disk drives. It's designed to be rack mounted and it's supposed to have a fold down keybaord but the keyboard is missing on this one. Fortunately the unit uses a HP-HIL keyboard socket so I can plus in a regular HP_HIL keyboard. Has anyone here used one of these? Are they supposed to show a list of installed memory and interfaces when they power up like the 9000 200s do? I'm not getting any display on the CRT but I can see the sweep and retraace lines on the CRT when I turn the brightness all the way up so the CRT is working. The hard drive light illuminates for several seconds then the floppy drive accesses for a split second so the system seems to be working but still don't get any display on the screen.
Joe
>From: "Philip Pemberton" <philpem(a)dsl.pipex.com>
>
>pete(a)dunnington.u-net.com wrote:
>> On things like that, I often don't even try to rescue any suspect ICs
>> or even passives, just cut them off close to the PCB with a very fine
>> pair of sidecutters, and then desolder the stub of pin.
>That's what I've been doing. I've been desoldering using "Soder-Wick" - I
>got a small reel of it for 90p.
>
>> First thing is to make sure anything you remove is replaced with a
>> good quality socket
>I didn't have any decent sockets - I had to cut two Maplin "economy DIL
>sockets" down to size, fitted two RAMs, then ran out of sockets. In order
to
>limit damage to the ICs due to heat, I gave them a quick blast of freeze
>spray and then soldered them.
Hi
REAL BAD IDEA! This is just about the worst thing
you can do. Most silicon IC's can take a lot of heat
applied slowly. Thermal shock making a large range
of temperature change is real rough on them and more
likely to fracture the IC or cause the lead seals
to fail.
>
>> and if necessary that you can repair any damaged
>> tracks with stripped wirewrap wire or similar.
>None of the tracks are stuffed, the pads seem to have come up because the
>solder wick stuck to them and pulled them up, even though the wick was
still
>heated.
This is why I never recommend using solder wick unless you
are vary experienced at desoldering. You need to know the right
size and the right touch of applying the heat with this
material. I do 95% of my desoldering with a sucker and
only the last special cases with wick. I have three different
sizes of wick to select for each job. I use different heat
ranges as well.
>
>> How adept are you
>> with a soldering iron?
>Six years of experience, three with a Maplin elcheapo, three with my Antex
>XS25 (25 watt).
Rework is not the same as soldering. Rework is a special
talent. When you can remove a 25 pin D PC type D connector
>from a 4 layer board with half of the pins connect to large
internal traces, without damaging to board, you can consider
yourself a reworker.
You absolutely shouldn't be using an non-temperature controlled
iron for rework.
Dwight
>
>> Did you get the 2114s and Z80 I sent you? They should have arrived
>> this morning.
>Yup, they arrived this morning. Fitted them and the random, static garbage
>has been replaced with scrolling garbage. Grr...
>I replaced four out of the five 74LS367s too - no dice. The bloody thing is
>still being stubborn.
>
>As for your offer to have a look at it, I might just take you up on it.
I've
>got a schematic for it (drawn by Bodo Wenzel) for a clone of the Ace, some
>bits are different, 90% of it is the same though.
>
>Thanks.
>--
>Phil.
>philpem(a)dsl.pipex.com
>http://www.philpem.dsl.pipex.com/
>
>
>With terminators on 1) the 2nd ports of the HP88780B and on the 2nd
port of the KZSA I got nuthin'
This, I guess, is how it is supposed to be connected.
>However, when I pull the terminators from everything, I get:
> >>> show scsi
>SCSI Adaptor 0 (761300, SCSI ID 7)
I assume you don't have the tape set up as ID 7?
Things would get pretty upset if you did that!
Do you have any other known good SCSI device that
you can drop onto the KZQSA (on its own) to see
verify that the KZQSA itself is good? A CD-ROM drive
would be ideal but even a disk would do.
Antonio
On Mon, 9 Dec 2002, Don Maslin wrote:
>>Rich, I can likely accomodate you on the SD disk. Are you looking
>>for CP/M or N*DOS? - don
Don:
I'd like to get both since none of the disks I have work. For more
specifics, contact me off list.
Thanks.
