Have never looked into XXDP.
What I have right now: a LSI-11 system booting RT-11 (v5.04) with Kermit on the attached MSCP disk and an RX-01 controller (which works fine - I can boot the disk on the LSI system after building it).
On the 11/34 target system all I have is the RX-01 controller so I have to build the disk(s) on the LSI system, then move the cable to the 11/34 to try and boot it.
Can you point me to the run-down on building an XXDP disk?
Thanks
>> As expected, it went off for over a half-hour rebuilding RT-11.
>> Produced the expected files and I proceeded to make the disk
>> bootable. It boots on the LSI-11 system (an 11/73A) just fine. Put
>> that same RX-01 disk on my 11/34 via an M7846 controller and when I
>> tried to boot it I get the exact same result as before: it starts to
>> boot, steps four tracks or so, then halts at "005134" on the display.
>> If I inspect that address, it contains "140000".
...
>> Just asking for ideas on where to go next! Anything else I should be
>> checking?
> If I were you, my next step would be to run a full battery of tests,
>focusing on the CPU, via XXDP. Do you have the ability to make a
>bootable XXDP disk?
> -Dave
Professor Mark Csele, P.Eng.
Niagara College, Canada
300 Woodlawn Rd., L-23
Welland, ON, L3C 7L3
(905) 735-2211 x.7629
E-Mail: mcsele at niagarac.on.ca
URL: http://technology.niagarac.on.ca/people/mcsele
Author of "Fundamentals of Light Sources and Lasers", Wiley, 2004
> With the addition of two more Tektronix 4015-1 terminals, I've rearranged
> my Tektronix storage tube terminals in the warehouse and uploaded some
> updated pictures of "Tektronix storage tube row". (The 4015-1 is
> essentially a 4014 with APL and printer interface options.) Neither of
> the 4015's are reported to be in working condition from the seller, but
> at least all the keycaps with APL glyphs are present. The 4010 and 4014
> are relatively simple terminals, so I should be able to restore them to
> working order. They have no microprocessor, firmware code or custom
> ASICs, so repairing them should be a matter of replacing capacitors or
> replacing TTL or analog parts.
Richard, I finally got around to looking at your pics. What a great find!
I wonder if the MCAUTO label on your keyboard means McDonnell Douglas
Automation. I had a friend who worked there in the 1970s and they called
the DP (IT) shop McAuto. It was a huge place in Long Beach CA that handled
all the data processing for the aircraft company. Lots of interesting
stories. Congrats on your terminals!
I personally would love to have a 4051, does anybody remember those? Hi-res
green phosphor screens were made for graphics programming and came with
their own dialect of BASIC. They were one piece units on heavy stands and
had tape drives built into the console. Those were the days!
Now to find some old pallets, a few hundred bucks, a forklift, and a place
to store one.....
> Yeah, I've got one. Mine has no stand - unlike the 4010, the electronics
> for the 4051 are in the unit itself, not in the stand. It's really not a
> big device at all - very deep, but not so big that it won't fit on a
> desk. Of course, the 4051 I have (as with most, I would assume), has a
> faulty tape drive because the rubber driver wheel is shot. The built in
> BASIC is pretty cool, and the graphic routines are fun to play with, but
> without the ability to save programs, it's kind of annoying.
That's interesting. It's been about 30 years but I distinctly remember the
4051s I used sitting on really heavy duty stands, either bolted together or
I thought, made that way. I remember moving one across the room (with help),
it weighed a ton. Must have been the steel stand.
I hope you can sort the tape drive issues and get tapes as I remember the
units were very reliable and quite fast. I believe it had a feature to find
the file you wanted quickly and index the tape. Do you have the old golf
game? It was always a favorite.
--
Yes, I was there, if a little late...
The good old days really were!
At 02:33 AM 4/29/2011, Shoppa, Tim wrote:
>I have only made small efforts searching out new-manufacture hubs with BNC's but as far as I can tell, they simply aren't being made anymore. Everything new is a switch today. Keeping a few hubs for protocol sniffing etc. is still handy.
Although I still keep a little 5-port 10/100 true hub in my larger to-go bag
just in case, all business-class switches these days are "managed" and would allow
you to reprogram a particular port to mirror all traffic for sniffing purposes.
