> Sorry, folks. I've been asking around about what a System/74 is. I looked,
> and it's really a System/34. Could someone tell me what they were for, how
> much they were sold for, what year they are, what they're worth now, etc,etc.
> Thanks.
I used a System'34 when I worked for IBM in 1985-86. It was old then -
late '70s?. I seem to remember about 224K of RAM, possibly 256MB of
hard disk.
There were a number of posts on this subject on this list in late
September - start with the thread on IBM 5120 on 18th.
I would be very sad to see such a system vanish - I have a certain
affection for it after discovering that I - the newest student - knew
more about system/34s than anyone else in the building (this wasn't much
- the building housed two marketing units).
If you - or someone - do manage to acquire this sys/34, I may have some
spare copies of one or two pocket quick reference guides I could send
you. I'm pretty sure I've got OCL pocket reference (about 1/2 inch
thick) and I may have the Assembler pocket reference.
Finally, where is this machine? If it is in England or Wales I might
consider acquiring it myself...
Philip.
Thanks for the tips! I had found something that I suspected was
an optical sensor, but wasn't too sure. And cleaning it out as best
I could didn't change anything. Of course, I couldn't get at the
thing very well. And, as Tony pointed out, common-sense wiring of
the thing would mean the problem couldn't have been just a dirty
lens.
The good news is that I have a working drive to compare against,
so tracing the problem shouldn't be that hard. Maybe this weekend...
] Date: Mon, 10 Nov 1997 10:28:14 +0000 (GMT)
] From: Tony Duell <ard(a)odin.phy.bris.ac.uk>
] Subject: Re: Qume?
]
] On Mon, 10 Nov 1997, Bill Yakowenko wrote:
blah, blah, blah...
]
Lots of useful bits deleted...
]
] ... It shouldn't be too hard to trace the signal from the
] phototransistor to the Trk00 pin through the logic chips, though.
You'd think so. The last time I tried fixing these drives (a couple
years ago) I was trying to work backwards from the select LED. Had
big problems tracing the circuit because the traces go under chips,
and often turn corners under there, so you can't see which ones go
where. And I was paranoid about using a continuity-checker for fear
of putting voltage someplace where it could do damage. (Was that
being excessive?)
On the other hand, it should be trivial to measure voltage of the Trk00
signal at the connector, and see if it was getting that far. Divide
and conquer - the first secret of debugging.
]
] -tony
] Date: Mon, 10 Nov 1997 09:05:15 -0800 (PST)
] From: Tim Shoppa <shoppa(a)alph02.triumf.ca>
] Subject: Re: Qume?
]
] > ...got service manuals?...
]
] I wish I did. What model do you have? I'm looking for manuals
] for the Qume Datatrack 8 (DSDD, full-height.)
They are DT/8's, full height, I think DSDD (a megabyte per floppy).
] But lacking a manual, you still can trace the circuitry by hand;
] it's all SSI TTL, discrete components, and a couple of simple
] analog chips.
Yup. Sounds easy. If I wasn't so @#!% paranoid with the meter.
]
] Tim. (shoppa(a)triumf.ca)
] Date: Mon, 10 Nov 1997 17:33:51 +0000 (GMT)
] From: Tony Duell <ard(a)odin.phy.bris.ac.uk>
] Subject: Re: Qume?
]
...
] Still blowing dust out of the sensor can't do any harm, and it's something
] that I'd do first anyway, as it can't help the problem.
]
Will try it again, disassembling the thing if necessary to get access.
]
] -tony
Thanks guys!
Bill.
I'm open for it, anyone else ?
At 11:14 PM 11/11/97 -0500, you wrote:
>I'd like to snag one of those as well. Any chance of doing some sort of
coordinated roadtrip with folks meeting in a central place for distribution?
>
>-- Tony Eros
> Digital Equipment Corporation
>
>----------
>From: John R. Keys Jr.[SMTP:jrkeys@concentric.net]
>Sent: Tuesday, November 11, 1997 7:44 PM
>To: Discussion re-collecting of classic computers
>Subject: Re: FWD: FREE to good home: IBM RT 6150s
>
>If no one close want them I could drive from Minnesota to your home a
>meeting place close to the IL border one of these weekends before snow hits.
>John
>At 09:16 PM 11/10/97 -0500, you wrote:
>>Found the following on comp.sys.ibm.pc.rt
>>Anybody near him wanna rescue these machines.
>>
>>I acquired one about a month ago here in Indiana, along
>>with a fairly complete set of books and disks. Mine has
>>two ESDI drives (300mb & 110mb) and loaded with
>>AIX 2.2. It's a tower case about 24" x 24" x 9".
>>If I remember the front panel says System 135.
>>
>>Mike Thompson
>>
>>==================================================
>>Subject: FREE to good home: IBM RT 6150s
>>From: Bill Bradford <mrbill(a)texas.net>
>>Date: Sun, Nov 9, 1997 20:52 EST
>>Message-id: <645pd8$cbc$1(a)news3.texas.net>
>>
>>I recently acquired this whole bunch, with the intention of getting
>>at least a couple of them reloaded and working; however, I've now
>>got plans to move soon, and cant afford to move these machines. I'd
>>like to see them go to a good home; so they're free to the first
>>person to come pick them up.
>>
>>System Configurations: (6 systems)
>> EAP processors (16mb RAM each)
>> dual ESDI hard drives (unknown size)
>> SIIG ISA-bus I/O cards
>> Graphic cards with 6153 mono monitors
>> Ethernet (AUI / 10base2) cards
>> ESDI controller cards
>>
>>The other system only has the HDs and ESDI controller card (no CPU card
>> or other cards). Also, one of the above systems is lacking the 1.2mb
>>floppy drive; it may be the same system that is lacking a CPU card.
