PDP-11/93

PDP-11/93 - the 20th anniversary PDP-11
the last PDP-11 made by digital (Digital Equipment Corporation)


My PDP-11/93

Thanks to Doc Shipley for trading parts and providing advice, and Johnny Bilquist for advice and guidance in configuring the BA23 system chassis.

Remaining components needed (mostly cosmetic):
  1. FOUND Front and rear pedestal BA23 covers (or bezels). 
  2. FOUND Knock-out plates to cover holes for rear of BA23.
  3. Copy of V2.0 of the KDJ11-EB monitor EPROM (to support dates after 2009).
  4. FOUND - RQZX1 documentation - To reach the RQZX1 configuration menu boot DU253 - see attachment at bottom of this page.



 Have  Need  Notes
 
 
Completed
 
 

Completed.
 
 
Completed.


 
  This QBUS SCSI card (CQD223A/TM) swapped for a DEC RQZX1 SCSI controller.

 
  A post to alt.sys.pdp11 suggested that this 2MB board can be upgraded to 4MB.

This is a 4MB (2KW) board, KDJ11-EB
     

TidBits about the PDP-11/93

Extracts applicable to the 11/93 from the The PDP-11 FAQ

PDP-11/93 boot-up (24 April 2010)

Ad-hoc notes and diary about configuring and starting my 11/93 for the first time
  1. Pulled the frame out of the pedestal unit so I can remove the cover panels for the powerup.
  2. To check the power-supply I needed a load, and so the TK70 tape drive seemed the best candidate. Mounted onto a sled and attached to the power-supply. I powered up the chassis and noted the forward fan worked but the power-supply fan was not spinning.  The front-panel indicated DCOK and the TK70 lit up one light. Powered down. Closer inspection revealed that the wire-screen had one wire bent inwards which fouled the blades. It snapped trying to bend it back so I removed it.
  3. Inspecting the SLU panel switch settings:
    1(off) - Enable SLU
    2(on), 3(on), 4(off) - select Boot device 1
    5(on) - forced dialog
    6(on),7(off),8(on) - 9600 baud, 8-data bits, no parity, one stop-bit console
  4. KDJ11-E switch settings:
    6(on), 7(on)

    Guide suggests these should all be set to off. Setting them all OFF now.
  5. Powered up again after fixing fan shield, both fans now working, everything looks ok. Powered down.
  6. Installed the KDJ11-EB into Slot 1 of the H9278-A backplane, connected the rear SLU panel to the CPU board and closed up the rear panel.


QBUS backplane configuration

A surprise I found with this system was the number of microprocessors employed in the implementation of various controllers.

Here is a list of uP found in this system:

  1. Zilog Z80 which controls the serial-lines on the KDJ11-EB CPU board.
  2. Intel 80186 16-bit CPU found on the MSCP SCSI interface (RQZX1).
  3. Motorola 68000 CPU on the TQK70 tape controller.
  4. Motorola 68000 CPU on the DELQNA Ethernet interface.

H9278-A A B C D
Q22/CD 1 M8191 : KDJ11-EB : 11/93 CPU includes 8 serial lines controlled by a Z80 (DLV22)
2 M5977 : RQZX1 MSCP SCSI
3 TQK70 Tape drive interface (empty)
Q22/Q22 4 DELQNA Ethernet  (empty)
5 (empty)
6
7
8 (empty) (empty)


PDP-11/93 performance comparison

Comprehensive listing of relative performance of PDP-11, VAX and Alpha machines from Pete Sivia. PDP-11/93 has a VUP "VAX 11/780 Unit of Power" of 1.0

    The following is a VUP and SPECfp92 table that I put together a while
    back using a number of different public sources.  As a bonus you get
    some PDP-11 ratings courtesy of a chart that showed up a few years ago
    in a DECdirect catalog :-)
    
    DSNlink also has an article called "CPU types and their related VUP
    Ratings" dated 15-Jul-94 for those who have access.
    
