Thread View: vmsnet.pdp-11
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5 total messages
Started by Samuel Scott Patterson
Thu, 07 Jan 1993 07:14
Unibus Serial port problems
Author: Samuel Scott Patterson
Date: Thu, 07 Jan 1993 07:14
Date: Thu, 07 Jan 1993 07:14
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This didn't seem to get through the first time so here it is again..
Hello,
I need some help with my PDP-11/34a. I am trying to hook up the
M7856 card which the serial port/real time clock card. But I don't know
what the jumper settings on it should be. My system behaves fine until I
plug it into any Unibus slot (Yes, I plug it into the most foreward
position in the machine). After I put it in and turn my machine on,
the RUN lamp comes on and stays on. When I press HALT or LAD or
anything else, the BUS ERROR lamp comes on and the RUN lamp goes off.
If I remove the card and restart the system, the system works fine,
what's wrong!?
I know that the M7856 requires the bus grant jumper on the backplace,
as would an open space. So that shouldn't be the problem. Is it possible
that the real time clock is screwing it up? I vaguely remember that if
you only have more than one M7856 in the machine, only one clock should
be enabled. However, this is the only one in my machine. In fact, the
only things in my machine are the two processor boards, the RAM board,
the console board, the bus terminator, and bus grant cards. Is it
possible that the memory address on the M7856 is coliding with one of
those?
Lastly, I really need to know the DIP settings for the board.
I want to set it up as 9600B, No Parity, 8 Data, 1 Stop, and how to
set the address of the card. Should it be at a specific address or
merely an unused one?
Any help with be very greatly appreciated. Thanks in advance!
-Scott
11/34a problem (was serial port problem)
Author: Gadget
Date: Fri, 08 Jan 1993 03:42
Date: Fri, 08 Jan 1993 03:42
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sspatter@netcom.com (Samuel Scott Patterson) writes:
> I need some help with my PDP-11/34a. I am trying to hook up the
(etc. read the original!)
>the RUN lamp comes on and stays on. When I press HALT or LAD or
>anything else, the BUS ERROR lamp comes on and the RUN lamp goes off.
I am having exactlt the same problem with my 11/34a. The only thing is I
hadn't tried eliminating the 7859 (RL-11 V? (Sorry, I'm not currently
living with my machine)) to fix it. I have two of the
machines (One with the extended console) and both of them have this problem.
I also have the friend who is also having the same problem. It seems to me
that this must be a fairly basic mistake we are making with the machines.
Any hints?
Thanx
Matt Tovey | Commpower Engineering |
| Melbourne, | tovey@mullauna.cs.mu.OZ.AU
Voice: 61-3-419-4716 | Australia. | "Tomorrow's ideas on
Fax: 61-3-419-4716 | | yesterday's technology"
Re: Unibus Serial port problems
Author: J Lothian
Date: Fri, 08 Jan 1993 18:59
Date: Fri, 08 Jan 1993 18:59
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Here's some stuff about the M7856 (DL11-W) module (combined serial port/real-time clock), taken from the print-set. As far as I can remember, there are 5 sets of dip-switches on the board. Mode of operation is selected as follows: Mode 1: serial line and RTC can both be addressed. Serial line addresses are restricted to 77756X. [Standard console address]. Line clock is at 777546. Mode 2: Only serial line can be addressed. Address selection ranges from 774000 to 777777. Line clock is disabled. Mode 3: Only line clock can be addressed, serial line does not respond to any address. Line clock is at 777546. Mode selection & address bits: Address bit A10 A09 A08 A07 A06 A05 A04 A03 N/A N/A Switch S5-3 S5-2 S5-1 S5-4 S5-5 S5-6 S5-8 S5-7 S5-9 S5-10 Mode 1 Off Off Off On Off Off Off On Off On Mode 2 Off Off Off On Off Off Off On On Off Mode 3 Off Off Off On Off Off On On On On Mode 2 is shown for serial line addresses 77756X. For address bits in mode 2, switch off = 1 and switch on = 0. [Apparently, it is not possible to deviate from the specified address for the serial port in Mode 1 -- I have a feeling that if you fiddle with the address switches in Mode 1, the LTC address may move as well.] Note: remove R63 from DL11-W operating in Mode 2 to allow proper operation of a line frequency clock or other DL11-W in Mode 1 or Mode 3. [R63 goes from the BUS LTC L signal at pin CD1 on the backplane connector to (among other things) pin 9 on a 7414, and is a 330 ohm resistor. It should be easy enough to find -- I don't have a layout diagram for the board.] Vector Address Assignments Line clock is fixed at 100. Serial line assignments are floating vectors of the form XX0 (receiver) and XX4 (transmitter), where XX is 00 to 77. For console device, vector should be 060/064. Vector bit V8 V7 V6 V5 V4 V3 switch S2-8 S2-7 S2-5 S2-3 S2-6 S2-4 060/064 Off Off Off On On Off On=1, Off=0. Data Format Bits per Character S4-4 S4-3 Bits On On 5 On Off 6 Off On 7 Off Off 8 Parity S4-2 S4-6 Parity Off Off Off On Off Off Off On Even On On Odd Stop Bits S4-5 Stop bits On 1 Off 2 (or 1.5 if 5 data bits selected) Baud Rate Selection Rate Receiver Transmitter S3-2 S3-3 S3-5 S4-10 S3-1 S3-4 110 Off Off Off On On On 150 On Off Off Off On On 300 Off On On On Off Off 600 Off On Off On Off On 1200 Off Off On On On Off 2400 On On On Off Off Off 4800 On On Off Off Off On 9600 On Off On Off On Off Current Loop Active/Passive Selection Transmitter S1-1 S1-2 S1-3 S1-6 S1-7 Active On On Off Off On Passive Off Off On On Off Receiver S3-6 S3-7 S3-8 S3-9 S3-10 Active On Off On Off On Passive Off On Off On Off Reader Enable S1-4 S1-5 S1-8 S1-9 S1-10 Active On Off On Off On Passive Off On Off On Off [There is a spade lug on the board, near the front edge, which can be connected to one of the spade lugs on the M9301 bootstrap module, so that pressing BREAK on your terminal keyboard will cause the machine to bomb into the bootstrap module's console emulator.] So there you go. I've used one of these boards on my 11/40 for several years now, without much bother. I have an M9301 for bootstrap, and am good at avoiding BREAK when typing! The only thing that occurs to me about the problems you've been having is: is there another device (e.g. bootstrap board) in your system that includes an LTC circuit? See the note about R63 above. You can reset the 11/34 CPU by placing CONT/HALT in HALT position, then operating BOOT/INIT. Good luck. James -- ------------------------------------------------------- James Lothian | "It's life, Jim, james@uk.ac.ed.caad | but not as we know it"
Re: 11/34a problem (was serial port problem)
Author: Samuel Scott Patterson
Date: Sat, 09 Jan 1993 06:28
Date: Sat, 09 Jan 1993 06:28
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In article <9300814.8072@mulga.cs.mu.OZ.AU> tovey@mullauna.cs.mu.OZ.AU (Gadget) writes:
>I am having exactlt the same problem with my 11/34a. The only thing is I
>hadn't tried eliminating the 7859 (RL-11 V? (Sorry, I'm not currently
>living with my machine)) to fix it. I have two of the
>machines (One with the extended console) and both of them have this problem.
