Friday, August 21, 2015

DEC boards KDJ11-A (2) KDF11-A and Motorola MMS1132 128kW x 16 (can be 18) memory.

Four more boards from the gold scrapper.

MMS1132 Motorola Memory

Rear of MMS1132

The KF11 board below is marked with a Sharpie that it is BAD.  But it is the only one with the FP processor and MMU, so I'm hoping it works on the other KDF I have.

For the following two boards, both KDJ11-A boards, the date codes are near end of 1983 and all of the edge pins are present.  Note the one in the next illustration has the unused pins omitted.

I didn't find a clear revision in the etch indicating this change, in fact both have identical numbers for the most part.



M8028 Async with Modem

M8192 KDJ11-A
KDJ11-A (Bitsavers) PDP 11/73

M8186 PDP 11/23 KDF-11A

Includes E57, MMU chip.

A-614 PDP 8 DAC
setups for processor boards

KDF11-AX (M8186) CPU Module

This is a frequently encountered two slot CPU board. It supports an 18 bit address space through an MMU (Memory Manage Unit). It does not include the bootstrap and diagnostic capability nor SLUs as does the M8189, normally one or more additional boards (see below) provide this functionality. ODT is built into the microcode.
            \     /   M8186  REV A    \    /
        |             o-W19-o                  |
        |             o-W18-o                  |
        |                                      |
        |                                      |
        |   M  S  F  C    o-W17-o      o       |
        |   M  P  P  P               -W01-     |
        |   U  A  I  U                 o       |
               R  S       o             
               E        -W16-
                o-W07-o     o-W04-o
                o-W06-o                o-W2-o
                o-W05-o                  E2  <-   see note on W3

        |                                      |
        |                                E1    |
        |_                 _                  _|
          |_______________| |________________|
                   B               A

            \     /   M8186  REV C    \    /
        |                                      |
        |             o-W18-o                  |
        |                                      |
        |                                      |
        |   M  S  F  C            o-W1-o       |
        |   M  P  P  P                         |
        |   U  A  I  U                         |
               R  S

                o-W07-o     o-W04-o
                o-W05-o                  E2

        |   o-W16-o                            |
        |   o-W17-o                      E1    |
        |_                 _                  _|
          |_______________| |________________|
                   B               A

    Note one of my manuals has a fairly lengthy section on
    the Revision history.  Apparently there are slight differences
    in some of the jumper locations so if yours doesn't look
    exactly like those above, I hope its close.  The manual claims
    the revision number is stamped into the module handle,
    but mine has no such stamp.  ECO's included A0-A7 and
    C0-C3, although nothing below A3 was shipped.  There
    is also no revision B for some reason.

    These are typical wire wrap stakes, and a wire wrap could
    be used, but the factory installs a tin jumper.

    The one I'm holding in my hand now seems to be something
    between the boards shown above.  Apparently W18 is vertically
    oriented rather than horizontal as shown above, and there is
    no W02 or W03.  Maybe this makes it a revision A as the Service
    Manual says "On etch 'A' modules, W3 is installed by
    soldering a jumper wire from E2 pin 5 to E2 pin 15."
    However it does have W16 and W17 as indicated for a REV C,
    and a horizontal set of pins where W1 should be so it could
    be a REV C?

    Note Rev A above has an extra W19, and no W3.  W2,W16, and
    W17 are relocated, with W1 and W16 now being vertically oriented.
    Most of this doesn't matter a lot, cause you aren't supposed to 
    mess with these!

    In the tables below 'I' => jumper installed, 'R' => removed.
    All revisions list four jumpers as DEC reserved, and says
    jumper should be set at factory configuration.  W18 is
    revision specific.  
    Jumper    Name            Function       Factory Set
    W1        Master Clock    I = enable            I
    W2        Reserved        Factory Set           O
    W3        Reserved        Factory Set           I
    W4        Line event      O = enable            I
    W5        power-up mode   (see 1 below)         I
    W6        power-up mode   (see 1 below)         O
    W7        halt trap       O = enter ODT         I
    W8        bootstrap mode  I = 173000            I 
    W9-15     bootstrap adr   (see 2 below)         I
    W16-17    Reserved        Factory Set           I
    W18 (A)   Reserved        Factory Set           I
    W18 (C)   Wake up circuit O = enable            I

    1) Power up modes are defined by jumpers W5 and W6 
    mode                       W5    W6
     0    pc@24,ps@26          O     O
     1    console ODT          I     O 
     2    bootstrap            O     I 
     ie if you want it to use bootstrap ROM install W6
        if you want it to start up in ODT   install W5

    2) If W8 is out, W9 through W15 define the starting bootstrap
    address, if installed the standard 17300 (octal is used).
    W9-W15 correspond to address bits 9 through 15 respectively.
    In is a logical 1, out is a logical 0.

    The following diagnostic programs are mentioned:
    JKDBBO  CPU trap and EIS
    JKDABO  MMU  (requires KTF11-A option, ie MMU chip)
    JKDCAO  FPIS part 1
    JKDDAO  FPIS part 2

    Note the FPIS (Floating Point Instruction Set) was an
    option as was the MMU in some.  FPIS requires an MMU.

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