So I had a fellow list member show up and trade me an AUI cable for
reading some of his old RX01/02 disks to see if there was anything on
them. Not a big deal, TALOS (my 11/83) has pretty much everything:
11/83 CPU board with FPJ11
MSV11-QD card with 4mb memory (lots o' disk cache)
RXV21 plus RX02 drive
RLV12 plus two RL02 drives (and an RL01 in a pinch)
TQK70 and TK70 tape drive
DELQA Ethernet
DZQ11 4 port serial board
And the MTI ESDI disk controller with a 330mb half height ESDI disk
Overall it's a pretty fast and solid system. I have RT11 on DU4:, RSXM+
on DU0:, and plenty of power to do anything.
However when we fired it up we got nothing on the terminal. Great. So I
went to TITAN, which is another BA23 equipped 11/73 with:
11/73-B board wo FPJ11
2mb memory (Datamation)
TQK70+TK50 (my other TK70 doesn't write properly for some God unknown
reason)
DEQNA Ethernet (it works)
DHV11 8 port serial board
That odd little 3016 real time clock board I never seem to get around to
loading drivers for
RQDX3 jumpered for RD54 running RSX11M+ (not bad with cache)
20mb HH drive with XXDP+ utils
40mb HH drive with RT11 5.4 all drivers (last version that supports the
TU58)
That worked, we were able to move over the RXV21 and read the disks, but
I was wondering what was wrong with my main system. So after he left I
pulled it apart.
Problem seems to be the MTI card was not booting up properly, and since
it holds the Q bus in a frozen state until the disk spins to ready it
was blocking the system. Pulled it, cleaned the pins with 1500 grit
sandpaper, put it back in, it now works. Great.
So every once in awhile I guess I have to check the pins on these old
11's. They run well and are starting to be used more, but they still
have weird problems from time to time.
CZ
Anyone have the 2716 ePROM listing for IMSAI Basic. Version 1.4 or
whatever. I once had it, can't find my copy. If not 2716, I'll take any
listing that I can convert somehow.
Thanks
Bill
I am getting an error message when I boot up a recently donated PCs Limited
XT clone. The error is
ARC Turbo Board
X Turbo System Error # 04
Does anyone have one of these boards, I believe the error means the board
has been removed, and the system can't find it/bad board. If so, please
advise the $$.
I don't think the board is specific to PCs Limted, I found a general manual
called "Turbo-XT Main Board" that seems to be the OEM of the PCs
Limited-branded motherboard. I assume there is a separate daughterboard
the the "Turbo" part. Yes?
Thanks
Bill
So I had always heard the quote "640KB is enough memory" being attributed to
Bill Gates. However, recently I was watching Dave Plummer on YT and he said
that it is not true:
https://youtu.be/bikbJPI-7Kg?t=372
And apparently the man himself has denied it as well but it just will not go
away...
https://abcnews.go.com/Technology/PCWorld/story?id=5214635
So I guess like the napkin/disk story and the DR/IBM story this is another
one of those vintage myths and folk lore with no real basis in reality....
-Ali
As some of you may be aware I am trying to find a fault in a Rainbow H7842
PSU. I am using Tony Duell's schematic from here
http://www.bitsavers.org/pdf/dec/rainbow/duell_schematics/psu.pdf.
I have been testing the Control Module by using a bench PSU to supply 15VDC
to the input of the 7812 regulator (p2, PSU Sheet 1).
My diagnosis shows that the control module is shutting down the PWM (p6,
Control Module Sheet 2) because it is detecting an overcurrent in the -12V
side (E3d on Control Module sheet 1, although I have determined that it is
actually E3c).
This seems to be because I measure a steady 0.6V on pin 6 of the transformer
(p4, PSU Sheet 3). I just can't imagine where it might be coming from as the
chopper won't be running. I had previously removed the transformer and there
are no shorts between the pin 5-pin 6 winding and any of the other pins on
the transformer. I checked all the DC outputs of the PSU when powering the
7812 from the bench, both on a working PSU and the non-working one. They are
all at zero except the -12V output on the non-working PSU, which is +0.6V.
But the voltage can't come out of nowhere.
I am stumped and would appreciate any suggestions.
Thanks
Rob
This is on Discord.
I have an HP 2100A with a paper tape punch (a HP labelled Facit), tape
punch (HP), and an 7900A disc. The thing is in decent shape - full of
cards. The keyswitch is out of the thing, but I am pretty sure I still
have it.
Right now, I have me hands on the 2100A and Facit paper tape punch
(with bracket) - can I get $1000 for this combo? When I get my hands
on the reader and 7900A ( I think they are just buried!), we can deal
with them later, as I do not like to sell what my hands are not on.
Located around Kingston NY.
Oh, I have a 5 foot rack for this thing, still back at the old house.
--
Will
>> DSM-IV is "Diagnostic and Statistical Manual" for mental disorders,
>> and is
On Wed, 28 Jun 2023, Ali wrote:
> Fred,
> You are showing your age ;). The DSM-V has been out for a while now and the
> first revision (DSM V-TR TR=Text Revision, gotta love the Psych guys...) is
> coming out (is out?) soon
My age is getting quite difficult to hide.
The "new" (now 10? years old) edition (DSM-V) is not without controversy,
such as grief/depression; there are actually some who still prefer to use
the DSM-IV. When we put the DSM-V on the shelf in Reference, we had some
patrons asking us to bring back the DSM-IV.
But yes, my joke should probably have been worded DSM-V
Anyone in MD got an AUI cable (few feet long) I can steal so I don't
have to remove the bolts from the Pro/380's Ethernet socket or the pins
on my 10bt ethernet MAU?
Friendly note: If you try to boot a Pro/380 running POS 3.2 with Decnet
installed and don't have the loopback plug the system will crash hard
with a numeric error on the display. Noted.
CZ
Anyone in MD got an AUI cable (few feet long) I can steal so I don't
have to remove the bolts from the Pro/380's Ethernet socket or the pins
on my 10bt ethernet MAU?
Friendly note: If you try to boot a Pro/380 running POS 3.2 with Decnet
installed and don't have the loopback plug the system will crash hard
with a numeric error on the display. Noted.
CZ
Hey folks,
Now that I'm done moving house I have time to wrench on the 6150.
Before moving it worked; you'd power it on, the LCD status countdown
would get to an OK value, but the CRT wasn't legible. I figured I'd be
wrenching on the CRT.
Instead, now when I power it on, it powers on for a second or two and
then shuts off. I'm assuming this indicates a short or power-draw
somewhere. I've reseated the CPU and RAM cards, the peripherals, and
unplugged the hard drives (2x ESDI) and floppy in case they had a
fault that was drawing too many amps and causing the power supply to
shut-down. I noticed nothing on the CPU or RAM boards (exploded caps,
etc.)
What should I look at next?
--
-Jon
+44 7792 149029