    (Note: the SPECfp92 ratings for Alphas have undergone change since the
    models were first introduced as various pieces of the operating system
    and microcode were "tweaked".  The numbers appear fairly stable.)

        AXP Model                  SPECfp92 Rating (under VMS)
        ---------                  ---------------------------
        DECpc 150 AXP                   113.0
        DEC   2000-200                  113.0
        DEC   2000-500                  113.0
        DEC   3000-300L                  64.9
        DEC   3000-300LX                 75.0 
        DEC   3000-300                   90.0
        DEC   3000-300X                 100.0
        DEC   3000-400                  116.9
        DEC   3000-400S                 116.9
        DEC   3000-600                  165.0
        DEC   3000-600S                 165.0
        DEC   3000-500                  132.0
        DEC   3000-500S                 132.0
        DEC   3000-500X                 168.2
        DEC   3000-800                  186.0
        DEC   3000-800S                 186.0
        DEC   4000-610                  143.1
        DEC   4000-620                    n/a
        DEC   4000-710                    n/a
        DEC   4000-720                    n/a
        DEC   7000-610                  182.0
        DEC   7000-620                    n/a
        DEC   7000-630                    n/a
        DEC   7000-640                    n/a
        DEC   7000-650                    n/a
        DEC   7000-660                    n/a
        DEC   7000-710                  188.0
        DEC   7000-720                    n/a
        DEC   7000-730                    n/a
        DEC   7000-740                    n/a
        DEC   7000-750                    n/a
        DEC   7000-760                    n/a
        DEC  10000-610                  200.5
        DEC  10000-620                    n/a
        DEC  10000-630                    n/a
        DEC  10000-640                    n/a
        DEC  10000-650                    n/a
        DEC  10000-660                    n/a
 

        MicroVAX Model             VUP Rating
        --------------             ----------
        MV I                              0.3
        MV II                             0.9                 MV -- MicroVax
        MV-2000                           0.9                  V -- VAX
        MV-3100                           2.4                 VS -- VAXstation
        MV-3100-M10                       2.4              VAXft -- VAX fault
        MV-3100-M10e                      3.5                       tolerant
        MV-3100-M20                       2.4                SRV -- VAXserver
        MV-3100-M20e                      3.5                VUP -- VAX Unit
        MV-3100-M30                       5.0                       of Power
        MV-3100-M40                       5.0                       (x V-780)
        MV-3100-M80                      10.0
        MV-3100-M90                      24.0
        MV-3300                           2.4
        MV-3400                           2.4
        MV-3500                           2.8
        MV-3600                           2.8
        MV-3800                           3.8
        MV-3900                           3.8


        VAXserver Model            VUP Rating
        ---------------            ----------
        PCLAN/SRV-3100                    2.4
        SRV-3100-M10                      2.4
        SRV-3100-M10e                     3.5
        SRV-3100-M20                      2.4
        SRV-3100-M20e                     3.5
        SRV-3100-M30                      5.0
        SRV-3100-M40                      5.0
        SRV-3100-M80                     10.0
        SRV-3100-M90                     24.0
        SRV-3300                          2.4
        SRV-3400                          2.4
        SRV-3500                          2.8
        SRV-3600                          2.8
        SRV-3800                          3.8
        SRV-3900                          3.8


