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DEC units on ebay

AK6DN said:
Ref: https://www.christies.com/stories/g...f-technology-ef080682a70e4a97a53864b475333b12

I would have thought that Paul Allen would have had a plan for what would happen to his computer museum collection pieces after his death.
Like prearranging donations to specific other computer or technology museums.
Not just leaving it to the executor of his estate to auction everything off thru Christies to try and garner the highest cash proceeds.
Guess not.
Click to expand...
he naively believed his sister cared about his passions and would keep them alive after his passing, unfortunately jody allen is a demon assuming human form so she is going to sell everything off and give the money to charter schools instead

i wish her nothing but the worst
 
leegleason said:
And, I was just browsing Ebay for DEC related stuff, and came across the cable and connector box that works with that card. Have a look at https://www.ebay.com/itm/2262058255...1R3QTM&hash=item34aaeafa38:g:fJMAAOSwVk1mdZ5R
Click to expand...
*snort* Well I just made him a reasonable offer (way less than $150). However from the pictures I'll bet it's a DZV11 compatible bulkhead which means the card may be a DZV11 type device.

I've got plenty of those. And a real DZV11 breakout cable if I really want to make my Pro look like a monster :-)
 
Hunta said:
M7264-YB - 11/03 processor with 0-Kword RAM & DIBOL microm.
It looks like there is a very rare microm on the board that implements DIS (dibol instruction set) - the younger brother of CIS (commercial instruction set, for F11) for LSI-11
Click to expand...
https://gunkies.org/wiki/KEV11-C_Commercial_Instruction_Set states "The version of the KEV11-C option with two uROMs obviously takes two uROM sockets; it is therefore used with a 40-pin hybrid (two chips on one carrier) which holds the two uROMs of the base instruction set. The hybrid is 23-001B6, 23-002B6, or 23-003B6 (for M7264 ECO 10, ECO 12, and ECO 16, respectively)." It looks like the module in question has the third, 23-003B6, hybrid uROM.

Does anyone know where to find copies of these three M7264-specific ECOs (and perhaps all of the other M7264 ECOs)?
 
Regarding that board, it may have CUS, but to be honest one of my PDT11/150's has that double chip carrier. It just allows you to have one of the MICROMS plus EIS/.FIS on one chip carrier, allowing the PDT11 to have EIS/FIS.

So probably that.
 
czunit said:
Regarding that board, it may have CUS, but to be honest one of my PDT11/150's has that double chip carrier. It just allows you to have one of the MICROMS plus EIS/.FIS on one chip carrier, allowing the PDT11 to have EIS/FIS.

So probably that.
Click to expand...
Always a possibility, but the double-chip carrier is prominently marked 23-003B6, consistent with the gunkies description of the DIS/CIS hybrid.
 
pbirkel@gmail.com said:
I'm just going on what is stated in https://gunkies.org/wiki/KEV11-C_Commercial_Instruction_Set

"The KEV11-C Commercial Instruction Set is reportedly (documentation on it is impossible to find) an optional chip for LSI-11 chip set which adds support for a subset of the PDP-11 Commercial Instruction Set, sometimes known as DIS (DIBOL instruction set). It also apparently includes the PDP-11 Extended Instruction Set (but not the FIS)."
Click to expand...
Oh interesting, thanks!! Blimey that's a strange one, but neither EIS or full CIS.. Must be quite a small subset to fit in a 2 chip carrier, years before the 6 chip Full CIS on the 11/23...
 
I'll pop the lid off the PDT11/150 (Technically a MiniMINC) and take a picture of the chips. However if I recall correctly the WD chipset consisted of 4 chips including two 512 "words" (I forget what a microword size was on the WD chipset) to implement the basic pdp11 computer instruction set. The EIS/FIS was one additional 512 word chip.

So this 11/03 board seems to be a total of three 512 word chips which would not be enough to run DIS. In later years DEC released the two chips that made up the pdp11 on a single carrier, probably to save money but it did allow 4 socket WD boards to fit the EIS/FIS chip.

The real fun question is does a version of the microcode for the DIS exist in the wild. If it does, I could run it on my WCS-11 as the WCS-11 could run up to 1024 micro instructions.

The CIS chip for the KDF11 is a monster (I have two of them) and is basically six chips to implement the CIS in microcode. It does work fine with the FPP chip (which requires the MMU for the FP registers) or with the FPF11 board (I have run an 11/23+ with both and RT11 reports EIS, FPP, and CIS options installed). Hm. Never tried the CIS chip without the MMU chip.....
 
czunit said:
but it did allow 4 socket WD boards to fit the EIS/FIS chip.
Click to expand...
Most likely - without FIS, since there seems to be not enough address space for microcode.
Judging by the tests, DIS is
Code: 
ADDN    076050
SUBN    076051
CMPN    076052
CVTNL   076053
MOVC    076030
MOVRC   076031
CMPC    076044
LOCC    076040
SKPC    076041
SCANC   076042
SPANC   076043
Moreover, according to the operation codes, there is a complete coincidence with the CIS
 
Last edited:
Hunta said:
This weekend I’ll try to run DIS tests on KDF-11 with CIS
Click to expand...
Great info - can you post with disgs work/fail please! This looks like a useful (and easier than CIS) bunch of instructions to add to my emulator... would be interesting to see if RT-11 reports DIS...
 
Could not resist :)
VKAIB0
The first and second edits - bypassing the verification of codes that are incorrect for DIS (but correct for СIS)
The third edit is to bypass the check for interruptibility of DIS instructions (I haven’t figured out what’s wrong yet).
Code: 
BOOTING UP XXDP-XM EXTENDED MONITOR


XXDP-XM EXTENDED MONITOR - XXDP V2.5
REVISION: F0
BOOTED FROM DU4
124KW OF MEMORY
NON-UNIBUS SYSTEM

RESTART ADDRESS: 152000
TYPE "H" FOR HELP !

.L VKAIB0
VKAIB0.BIN

.
112330
@3556/004567 137
003560/010466 3656
@7622/004567 137
007624/004422 7722
@14520/001004 404
@200G
CVKAIB
END PASS
END PASS
END PASS
END PASS
END PASS
END PASS
END PASS
END PASS
END PASS
END PASS
END PASS
END PASS
END PASS
010552
@
The second test is a little later.
 
The second test performs worse. Traditionally, disable the interruptibility check.
Code: 
VKAJB0

BOOTED FROM DU4
124KW OF MEMORY
NON-UNIBUS SYSTEM

RESTART ADDRESS: 152000
TYPE "H" FOR HELP !

.L VKAJB0
VKAJB0.BIN

.
112330
@15126/001004 404
@200G
CVKAJB
001376    ; TEST 1 ADDN

001660    ; TEST 2 ADDN

002142    ; TEST 3 ADDN

002424    ; TEST 4 ADDN

005274    ; TEST 16 ADDN

013260    ; TEST 46 CVTNL

013304    ; TEST 46 CVTNL

013314    ; TEST 46 CVTNL

013610    ; TEST 50 CVTNL

013764    ; TEST 51 CVTNL

END PASS
 
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