There are many managed 24-port switches in the sub-$200 range. Netgear makes
a managed 8-port 10/100/1000 switch that CDW sells for $105.
- John
What you want to do, is get a few "hubs" (90's era networking equipment) that have a mix of AUI, BNC, and 10BaseT connectors, and then cable the hub up to your more modern 100BaseT and faster switches.
A hub with 4 to 8 10BaseT + a BNC was a common configuration on consumer-grade stuff in the 90's, and it was on the more industrial rack-mount networking solutions too (and there you'll often get an AUI as well).
I have only made small efforts searching out new-manufacture hubs with BNC's but as far as I can tell, they simply aren't being made anymore. Everything new is a switch today. Keeping a few hubs for protocol sniffing etc. is still handy.
BlackBox etc. still sell new "Media Converters" with a 10Base2 on one end and a 10BaseT on the other end but the prices are heinous (e.g. $225: http://www.blackbox.com/Store/Detail.aspx/FlexPoint-10BASE-T-to-BNC-Media-C… ). I give them credit for still selling a networking technology that isn't the latest and greatest.
Tim.
T-minus TWO WEEKS until the VCF East 7.0 .... we're up to 23 exhibitors
which makes this the biggest east-coast edition ever. I've heard about
people planning to attend from Denmark and Australia .... so I don't
wanna hear that someone can't go because they live three states away and
it's too darn far. :-)
Show page is http://www.vintage.org/2011/east
Facebook page is http://www.facebook.com/vcfeast7
Be there or miss the awesomeness.
At 15:10 -0500 4/28/11, ard wrote:
>What is an 'informal qualification'?
Good question. http://dictionary.reference.com/browse/qualification
says:
qual?i?fi?ca?tion
...
-noun
1.
a quality, accomplishment, etc., that fits a
person for some function, office, or the like.
...
(other definitions deleted, likely including ones Tony was thinking of).
Rebuilding computers, tracing and
publishing schematics, etc. etc. seems to me to
fit you to comment and advise others doing same.
I own at least one functional computer that would
not be so without your advice.
I'll admit there's not a degree,
certification, legal requirement, etc. involved,
thus my suggestion that we apply the "informal"
specifier, but it looks to me like the
description fits.
--
- Mark 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:
Think of it as Evolution in Fast-Forward.
Dave,
It's a 9221, currently unracked... but damned if I can remember the exact
model. I will have to crawl back to the furthest reaches of the spare
bedroom/boxroom to find out one of these days. It was either the entry
level or one level up from the bottom. 120 or 130 I think.
Thanks,
Colin Eby
The DLV11-J has a ten-pin connector. To use with RS-232, simply use pin 2 as ground, pin 3 as TxD, and pin 8 as RxD. It is also necessary to jumper pin 7 to pin 9.
The reason for the jumper: the receive input of the DLV11 is differential: it could work with RS-422 as well as RS-232. RS-422 uses two wires for Tx and two for Rx and these are differential ... it is the polarity of the lines relative to each other that sets the bit (whether it is a one or a zero). These "twisted pair" signals are very immune to noise and are used industrially for long runs. I was always taught that anything over 20 feet should _not_ be RS-232 but a differential standard instead.
Anyway, grounding the "minus" differential receive input makes the "plus" differential receive input single-ended so that it is now referenced to ground: a voltage on that pin "positive" with respect to ground is a zero while a voltage which is "negative" is a one. This is the EIA standard used for RS-232 ... it is bipolar (i.e. the voltage can swing negative or positive with respect to ground).
So, for a small system where the terminal is close, RS-232 works fine and a simple cable will suffice. Where a system is large and terminals are placed a fair distance from the machine, RS-422 should be used.
Professor Mark Csele, P.Eng.
Niagara College, Canada
300 Woodlawn Rd., L-23
Welland, ON, L3C 7L3
(905) 735-2211 x.7629
E-Mail: mcsele at niagarac.on.ca
URL: http://technology.niagarac.on.ca/people/mcsele
Author of "Fundamentals of Light Sources and Lasers", Wiley, 2004