Rich
> -----Original Message-----
> From: Carlos Murillo [mailto:carlos_murillo@epm.net.co]
> Sent: Monday, December 09, 2002 11:49 PM
> To: cctalk(a)classiccmp.org
> Subject: Re: VAX wanted in Bristol, UK
>
>
> At 01:30 PM 12/9/02 -0800, you wrote:
> >On Erebus, they use pressurized drive canisters for external
> SCSI drives.
> >At Pole, they don't do anything special. Drives die all the
> time. To
> >add insult to injury, massively dry air holds a lot less
> heat than the
> >air you and I are breathing right now - computers and hard
> disks frequently
> >die from overheating at the South Pole - the air is thinner and drier
> >and can't conduct as much heat away from CPUs and drives.
>
> Quite frankly, to have a system die of heat exhaustion _there_ seems
> ludicrous. As long as the assembly can withstand a steep temperature
> gradient, there's lots of cooling available, with temperature low
> enough to compensate for the decrease in specific heat many times,
> right?
>
> carlos.
>
>
> --------------------------------------------------------------
> Carlos E. Murillo-Sanchez carlos_murillo(a)nospammers.ieee.org
>
Actually, having flown a high altitude ballon experiment over Antarctica,
it's the combination or less air to
conduct heat away from the source (A VERY big problem at 100K ft.), combined
with the intesity of the radiation
>from the sun (being filtered by less atmosphere as Ethan states) and the
reflection from the ice.
Our expeiment actually used nitrogen pressurized chambers with a optical
WORM drive. It turned out we could
pressurize the chanbers to about 1.75 atmospheres, then the optical drives
would crap out. We suspected the
pressure somehow deformed the lenses in the laser system.
(aside)
The optical drives were manufactured by a company called Cherokee systems in
CO. They purportedly militarized
the drives for aircraft, and could withstand low pressure. When the drives
first arrived, after unpacking, we
opened one of the drive doors, and a 2 inch moth flew out. After having
some porblems, we call support, and
mentioned the bug to them, and they responded, "Yeah, we're having a very
bad year with the mothes this year!"
I should have know then how buggy the drives system was going to be!
************************************
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Actually, the 7-whatever number sounds like a CDC part number... if they are
FSDs, there will be, somewhere on the label, a model number of PAxxx, if
either of you find one of these legends, let me know because I have most of
the FSD manuals... Blah on ditching SMD for SCSI, if anything I want MORE
SMD disks, though for my Perkin-Elmers, not my DECs...
Will J
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In doing a bit of inquiry as to the desireability of the various surplus
UYK40 and 44 computers, I found that the K-40s are all being replaced as
fast as possible by the current UYQ-70 system, made by Lockheed Martin in
Minnesota.
You can check out this system at: www.q70.com quite a fascinating look
at what the next generation's collectible surplus looks like today.
Cheers
John
I have a few 386 motherboards here that I want to get rid of. They are
free for the taking, or I will ship them to anywhere if you cover the
costs.
All are as is, but should have been working when removed from service.
I have the following:
- AMD 386 SX-40, AMI Bios, "Cyclone" chipset?, 6- 16 bit ISA slots, 4- 30
pin SIMM slots. This board is smaller than normal boards. It measures 8.5
x 6.75 inches.
- AMD 386 SX/SXL-25, AMI bios, VLSI chipset?, 7- 16 bit ISA slots, 8- 30
pin SIMM slots. Underside has a part number MB-1316/20/25VST.
- Intel 386 SX-20, AMI Bios. "Chips" chipset?, 6- 16 bit & 2- 8 bit ISA
slots, 8- 30 pin SIMM slots. This board is larger than normal, 13 x 8.75
inches. This is from a WYSE PC, and has some custome WYSE chips in it.
Also looks like the AMI bios may be a custom WYSE job (at least it
carries a WYSE part number). I don't know for sure if this one can be
brought back up to working. It might have needed some ISA cards with it
(which I don't know where they are, but I know I had some WYSE ISA cards
for things like the drive controllers).
2- AMD 386 SX/SXL-25, AMI Bios, Opti chipset?, 6- 16 bit & 2- 8 bit ISA
slots, 4- 30 pin SIMM slots.
If anyone wants any of these, or parts from them, let me know. There are
no math co-processors on them (but all 5 do have sockets for them). The
WYSE board has what may be socketed cache chips (OKI, M514256A-80R, and
OKI M51C256-80).