>>
>>I beleive 3 or 4 of the machines also have tape drive controller
>>cards; and I have three external IBM QIC tape drives to go with them.
>>I've also got a 15" monochrome IBM monitor that has a DB9 data cable
>>connector.
>>
>>I've got some manuals (User's manual, problem determination guide, and
>>2-3 others) in the IBM binders.
>>
>>Systems are located in Austin, Texas. You'll need a good-sized pickup
>>truck or van to haul all of them away. If you're interested, let me know.
>>It sucks to let these go, but I cant afford to move them along with my
>>other computer equipment.
>>
>>I can be reached at mrbill(a)texas.net.
>>
>>--
>>Bill Bradford Sr. Systems Engineer ICQ: 1864511
>>mrbill(a)texas.net Texas Networking, Inc. http://www.texas.net
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
Anybody know what it is? There's one up for grabs in OK, by US govt.
auction. Here's a URL; dork around with it to find related info:
http://www.drms.dla.mil/drmo/sales/misc/SY3AFB20377002A157-1.html
Looks pretty cool, but it's a thousand or two miles from here...
Bill.
Another lot up for bid. After this one, I'll stop. Honest.
Taken from http://www.drms.dla.mil/national/catalogs/318306CH.html .
As before, muck with the URL to find related info.
Cheers,
Bill.
| **********************************************************
| ITEMS 8 THRU 9 ARE LOCATED AT
| NWC CHINA LAKE NAVAL WEAPONS CENTER CODE 7, BLDG 1073
| CHINA LAKE, CA 93555-6001
| **********************************************************
| 9. AUTOMATIC DATA PROCESSING EQUIPMENT:
| Including: Apple Laser Writer printer, Digital
| Monitors, Printers, Terminals, Multiplexers, Computers,
| Keyboards and Power Controls, IBM Disk Drives and
| Terminals, etc.
| DEMIL CODE B
|
| CONTACT: SAMUEL J. BROWN PHONE: (760) 939-2502
| Inside - COB010208A,B,CN.
| Loose on pallets.
| Used - FAIR
| Total Cost - $150941.94
| Est Total Wt - 866 lbs.
| 1 LOT
|
| THE FOLLOWING ARTICLES APPLY:
| PART 05-I: Military Munitions List Items (MLI).
| PART 05-K: Munitions List and Strategic List Items
| (MLI/SLI) Compliance.
|
| END USE CERTIFICATE APPLIES AND MUST BE COMPLETED AND
| SUBMITTED WITH BIDS FOR THIS ITEM.
Hi Allison:
> <> Your best bet is the 1N914 silicon diode. The one your replacing is likel
> <> not germainium. 1n914s are available from many sources (even radio crap
> <> for a few cents a peice.
>
> Trust me they are not caps, the part someone described would come into
> common use about 5-8 years later! To tell if they are diodes an
> ohmeter(VOM) and check for resistance one way and open circuit the other.
> No resistance in either direction is a cap!
I spoke with a fellow who has a print set for the board, he indicated that
there are no diodes on the board at all. There are, however, quite a few
bypass caps shown on the schematic. My glass devices are all in parallel,
each associated to a particular, IC, and are grounded on the other lead.
I will have to remove an intact one to check resistance and determine what
they are.
Thanks for the reply,
Kevin
--
Kevin McQuiggin VE7ZD
mcquiggi(a)sfu.ca
At 05:45 PM 11/10/97 +0000, you wrote:
>> (i.e., not looked for) the software to do it. Can someone recommend a PC
>> program to read 5.25" (and 3.5"?) diskettes and make images of them?
>There is... look into the simtel site and d/l several of them to try
>out. Some are DOS, win3.x and win95.
>I prefer to archive all of my disks to that dos based imager.
I like DOS best too. I'll check it out. Thanks!
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
sinasohn(a)ricochet.net that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.crl.com/~sinasohn/
Sorry, folks. I've been asking around about what a System/74 is. I looked,
and it's really a System/34. Could someone tell me what they were for, how
much they were sold for, what year they are, what they're worth now, etc,etc.
Thanks.
By the way, I may be able to get my hands on those unidentified IBM network
cards, maybe I can get a couple or two. I'll also look if I can find a hub
for them. There are also some PS/2s (not for sale), which used to be attached
to the network, which is now ethernet. The PS/2s, however, have a weird cable
that looks like the monitor power cable. It has a box on the end, about 1" X
1", that has a ton of electrodes. What is that?
OK, so they weren't called that early on. But still, that's what
they're called now. What I really want is something small, but
powerful. (This classic is going to get USED) I have two schedule
programs; MS Schedule+ and a program called Sidekick 2.0, for DOS, made
in the early 90's. Compatibility would help. I also want something
that's not to hard to find, and I can get for less than a Palm Pilot. (A
lot less, if possible.)
Thanks for all of your assistance,
Tim D. Hotze
At 08:47 PM 11/10/97 -0500, you wrote:
>Now the $64 question. there was a tandy with a 80x4 or 80x8 I do remember
>it as it was one of the few with a decent line length.
Could that have been the WP-2? (m100-like word processor). I sure hope so,
'cause I could really use the $64... 8^)
(Not including later PC laptops of course)
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
sinasohn(a)ricochet.net that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.crl.com/~sinasohn/
