
IBM CORPORATION

ENHANCED MEMORY EXPANSION ADAPTER

Card Type                  Multi I/O card
Maximum Onboard Memory     15.5MB DRAM
I/O Options                Serial port, parallel port, 32-pin SIMM memory
                           slots (12)
Data Bus                   16-bit ISA

[Image]

                                CONNECTIONS

        Function           Location          Function           Location

  Serial port                CN1      Parallel port               CN2

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

      512KB       (2) 256KB x 9         None            None

       1MB        (2) 256KB x 9    (2) 256KB x 9        None

       1MB        (2) 512KB x 9         None            None

      1.5MB       (2) 256KB x 9    (2) 256KB x 9    (2) 256KB x 9

       2MB        (2) 256KB x 9    (2) 256KB x 9    (2) 256KB x 9

       2MB        (2) 512KB x 9    (2) 512KB x 9        None

       2MB         (2) 1MB x 9          None            None

      2.5MB       (2) 256KB x 9    (2) 512KB x 9    (2) 512KB x 9

       3MB        (2) 256KB x 9    (2) 256KB x 9    (2) 256KB x 9

       3MB        (2) 512KB x 9    (2) 512KB x 9    (2) 512KB x 9

      3.5MB       (2) 256KB x 9    (2) 512KB x 9    (2) 512KB x 9

       4MB        (2) 256KB x 9    (2) 256KB x 9    (2) 256KB x 9

       4MB         (2) 1MB x 9      (2) 1MB x 9         None

      4.5MB       (2) 256KB x 9    (2) 512KB x 9    (2) 512KB x 9

       6MB        (2) 256KB x 9    (2) 256KB x 9    (2) 512KB x 9

      6.5MB       (2) 256KB x 9    (2) 512KB x 9    (2) 512KB x 9

       7MB        (2) 512KB x 9    (2) 512KB x 9    2) 512KB x 9

      14MB         (2) 1MB x 9      (2) 1MB x 9      (2) 1MB x 9

                        DRAM CONFIGURATION (CONTD)

     Size          Bank 3         Bank 4         Bank 5         Bank 6

    512KB           None           None           None           None

     1MB            None           None           None           None

     1MB            None           None           None           None

    1.5MB           None           None           None           None

     2MB        (2) 256KBx9        None           None           None

     2MB            None           None           None           None

     2MB            None           None           None           None

    2.5MB           None           None           None           None

     3MB        (2) 256KB x 9    256KB x 9     256KB x 9         None

     3MB            None           None           None           None

    3.5MB       (2) 512KB x 9      None           None           None

     4MB        (2) 256KB x 9   (2) 256KB x    (2) 256KB x    (2) 512KB x
                                     9             9              9

     4MB            None           None           None           None

    4.5MB       (2) 512KB x 9   (2) 512KB x       None           None
                                     9

     6MB        (2) 512KB x 9   (2) 512KB x    (2) 512KB x    (2) 512KB x
                                     9             9              9

    6.5MB       (2) 512KB x 9   (2) 512KB x    (2) 512KB x    (2) 512KB x
                                     9             9              9

     7MB        (2) 512KB x 9   (2) 512KB x    (2) 512KB x    (2) 512KB x
                                     9             9              9

     14MB       (2) 1MB x 9     (2) 1MB x 9    (2) 1MB x 9   (2) 1MB x 9

  Note: If you are installing a mix of 256KB and 512KB SIMMs, then you
  must install the 256KB SIMMs first, starting at BANK 0.

  When you install 1MB SIMM modules on the board, you must only use 1MB
  SIMM modules throughout the board.

           EXPANSION MEMORY CONFIGURATION

  Size     SW 1     SW 2    SW 3     SW 4    SW 5

   1MB     Off      Off      Off      On      Off

  1.5MB    Off      Off      Off      On      On

   2MB     Off      Off      On       Off     Off

  2.5MB    Off      Off      On       Off     On

   3MB     Off      Off      On       On      Off

  3.5MB    Off      Off      On       On      On

   4MB     Off       On      Off      Off     Off

  4.5MB    Off       On      Off      Off     On

   5MB     Off       On      Off      On      Off

  5.5MB    Off       On      Off      On      On

   6MB     Off       On      On       Off     Off

  6.5MB    Off       On      On       Off     On

   7MB     Off       On      On       On      Off

  7.5MB    Off       On      On       On      On

   8MB      On      Off      Off      Off     Off

  8.5MB     On      Off      Off      Off     On

   9MB      On      Off      Off      On      Off

  9.5MB     On      Off      Off      On      On

                  EXPANSION MEMORY CONFIGURATION (CONTD)

     Size          SW1         SW2         SW3         SW4         SW5

     10MB           On         Off         On          Off         Off

    10.5MB          On         Off         On          Off         On

     11MB           On         Off         On          On          Off

    11.5MB          On         Off         On          On          On

     12MB           On         On          Off         Off         Off

    12.5MB          On         On          Off         Off         On

     13MB           On         On          Off         On          Off

    13.5MB          On         On          Off         On          On

     14MB           On         On          On          Off         Off

    14.5MB          On         On          On          Off         On

     15MB           On         On          On          On          Off

    15.5MB          On         On          On          On          On

  Note: If you are adding base memory, then switches 1-5 should specify a
  1MB starting address.

  If there is already expansion memory installed, the starting address of
  the adapter must follow the last address of the existing memory.

                         BASE MEMORY CONFIGURATION

              Function                    SW1/6               SW1/7

  Base memory address selection             On                 Off
  (256KB)

  Base memory address selection            Off                 On
  (512KB)

  Base memory address selection            Off                 Off
  (640KB)

  Note: If you have 640KB of base memory, the switch settings depend on
  the amount of expansion memory you have installed.

                      PARALLEL PORT ADDRESS SELECTION

                Setting                  Label           Position

              LPT1 (378h)                 JN2        Pins 1 & 2, 3 & 4
                                                          closed

              LPT2 (278h)                 JN2        Pins 5 & 6, 7 & 8
                                                          closed

  Note: 4-pin jumper module needs to be rotated 180 degrees to set either
  LPT1 or LPT2.

                      SERIAL PORT 1 ADDRESS SELECTION

               Setting                 Label            Position

             COM1 (3F8h)               JN1      Pins 1 & 2, 3 & 4 closed

             COM2 (2F8h)               JN1      Pins 5 & 6, 7 & 8 closed

  Note: 4-pin jumper module needs to be rotated 180 degrees to set either
  COM1 or COM2.