-chris
<http://www.mythtech.net>
Hello, all:
I'm working with Scott LaBombard to get my N* system (which is
mostly made up of Vector parts) working. This has been an on-and-off project
of mine for years, but I enlisted Scott's help since I can't seem to make it
work.
After slogging through all the parts, re-configuring everything, and
doing some testing, we've found that I need either a N* single-density boot
disk or an MDS-AD/AD2/AD3 double-density controller. It seems that when I
got this machine a few years ago, the person must have had multiple N*
systems and sent me only double-density disks (common) for a single-density
(more rare) equipped system.
Can someone help me out with this? Does anyone have a spare N* DD
controller?
Thanks in advance. We're pretty close on this one.
Rich
!!!!!!
No thanks.
---------- Forwarded message ----------
Date: Sun, 08 Dec 2002 09:04:52 -0800
From: shirin <shirin(a)shaw.ca>
To: William Donzelli <aw288(a)osfn.org>
Subject: RE: AN/ UYK-20X(V)
Original purchased Price: $90,554 USD
I am selling these for $24,000 each
Following is the list of accessories:
It.
1. AN-UYK-20X(V)[PARA] Production Type 1600[PARA]Data Processing Set 1
2. SE610-AV-MMO-010 GFM Operating and Maintenance With Part List 1
3. SE610-AV-MMO-020 GFM Reference Data 1
4. SE610-AV-MMO-020 GFM Equipment Diagrams Part 1&2 1
5. SE610-AV-MMO-050 GFM Diagnostic Programs 1
6. SE610-AV-MMO-060 GFM Diagnostic Program [PARA]Listing Basic test 1
7. SE610-AV-MMO-070 GFM Diagnostic Program [PARA]Listing Basic test Special
IO 1
8. SE610-AV-MMO-080 GFM Confidence Tests 1
9. PX1302-0-6 Hardware Users Guide 8K 1
10. 7101943-02 STD Parallel Conn, Input 2U45 8
11. 7101943-03 STD Parallel Conn, Output 2U45 8
12. 7101943-05 Conn Serial 188C 6
13. 7128073-01 Maintenance Kit, Elect Equip 1
14. 7150314-01 Power Connector 60HZ 1
15. 7163304-00 Air Plenum ASSY 1
16. 7101943-06 Conn Serial RS-232C 2
60 Hz supply
Weight: 334 lb
They are complete and fully operational brand-new with military standards in
original packing.
Open to offers.
I am located in Canada and the computers are in stock Dubai, UAE
-----Original Message-----
From: William Donzelli [mailto:aw288@osfn.org]
Sent: Saturday, December 07, 2002 4:14 PM
To: shirin
Subject: Re: AN/ UYK-20X(V)
> I have 9 brand new AN/ UYK-20X(V) in stock. Any one interested?
> Original package plus all accessories.
Yes. How much, and where are you located?
William Donzelli
aw288(a)osfn.org
I just got a new acquisition -- a PDP11/73 (born an 11/23 plus but
upgraded) -- up and running.
Its running RSX-11 v4.6 and I found a useful tidbit which may come in
handy to others since I had no info on accounts on this machine and
have limited experience with RSX-11 (I was a RSTS, UNIX and VMS guy wrt
machines of this era):
As it booted, several well-timed ^C's as tasks were being installed got
me to an MCR> prompt where I could run $ACNT and make myself an account
so I could log in.
Re: making accounts, it was a trip to see the "depth" of account info
and security on the machine. :-)
Its an interesting little machine:
M8192 PDP-11/73 processor
M8043 DJV11-J 4-port async
M3104 8-port async
Emulex HD controller (not SMD) -- model not (yet) known
Emulatex tape controller (ibid) for Cipher 3200/1600 bpi 9track tape
drive
512KW memory (no name or number on board -- only a sticker that says
"made in hong kong")
M7504 DEQNA
Cipher model M890340-96-1050U tape drive
KPV-1180 Parallel Line Printer Controller
Printronix P6000 ~400lpm line printer (biiig data center cabinet ..
dot matrix, circa-1985)
It has some flavor of winchester that looks to the OS like an RA81 (but
is a 5/25" HDA -- I haven't disassembled every part of the rack yet).
