Number 161
November 11, 1986

The Memory Enable Jumper block, figure 3-9 page 3-13, was incorrectly
pictured in the NetWare Installation Supplement for 3Com EtherLink and
EtherLink Plus manual (all revisions), and should be replaced by the figure
below.

+-----------+
|    MEM    |
|   ENAB    |             +--------+
|  +-+-+-+ D|             | MEM    |
|E |#|.| | I|             |  EN    |
|N |#|.|#| S|             |      . |
|A | |.|#| A|             |      . |
|B +-+-+-+ B|             |      . |
+-----------+             +--------+

  34-0780                    1221

              Figure 3-9
       Memory Enable Jumper Block
       on 34-0780 and 1221 Boards


3Com Corporation has introduced a new version of the EtherLink Plus board
for use in file servers.  The new version is labelled EtherLink Plus 2012.
If you have this version refer to the following additions to locate the
components, select the transceiver type, and make the configuration settings
on your EtherLink Plus version 2012 boards.

If you have version 1194 boards, follow the instructions in the supplement
for EtherLink Plus boards.  (There are instructions for installing an
EtherLink Plus board in both the NetWare Installation Supplement for 3Com
EtherLink and EtherLink Plus and the NetWare Installation Supplement for
MICOM-Interlan.

Refer to the figure below to locate the components on your 2012 board:

                 Base I/o Address      DIX-BNC
                    Jumper Block     Shunt Block
                         |                 |
+------------------------+-----------------+---------------+ +--
|     +--------------+   |             +-+ |               | |
|     +--------------+   |             | | |  +-----+      | |##
|                    ## .+   +---+     | | +. #######      | |--+
|                    ##      +---+     +-+   +--------+    |-|  |
|           +----------+                     +--------+    | |  |
|           |          |                          +-+      | |  |
|           |          | +---------+              | |      |-|  |
|           +----------+ |    |    |              +-+      | |--+
|                        +---------+                       | |##
|          ############# .---.  ############               |#|
+---------+             +--+-+                       +-----+ |
          |             |  | |                       |       |
          +-------------+  | +-----------------------+       |
                           |
                           |
                     DMA/Interrupt
                  Line Jumper Blocks

The diagram below shows the transceiver type on EtherLink Plus 2012
boards:

     .......                  #######
     #######                  .......

 Settings for BNC         Settings for DIX

A shunt plug is mounted on the bottom two rows of pins for the default BNC
setting.  To select the board's DIX connector (for connecting the board to
an external transceiver installed on thick Ethernet cable), pry the shunt
plug up with an IC puller, a screwdriver, or some other appropriate tool.
Carefully remove the shunt plug and remount it on the top two rows of pins
to select the DIX connector.

Refer to the following figure to set the interrupt line, base I/O address,
and DMA channel settings for EtherLink Plus 2012 boards.

+------------------------------------------------------------------+
| Operating |             |            |                           |
|  System   |  Interrupt  |  Base I/O  |           DMA             |
|  Config.  |             |  Address   |                           |
|-----------+-------------+------------+---------------------------+-+
|           |             |   ... 4    |                           | |
|           |    ......   |   ... 5    |       ....  ........      | |
|           |    ......   |   ... 6    |       ....  ........      | |
|    0      |    976543   |   ... 7    |       3 1   0 5  6 7      | |
|           |             |   ... 8    |                           | |
|           |    IRQ 2    |   ... 9    |           DMA 5           | |
|           |             |  I/0 300h  |                           | |
|-----------+-------------+------------+---------------------------| |
|           |             |   ... 4    |                           | |
|           |    ......   |   ... 5    |       ....  ........      | |
|           |    ......   |   ... 6    |       ....  ........      | |
|    1      |    976543   |   ... 7    |        3 1   0 5 6 7      | |- AT
|           |             |   ... 8    |                           | | only
|           |    IRQ 3    |   ... 9    |            DMA 6          | |
|           |             |  I/O 310h  |                           | |
|-----------+-------------+------------+---------------------------| |
|           |             |   ... 4    |                           | |
|           |    ......   |   ... 5    |       ....  ........      | |
|           |    ......   |   ... 6    |       ....  ........      | |
|    2      |    976543   |   ... 7    |        3 1   0 5 6 7      | |
|           |             |   ... 8    |                           | |
|           |    IRQ 4    |   ... 9    |            DMA 7          | |
|           |             |  I/O 320h  |                           | |
|-----------+-------------+------------+-----------------------------|
|           |             |   ... 4    |                           | |
|           |    ......   |   ... 5    |       ....  ........      | |
|           |    ......   |   ... 6    |       ....  ........      | |
|    3      |    976543   |   ... 7    |        3 1   0 5 6 7      | |
|           |             |   ... 8    |                           | |
|           |    IRQ 3    |   ... 9    |            DMA 1          | |
|           |             |  I/O 300h  |                           | |
|-----------+-------------+------------+---------------------------| |- PC &
|           |             |   ... 4    |                           | | XT only
|           |    ......   |   ... 5    |       ....  ........      | |
|           |    ......   |   ... 6    |       ....  ........      | |
|    4      |    345679   |   ... 7    |        3 1   0 5 6 7      | |
|           |             |   ... 8    |                           | |
|           |    IRQ 3    |   ... 9    |            DMA 6          | |
|           |             |  I/O 310h  |                           | |
+--------------------------------------------------------------------+



161.doc

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