> From: Rod Smallwood
> You could if you were able to get into ODT. I have yet to discover how
> you get there.
What happens when you move the "Halt/Run/Restart" switch on the front console
to "Halt"? (Note that the "Off/Enable/Secure/Standby" switch must be in the
"Enable" position for the H/R/R switch to be active.) That should put the
CPU in ODT.
Noel
I have some rather rough set of MINC boards - A/D, D/A, digital, and
clock. These were outside for some time in California. Not super
rusty, but weather worn. I think you could clean them up.
Trade for? I could use some R, S, and B modules. Other interesting stuff?
--
Will
Anyone have a spare 2x20 (40 pin) DIP header they can stick in an envelope?
I'm checking eBay and all I see are 10-packs and/or silly shipping.
I believe this is the standard board-mount IDE connector? Either gold or
bright tin plating are fine.
Happy to reimburse you for the cost of the part & 1st Class stamp! ;-)
Hi
Further to my posts this morning I have one last hurdle to jump.
1. I have a VAX with a TK70 attached and a TQK70 controller.
2. The tape drive works just fine.
3. Also on the VAX I have the correct tape (.TAP) image file for a
RSTS/E V10 install tape.
4. I would like to copy the .tap file to the tape so as to end up with a
bootable install tape.
5. I then power down the VAX and move the controller to an 11/83. (The
drive is external with its own PSU)
6. Boot the install tape and go from there.
So suggestions please as to how to do 4.
Rod Smallwood
> From: Rod Smallwood
Ah, sorry about the previous message - hadn't gotten to this one yet! :-)
> 2. This is then followed by a request to type a letter B for boot , L
> for list and so on.
> 3. You can type any letter you like and it always goes to the same
> screen.
I wonder if there's a case issue - have you tried upper and lower?
> 7. The Unibus adapter appears to pass all of its tests.
> I have two and they both perform the same.
> 8. The next slot to the UBA is an RX211 .. It is set to the standard
> addresses. Again I have two and the result is the same in both cases.
Now that's _very_ interesting indeed. That cuts out a lot of the simple
explanations (broken RX211 or KTJ11 - unless both of one of them are busted).
One thing to check (sorry if you've already checked this) - did the address
switches somehow get inverted (i.e. 'off' where it should be 'on', etc)? I'm
too lazy to work my way through all the inversions in the address recognition
logic (the print set is available online, Google "MP00626") to see whether
'off' means '1' or '0'; I couldn't find a manual for the RX211, which would
say explicitly (the RK02 manual doesn't seem to cover configuration of the
RX211).
If that's not it, it may be time to break out the 'scope / logic analyzer.
Luckily we do have the RX211 prints. I can whip you up a short program to try
and read the CSR which you can 'toggle' in through ODT, if you've got a
'scope, not a LA. First thing to check would be to see if there are even
cycles getting to the UNIBUS.
> 9. The next three slots have bus grant cards
In the right connector, and in the right way around? (I know, I know, but
at this point, we're grasping at the proverbial...)
> 13. I have tried a couple of other controllers - same result.
As in, other kinds of boards on the UNIBUS? That's also interesting.
> 13. ... I'd like to get both monitor and boot proms back to standard.
I suppose it's _possible_ there's an error in the non-standard PROMs that
somehow buggers up the KTJ11.
According to the "PDP-11/94 System User and Maintainence Guide"
(EK-PDP94-MG-001, available online), pg. 5.49, the KTJ11 has some
maintainence registers which can be set to cause it to do strange things (I'm
just trying to absorb them all now).
One thing to note: 'Diagnostic Mode' is set at power-on, and when set, it
"the UNIBUS is disabled". So powering the machine on with it set to 'Halt'
(so the boot isn't run), and using ODT to poke UNIBUS registers won't work.
You'd have to let the startup run (which presumably leaves the UNIBUS turned
on - or maybe not, something worth checking) and then halt it to use ODT.