Also in its low-boy case are two CDC SMD "Fixed Storage Disks" disks
(27"+ deep, > 50 lbs, SMD interface) for which I have an empty slot but
no controller for. The model # on the disks is: 72859381.
Does anyone have any ideas on these disks and what kind of controller
would bring these CDC disks back to life..? (anyone got controllers to
trade? I have all sorts of goodies...) Als, any online pointers to
maint manuals for the tape drive..?
regards,
David
------------------------------------------------------------------------
-
David HM Spector spector(a)zeitgeist.com
software architecture - network/security consultation
technical due diligence - technology planning/analysis
Office:(631)261-5013 Cell: (631)431-5756
As for who would still be needing -20's, my money is on NATO (and non-NATO)
countries who have purchased older warships from us. Just because the US
government doesn't need them does not mean that no other goverments need
them.
Will J
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Phil,
> I'm not even sure they are 2532s (they might be 2732s).
> They're TI branded and carry the part numbers "ACE-A"
> and "ACE-B". I don't have an EPROM programmer either...
I have copies of the ROMs for the ACE.
Lee.
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To quote from http://www.montagar.com/hobbyist/mount.html
"OpenVMS Hobbyist CD Media
The OpenVMS Hobbyist Kit V2.0 is currently available. You must be a member of
a participating DECUS/Encompass Chapter before you can order an OpenVMS
Hobbyist Kit. You can order the kits on-line via our web site, or via mail
order. At this time, OpenVMS VAX media kits are sold out. If you are still
interested in getting OpenVMS for your VAX, you may try borrowing a CD from a
friend, co-worker, local Encompass LUG, Ebay, or other places. Please note
that any OpenVMS distribution is legal to use with the Hobbyist Program (as
long as it's not stolen!)."
Does anyone have one or know an FTP site?
If one can get real DEC VMS CD's will the hobbyist license PAKs work or do
you need the hobbyist CD?
On Dec 8, 22:06, Christopher McNabb wrote:
> Does anyone have a list of the IOT instructions (and what they do) for
> the TD8E simple dectape controller?
67x1 SDSS Simple DECtape skip on Single Line flag
skip if Single Line flag is set
67x2 SDST Simple DECtape Skip on Time Error flag
skip if Time Error flag is set
67x3 SDSQ Simple DECtape Skip on Quad Line flag
skip if Quad Line flag is set
67x4 SDLC Simple DECtape Load Command Register
load Command Register from AC
clear Time Error
start UTS delay if UNIT, DIRN, or STOP/GO flip-flops
are changed
67x5 SDLD Simple DECtape Load Data Register
load Data Register from AC -- do not clear AC
clear Single Line and Quad Line flags
67x6 SDRC Simple DECtape Read Command Register
load contents of Command Register, Mark Track Register,
and Status bits into AC
clear Single Line and Quad Line flags
67x7 SDRD Simple DECtape Read Data Register
load contents of Data Register into AC
clear Single Line and Quad Line flags
Unit numbers:
Unit 0,1 use opcodes 677x
Unit 2,3 use opcodes 676x
Unit 4,5 use opcodes 675x
Unit 6,7 use opcodes 674x
This is on page 8-4 of the PDP-8 Maintenance Manual, Vol.3, which you can
get from David Gesswein's excellent website.
--
Pete Peter Turnbull
Network Manager
University of York
All items $1.00 plus shipping unless otherwise specified.
-PW2 Unisys Multiple Port Board, has two 16C452 serial ports and 1
parallel port, with driver disk, cable, and manual
-Gateway ISA video card with docs and drivers (5.25" HD), ATI Ultra/A,
ATI 38800-1
-486 AT motherboard model 486-PVT, I think it is a FIC, 7 slots, 2 with
VLB extensions, socket 3
-generic PC plastic adjustable sidestand
-decently built 5.25" bay to 3.5" floppy converter from old Gateway
386..... much better than the little flimsy things at the computer shows.
-Teac 32x cd-rom model CD-532-E (IDE, barely used) $15
-"The Longest Day" on RCA Selectavision Video Disk (CED) (2 disk set)
-"Tora Tora Tora" on RCA Selectavision Video Disk (CED) (2 disk set)
-Paradise/WD 16 bit or 8 bit ISA 256K VGA card
-Alaska by James A. Michener, hard cover, a bit musty smelling, but not
too bad.
