27 Nov
2016
27 Nov
'16
6:55 p.m.
On 11/27/16 4:28 PM, william degnan wrote:
So you've verified that the vectors on both your SLUs are correctly set?
I followed the settings found here:
http://www.pdp-11.nl/peripherls/comm/interface/dl11-w/dl11w-info.html
I have a CPU backplane populated as follows, I have checked the jumpers on
the CPU cards to verify that they're correct to the options installed
1: empty
2: M7253
3: M7232 (1-4) M7237(5)
4: M7231
5: M7233
6: M7235
7: M7234
8: M7236
9: empty with GC
CORE PLANES (2 slots 11-29 has only the first 16K populated.)
9/11: M981 (1-2)
11: M8293 (3-6) (start core plane)
12: M7259 (1-2)
13: G114
14: H217C
15: G235
16-18 empty (removed all core cards)
19/21: M9202 (1-2)
22-29 empty (removed all core cards)
29/31: M9202
DD11B:
31: 7800
32: gc
33: gc
34: 7856
34: M9202
DD11-C:
35: gc
36: NPR (jumper was removed at some point)
37: GC
38: 9312 / NPR
Thanks. Where is the M7762 in this lineup? You might try shortening
the bus to eliminate extra variables (the second MM11 backplane, and the
2nd DD11 backplane can be removed) but you're probably fine. Based on
the above, it looks like you've gone over all the grants and have the
proper continuity cards and/or NPR jumpers in place. I would also
suggest cleaning the edge connectors on any that look dirty or oxidized,
it can and does make a difference (in my experience).
I have done this, some success, but some inconclusive or hard to interpret
(for me). I thought I'd have better luck if I installed the entire XXDP
at my skill level anyway. I am learning a lot but I did not work with this
equipment before. If you really want to make a bootable XXDP TU58 tape image, the
instructions given by AK6DN here:
http://www.vcfed.org/forum/showthread.php?42246-How-to-make-a-bootable-XXDP…
have worked for me in the past. You can use PUTR to throw more
diagnostics on the tape if you need.
But you'll need to be able to actually do a TU58 boot, which it sounds
like you've been having trouble with, so your mileage may vary.
Running the diagnostics stand-alone using PDP11GUI should work fine, and
I've had good luck with it. Just be sure to read the diagnostic
instructions carefully so you know the starting addresses and the proper
switch settings. (Sometimes the instructions are in the listing,
sometimes there's a separate document).
According to the user's guide:
http://bitsavers.trailing-edge.com/pdf/dec/disc/rl01_rl02/EK-RL012-UG-004_R…
If the CSR bits are as you report, the drive got the Read command
(that's what F0-F2 indicate -- the last selected function, in this case
"Read Data"). Bit 15 indicates a composite error, and bit 10 indicates
OPI, as you note. I don't see anything in there about HFT unless you
left out some bits.
If indeed bit 12 is set (indicating HFT) then the "Header Not Found"
indicates that the drive was unable to find the header for the sector on
the disk, which makes it look like the drive is trying to read but for
whatever reason isn't able to find the sector. This could be a damaged
disk, misaligned heads, or any number of logic failures.
I would start with the RL02/RL11 diagnostics via either XXDP or PDP11GUI
and go from there.
Follow up
-
I don't think I have issues with my M9312, thanks for your help. There
are a number of candidate issues with my 11/40 which are causing my system
to not be able to initiate a bootstrap of the TU58 ROM using the M9312, or
bootstrap manually by using the front panel.
There is at least partial communication between the TU58 emulator (running
on Comm port 3) of my PC, the M7856's jumpers *I think* are correct to
serve as the serial card on the PDP 11/40 end.
I have the LTC turned off.
(S59 off / S510 on)
There is
always more testing I can do, but I suspect my issues are not
with
the serial card. Taken holistically, I think there is a DMA UNIBUS issue
somewhere. Just a hunch.
Can you elaborate on why you suspect this is the case? Can you describe
your system in detail?
If anyone knows of or would be willing to make an XXDP
TAP image
compatible
with a 16K PDP 11 I can convert to download via PDPGUI.
PDP11GUI doesn't use TAP files. You can use PDP11GUI to load individual
XXDP diagnostics into the PDP-11 without needing to boot XXDP at all. J?rg
has provided a wonderful database of diagnostics here:
http://www.retrocmp.com/tools/pdp-11-diagnostic-database. Find the device
you need to test and grab the diagnostic binaries, listings, and
documentation and go to town. (See section 5 of
http://www.retrocmp.com/how-tos/using-pdp-11-diagnostics/227
-pdp-11-diagnostics-running-them to see how that's done.)
Given I also have
Yes the controller, cable, and disk were tested and working in another
system, recently. I have more than one working cable and controller. I
did not personally test the RL02s I have, but one was used a lot by the
previous owner, I have a 2nd that was also used by previous owner before I
took possession of them.
I use both the M9312 DL ROM and manually entering in the bootstrap without
the M9312 installed (replace with terminator card). With the ROM method
the system repeats an attempt over and over.
system is looping between instructions 173022 -->173156 (error reset the
world), 173160 (retry)..back to 173022
When I first power on the values in the control status register (774400)
are good. 1-6 and 8-13 are cleared, bit 7 is set.
After I attempt to boot (DL at the @ prompt), you can see the light pattern
repeat over and over, looping through 173022 -->173160.
I HALT the system and recheck the control status register. This time
15 - error (composite error (ERR))
10 - EO (operation incomplete (OPI))
7 - stays lit
function code F2 = 1, F1 =1, F0 =0. this code indicates "HFT" (Header Not
Found)
To me (and this is just me) the bootstrap is not waking up the RL11
controller, and can go no further. issues initiating RL11 bootstrap (with known
working equipment),
What issues are you having? Does it hang? Halt? How are you
bootstrapping? I assume you know the RL11 and the RL02 and the pack
involved are all known-working?
I am not an expert, just doing the best I can, hope this helps explain.
Nor am I,
but I'm getting better. The DEC documentation is generally
excellent, and it helps to have a basic understanding of the instruction
set. You might try sitting down with the RL02 user's manual and writing
some short programs to test out the controller just to see what it's
doing -- see if you can read in a single sector, etc...
- Josh
Bill