Anway, it would be interesting to see what the KTJ11's DCSR (at 17777730)
contains.
Noel
> From: Rod Smallwood
> On switch on the console display comes up. Whilst it performs the same
> functions as the one in the manual it looks different.
Hmm. Does it seem like a DEC EPROM, or someone else's? The 11/84 (very
similar CPU) has a 'list' command which lists all the various EPROM's; does
you console emulator provide that?
> What ever I do by way of setting up devices I can't get it to talk to
> the RX211.
Try stopping the console emulator and falling into ODT, and seeing if you can
see the RK211's registers from ODT. If not, does the 11/94 have that 'map'
command in the console emulator that the 11/84 does?
Another thing to try is, if you have some other UNIBUS device, plugging that
in, and seeing if the CPU can 'see' it.
Noel
> From: Rod Smallwood
>> The RX02 controller (RX211) should be at 17777170-6.
> OK Here's what I did
> ...
> Turn machine on drop into ODT key location in and press / get ?
> same for all of the others.
This is for attempting to read 17777170-6? (One needs the exact details,
always! ;-)
If so, either i) the RX211 card is set for some other address (check its
address switch at E74; switch 1 {pins 1-20] is the 010 bit in the address, on
up to 010000 at switch 10), ii) the RX211 card is defective, or the KTJ11 is
defective.
Since you don't have any known good devices plugged into the UNIBUS, it's
hard to select among these possibilities. Do you have any other UNIBUS
devices (other than the Tk controller) you can plug in?
Also, just for grins, you could try reading addresses 17777730-34, which are
registers on the KTJ11 itself, and see what you get.
Noel
> From: Rod Smallwood
> Needless to say all of the locations I examined came up filled with
> zeros.
Device registers will be in the range 17760000-17777776 (although toward the
top you'd mostly see CPU registers). The RX02 controller (RX211) should be at
17777170-6.
> Although the monitor display says Unibus system. I suspect what I have
> is a CPU used in a Qbus system with a hacked monitor and boot eprom.
Hmm. Well, the same physical board should work in either system (/93 or /94)
- and I suspect the ROMs check to see if there's a UNIBUS adapter (KTJ11)
there, and declaim the CPU board as a UNIBUS or QBUS, depending. (I.e. I
would wonder if there are separate QBUS and UNIBUS ROMs.)
That's because I have this bit set that there aren't separate /83 and /84
versions of the KDJ11-B for the two busses, and I would think that the /93
and /94 would likely be the same. (I should read the -B and -E manuals to
confirm that.) And I don't think there are separate part numbers for
KDJ11-E's for QBUS (/93) and UNIBUS (/94) systems.
But I'm not familiar with the ROM contents, so I can't say for sure. When
debugging broken hardware, I tend to ignore boot/diagnostic ROMs anyway, and
stick to simply what the hardware does (as seen via ODT), as that's a) much
less complex, and b) fully documented. (I don't know of any ROM listings, and
I'm not about to disassemble them!)
So if you can't see the RX211 registers from ODT, let me know, and we'll
figure out what to try to see if the KTJ11 is working properly.
> For whatever reason they managed to disable the unibus I/O
I'm not sure you can (in hardware terms, that is - and clearly if there's no
way to do it in the hardware, the software cannot do so)... although it could
be broken.
> I have what I believed is a working 11/83 in my computer room
> I'm going to try my processor in there
There's a section in the /94 maintainence manual (EK-PDP94-MG-001, available
online) about upgrading an -11/84 to an -11/94; you might want to read that
to see if there are any gothca's in terms of the cabling, etc. (The console
cabling will be an issue, of course, since the KDJ11-B and KDJ11-E use
different console connectors on the board - I'm talking about the other
cables.)
But AFAIK the KDJ11-E (/93 and /94) is a compatible upgrade to the KDJ11-B
(/83 and /84), so your plan should work.
Noel