>I also have the friend who is also having the same problem. It seems to me
>that this must be a fairly basic mistake we are making with the machines.
>Any hints?
Hi! I got mine running! Okay, A few hints. :) Generally, if you get the
BUS ERR light like that, it has something to do with those little cards that
fit in the 3rd slot from the front of the machine. What happens is there are
some boards that are DMA and some boards that are none DMA. If you move your
boards around, you could end up with BUS errors. See, what they don't tell
you is that you have to have that little card in the empty slot but you also
have to have a jumper on the back side. If you look on the pin side of the
backplane, you will notice there are 4 columns of pins for each card slot
in the backplane. The columns are broken into blocks. Okay, in any non-
DMA slot, on the forth block at the end nearest the back of the computer,
the first pin in the column on the right side (from the front) should have
a wire connected to the first pin in the second column. Diagram Below:
Non DM Device V
. . . . . . . . . . . . . . . . . . . . . . . .
F . . . . . . . . . . . . . . . . . . . . . . . .
R . . . . . . . . . . . . . . . \ . . . . . . . .
O . . . . . . . . . . . . . . . \ . . . . . . . .
N . . . . . . . . . . . . . . . . . . . . . . . .
T . . . . . . . . . . . . . . . . . . . . . . . .
Processor Boards over here
Okay, of course there are more pins than this but you get the idea.
The \ represents where the jumper should be. DMA devices are things like
HD controllers and such.
The other possibility is that you have more than one M7856 card in it.
If that is the case, you need to either cut a jumper or flip some DIPs to
disable the real time clock on the second one. But I don't remember how to
do it offhand. However, I can give you the DIP settings on my board.
I have it configured for 9600B, no parity, 1 stop, 8 data and (I think)
real time clock enabled. (Many thanks to people who E-Mailed me)
S1:1101001101 S2:00000100 S3:1100110101 S4:0100101000 S5:0001001010
BTW, I have the M7859 console card installed and am using it.
-Scott
Re: 11/34a problem (was serial port problem)
Author: zrepachol
Date: Mon, 11 Jan 1993 17:26
Date: Mon, 11 Jan 1993 17:26
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In article <1993Jan9.062826.16525@netcom.com>, sspatter@netcom.com (Samuel Scott Patterson) writes: > In article <9300814.8072@mulga.cs.mu.OZ.AU> tovey@mullauna.cs.mu.OZ.AU (Gadget) writes: ... > The other possibility is that you have more than one M7856 card in it. > If that is the case, you need to either cut a jumper or flip some DIPs to > disable the real time clock on the second one. But I don't remember how to > do it offhand. However, I can give you the DIP settings on my board. > Only a BA-11L can drive mopre than one LTC load. So cut R63 on all DL-11Ws except the one you enable as 'clock'. The switch setting for a DL-11W are: Bus address S5 1=off, 0=on , order (msb) 3 2 1 4 5 6 8 7 (lsb) Vector S2 1=on, 0=off 8 7 5 3 6 4 Baud rates Xmit S4-10 S3-1 S3-4 110 on on on 150 off on on 300 on off off 600 on off on 1200 on on off 2400 off off off 4800 off off on 9600 off on off Rec S3-2 S3-3 S3-5 110 off off off 150 on off off 300 off on on 600 off on off 1200 off off on 2400 on on on 4800 on on off 9600 on off on Yeah, the inverse of Xmit... 20mA stuff... Xmit Active: s1-1, s1-2, s1-7 on; s1-3,s1-6 off xmit passive, invert above Rec active: s3-6, s3-8, s3-10 on; s3-7, s3-9 off Rec passive, invert Reader Run active: s1-4, s1-8, s1-10 on; s1-5, s1-9 off Data bits s4-4 s4-3 5 on on 6 on off 7 off on 8 off off Stop bits 1 s4-5 on 1.5/2 s4-5 off Parity, s4-6 on to enable, s4-2 on for even, off for odd Break bit S4-1 on to enable Error enable s4-7 on RTC S5-9 S5-10 On off on off on off only on on *** if RTC only is used. No SLU. Addr == 77754X!! Fun, fun board to sett up... ~Paul
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