        VAX Model                  VUP Rating
        ---------                  ----------
        V-  725                           0.3
        V-  730                           0.3
        V-  750                           0.6
        V-  751                           0.6
        V-  780                           1.0
        V-  782                           1.8
        V-  785                           1.5
        V- 4000-M 50                     20.0
        V- 4000-M100                     24.0
        V- 4000-M100A                    24.0
        V- 4000-M200                      5.0
        V- 4000-M300                      8.0
        V- 4000-M400                     16.0
        V- 4000-M500                     24.0
        V- 4000-M500A                    24.0
        V- 4000-M600                     32.0
        V- 4000-M600A                    32.0
        V- 4000-M700A                    40.0
        V- 6000-M210                      2.8
        V- 6000-M220                      5.0 (estimated)
        V- 6000-M230                      7.0 (estimated)
        V- 6000-M240                      9.0 (estimated)
        V- 6000-M310                      3.8
        V- 6000-M320                      7.0 (estimated)
        V- 6000-M330                     10.0 (estimated)
        V- 6000-M340                     13.0 (estimated)
        V- 6000-M350                     15.5 (estimated)
        V- 6000-M360                     18.0 (estimated)
        V- 6000-M410                      7.0
        V- 6000-M420                     13.0
        V- 6000-M430                     19.0
        V- 6000-M440                     25.0
        V- 6000-M450                     31.0
        V- 6000-M460                     36.0
        V- 6000-M510                     13.0
        V- 6000-M520                     25.0
        V- 6000-M530                     35.0 (estimated)
        V- 6000-M540                     42.0 (estimated)
        V- 6000-M550                     53.0 (estimated)
        V- 6000-M560                     58.0
        V- 6000-M610                     32.0
        V- 6000-M620                     58.0
        V- 6000-M630                     84.0
        V- 6000-M640                    106.0
        V- 6000-M650                    128.0
        V- 6000-M660                    150.0
        V- 7000-M610                     35.0
        V- 7000-M620                     65.0
        V- 7000-M630                     95.0
        V- 7000-M640                    125.0
        V- 7000-M650                    150.0 (estimated)
        V- 7000-M660                    185.0
        V- 8200                           1.0
        V- 8250                           1.5
        V- 8300                           1.8
        V- 8350                           2.0
        V- 8500                           3.0
        V- 8530                           4.0
        V- 8550                           6.0
        V- 8600                           4.2
        V- 8650                           6.0
        V- 8700                           6.0
        V- 8800                           6.0
        V- 8810                           6.0
        V- 8820                          12.0
        V- 8830                          18.0 (estimated)
        V- 8840                          22.0
        V- 9000-M210                     40.0
        V- 9000-M410                     40.0
        V- 9000-M440                    157.0
        V-10000-M610                     35.0
        V-10000-M620                     65.0
        V-10000-M630                     95.0
        V-10000-M640                    125.0


        VAX Fault Tolerant Model   VUP Rating
        ------------------------   ----------
        VAXft 110                         2.4
        VAXft 310                         3.8
        VAXft 410                         6.0
        VAXft 610                         6.0
        VAXft 620                        12.0
        VAXft 810                        30.0


        VAXstation Model           VUP Rating
        ----------------           ----------
        VS-I                              0.3
        VS-II                             0.9
        VS-II/GPX                         0.9
        VS-2000                           0.9
        VS-3100                           2.7
        VS-3100-M30                       2.7
        VS-3100-M38                       3.8
        VS-3100-M40                       2.8
        VS-3100-M48                       3.8
        VS-3100-M76                       7.6
        VS-3200                           2.7
        VS-3500                           2.7
        VS-3520                           5.0
        VS-3540                           9.3
        VS-4000-M60                      12.0
        VS-4000-M90                      32.0
        VS-4000/VLC                       6.0
        VS-8000                           0.9 (estimated)


        PDP-11 Model                VUP Rating
        ------------               -----------
        PDP-11/03                         0.05
        PDP-11/04                         0.11
        PDP-11/23                         0.12
        PDP-11/23+                        0.18
        PDP-11/24                         0.18
        PDP-11/34A                        0.21
        PDP-11/53                         0.29
        PDP-11/53+                        0.29
        PDP-11/44                         0.42
        PDP-11/73                         0.45
        PDP-11/70                         0.60
        PDP-11/84                         0.72
        PDP-11/83                         0.72
        PDP-11/94                         1.00
        PDP-11/93                         1.00

Ċ
Nigel Williams,
Aug 18, 2010, 8:20 PM
Ċ
Nigel Williams,
Aug 18, 2010, 8:32 PM
Ċ
RQZX1.pdf
(7968k)
Nigel Williams,
Aug 18, 2010, 8:15 PM
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