Ok, so I've come up with a plausible explanation for my TK50 problem.
Apparently the drive thinks there is a tape cartridge in it, even though
there isn't one. It runs the classic "loading sequence" (slow uptake then
fast uptake) even though there isn't a cartridge present. That suggests
that it is mistaken about the presence of a tape. So, does anyone know what
all of the methods are the TK50 uses to sense the presence of a tape?
I'd like to get this one fixed as it is an E4 (I've got two B2's, one E3,
and working E4 and one dead E4)
--Chuck
<KL11 setup: addr: 777560 , vector: 60.
That is a majik address. 176560(16bit address) and vector 60 is the
default console for any KL/DL or similar device. It is insensitive to
what the device generally is but the basic status and registers must be
there. RT-11, XXDP and friends expect it unless the particular copy
was built for an odd address, then console ODT (for those that have it)
will not be available and the console cannot control booting. Not a good
idea to do that by the way and you can only do it on the non-microODT
processors.
Also RT-11 (any version I have played with) MUST have 8kw of memory, again
you can custom build for smaller but for limited application only. The
smallest almost OS was the IOX package (IO Executive) for embedded apps,
the Micropower pascal system could build for small memories.
Allison
Next time I'm at the location where they're stored, I can try to find you a
number. They're RS-232, but they're a bit funky to get to work with
anything else; I don't remember the details, but it seems like they used
really odd settings - like 6 bits, mark parity, 2 stop bits. Also, the
attached phone only works with Northern Telecom phone systems, unless you
were to gut the whole thing and stick the electronics from a one piece phone
in them. What I've decided to do for terminals around the house (including
the kitchen and bathroom) is to buy some old 486 laptops with color displays
and PCMCIA slots. I've got PCMCIA ethernet cards for them, and am shopping
for PCMCIA sound cards. My plan is to run Linux or FreeBSD on them, and
X-windows, and let them surf the web as well as accessing our answering
machine (which runs on our file server, and is already web-enabled), Mister
House control console, and the CD jukebox control software. I'm going to
*try* to set up either a Real Audio server or some kind of multicast audio
server, and have a sound card in the server sampling and digitizing the
output of the CD jukebox and the computer-controlled FM radio tuner, so you
can "tune in" from any workstation in the place and listen to the radio or
CDs. (Hey - I've gotta have *something* to keep me out of trouble!)
>Someone moments ago made a reference to old Nortel (well, Northern
>Telecom, back then) display phones, but I didn't realize what they
>were referring to until I'd deleted the message :-/
>
>If those are the little black-paneled phones with CRTs and slide-out
>keyboard drawers, could you give me a model number? I've just realized
>that that'd make the perfect kitchen terminal, and might keep an eye
>out for them now, but it's awfully hard to search the 'net for
>'nortel display phones' without getting bunches of current stuff.
>
> -Rich
>
>--
>------------------------------ Rich Lafferty ---------------------------
> Sysadmin/Programmer, Instructional and Information Technology Services
> Concordia University, Montreal, QC (514) 848-7625
>------------------------- rich(a)alcor.concordia.ca ----------------------
>
>
Bill Richman
incolor.inetnebr.com/bill_r
(Home of the COSMAC Elf
microcomputer simulator!)
I recently acquired a Honeywell Level 6 Mainframe, printer, and numerous terminals. I was wondering if anyone had any software, documentation, or general knowledge of it. Any help would be greatly appreciated.
Thank You,
Owen Robertson
"I don't know anything about Honeywells but I just found two Honeywell
316s in a scrap yard here in Florida."
John B knows quite a bit about these. I have docs for the 516 series mostly.
Are the Pertec drives front or top loading? Any sign of a Pertec disc formatter
box? docs (i know.. ha ha..)
Ok, so now that I've got a mini TK50 test bed set up I tested three other
TK50s that I had in a box "condition unknown". After cleaning out some
killer dust bunnies they all seem to do the write things. For the archives,
TK50 behaviour is as follows:
Power on (empty) hums a bit, Red light on.
Red Light push button should be in the "out" position.