-IBM XT motherboard, supposed to be last bios revison, and was purchased
by me as such. $10
-AC 120mm 10 blade fan (loud and vibrates a bit too much for solid
mounting I think, real nice fan though)
-2 fan trays for the R400X DEC expansion chassis with fans
$10 for both
-SCO Open Desktop 2.0.0 on Qic tape with license certificate
$5
For pick up only:
-large AT server case built by Tandy, for Grid, for the Government.
This case will hold a fullsize AT MB without it being underneath any
drive bays or the power supply. Power supply has temp sensor and will
adjust fan speed. Many drive bays. Very Nice case, I just don't need
it anymore. Originally housed a EISA bussed 486. $10
Please reply off list
Chad Fernandez
Michigan, USA
Take a look at this <http://home.cfl.rr.com/rigdon14/mds800-3/blue-w~1.jpg>
I went scrounging Thrusday and went to my favorite scrap yard. I knew I was in trouble as soon as I drove into the place! Everywhere I looked I saw blue. Intel blue! I don't even know how many I bought. I've made two trips bringing it back so far I estimate that over 60% is is still there! The stuff in the picture is PART of what I've brought home so far. The LH stack has a MDS-230 and MDS-225, In front of that is an iUUP EPROM programmer and two MDS keybaords. The next stack has an OLD Intel terminal and a MDS-225. The third stack has a MDS-230, a Mostek dual 8" floppy drive box and an Intel DDR external 8" floppy drive box. On the right is a homebrewed S-100. In front is a SWEAT MDS-800. As you might have guessed from the picture, this stuff is sitting outside. The OL says that I HAVE to clean the house out before Christmas. I have another DDR drive chassis and a big stack of loose Multibus cards inside the house. I found the Multibus cards in a basket of cards that were going to be ground up for the gold scrap. I still at least two more MDS-2??s, a MDS-800, another Intel terminal, several external drive chassis AND (drum roll, please) a dish washer sized Intel external hard drive to pick up.
For you heathins, there was also a huge pile of other classic computers. I bought a BBC Acorn, a home brewed S-100 crate, two Morrow external 8" floppy drives, a so far unidentified STD-Bus computer, five new Shugart SA-1004 8" hard drives, AT LEAST 20 Shugart 8" floppy drives, a Wicat computer, four different and FUNKY programmers panels, a rack mount dual 8" floppy drive box made by Mostek, a old but clean Centronics printer, a loaded Cromemco Z-2D, an Osborne OCC-1, a nice 80 TPI 5 1/4" floppy drive in an external case and a mass of other stuff that I can't even remember!
I left behind a huge pile of Xerox 820s including external floppy and hard drives, an unidentified Xerox computer that's wider than the 820, a Multibus computer chassis made by Advanced MicroComputers (I think they're a subsidary of AMD) I later found the cards for the AMC computer in the pile of Multibus cards that I dug out of the gold scrap bin so I may go back and get it. Also left behind a GenRad 2300 Advanced Developement System with it's external dual 8" floppy drives and an external expansion chanssis. I wasn't sure what it was but later fround that it's a CPM system. Looks interesting but probably hopeless trying to find docs and SW.
To top it all off as I was leaving Friday (trip 2) I went over to see the guy that they have stripping everything. I looked at what he was doing and he was busily gutting a drum memory!!! I looked around and found another that he had already torn one apart and I found there was one more to go. I wasn't intersted in it at the time but now I'm wondering if I should have gotten it. He said it weighed over 140 pounds! It looked like a 1/2 scale v-8 engine!
That's all for now, back to cleaning, sorting and packing!
Joe
Today I got the following:
commodore model 886D calculator.
Atlantic Data Products MicroDrive II for the Apple II series computer in the
box complete.
Japanese game cartridge for the Super Famicon, cartridge is by SAMMY and is
model SHVC-006 looks like baseball from the picture (can't read the
language).
Philips VELO 1 with 8MB ram and several cables plus two ac adapters with it.
Also got several different mousepads for the collection and some XBOX,
GameCube games.
Can anyone provide me with links to information on IBM printers
manufactured between 1981 and 1986? I'm especially interested in
pictures of the printers themselves.
Thanks,
Jeff