Internal tape spindle moves a bit.
Solenoid goes "click" and green light goes on (red off)
Lift handle, slide in tape, close handle.
Light stays green, nothing happens.
Press Red light/button into the "depressed" position.
Green light goes off, tape begins motion.
Whir, Whir, grind grind grind, tape stops
green light and red light remain lit.
Use tape in this mode, when finished...
Press Red light/button to the "out" position.
Tape moves a bit then rewinds rapidly.
Tape slows, light flickers, "click"
Solenoid retracts and green light goes on.
So my broken drive doesn't want to put the leader into the "load/unload"
position. Instead the tape stops before it gets completely unwound. I've
been using the same tape on all drives so that eliminates the tape as a
candidate for now.
--Chuck
>I have been able to boot XXDP on the PDP-11/20, no problems... but..
>(here is where I have a problem)
>I know the PDP-11/20 is booting RT-11v3.0B as it loads for about 20
>seconds.... problem is I don't get anything on the teletype. When booted,
>RT11 is waiting for keyboard input but does not read mine.
Taken with what you mentioned elsewhere in the message, I suspect that
XXDP does PIO while RT uses interrupt-driven IO, and without the other
interrupt working, it won't work. I have an idea of how it could be made
to, though... contact me off-line...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
>So several questions come to mind. I'll pop out some of the obvious ones...
>
>1) Does the Red Light/Button on the right hand side in the "out" position
>mean "unload" ?
Yes.
>2) When does the green light come on (except on power up when it is
>unloaded.) ?
Green light on (solid) means it's OK to operate the handle.
>3) It appears that a "working" unload sequence would have the tape leader
>get sucked back
> into the tape and the 'unhooker' should engage the hook leader. Why
>would it stop
> before it got that far?
While it's doing its tricks, look carefully at the metal capstan that
the tape and leader goes over at the rear of the drive. There's an
optical interrupter connected to the shaft of this, and this is the
only way that the TK50 knows that the tape is actually moving. If tape
or leader is moving over this capstan without turning the capstan, the
TK50 drive gets all confused and gives up. So look carefully to see
if that capstan is turning as tape gets pulled over it.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
Anybody know anything about a HP 4972A LAN Protocol Analyser?
Where I can find the OS software? manuals? etc? Is this
machine still worth anything?
Thanks.. (copyright date on the OS it boots is '90, so hey, it
fits the ten-year rule..)
Bill
--
+------------------------+----------------------+-----------------------+
| Bill Bradford | mrbill(a)pdp11.org | mrbill(a)mrbill.net |
| http://www.sunhelp.org | http://www.pdp11.org | http://www.mrbill.net |
+------------------------+----------------------+-----------------------+
-----Original Message-----
From: Al Kossow <aek(a)spies.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Saturday, February 12, 2000 2:22 AM
Subject: Re: RX01 Bootstrap Loader
>"I needed to boot RX01s as that is a lot easier to run diagnostics across a
>bunch of 11/20s quickly... beats paper tape!."
>
>Will DXDP run in 4k?
>
I have been able to boot XXDP on the PDP-11/20, no problems... but.. (here
is where I have a problem)
I know the PDP-11/20 is booting RT-11v3.0B as it loads for about 20
seconds.... problem is I don't get anything on the teletype. When booted,
RT11 is waiting for keyboard input but does not read mine.
When I use an M9312 (ver bad fit) I can type, when I boot XXDP it boots fine
as well and I can type.
I am using a KL11 (yuck) which uses one vector for both send/receive... at
least thats what I thought I read. I just gave Jerome Fine RT-11v3.0B
distribution to archive so I don't have the disks handy to find out if there
was a special driver to support the KL11 teletype interface. I *really*
don't want to hook up mag tape or RK05s eight now so... does someone know if
there is a special driver for the KL11?
BTW: RT11 V4 does not boot at all.. well, I hear the RX01 reading a bit...
then it dies.
KL11 setup: addr: 777560 , vector: 60.
john
PDP-8 and other rare mini computers
http://www.pdp8.com
