TANDY/RADIO SHACK

MEMORY EXPANSION ADAPTER (250-4027)

Card Type              Memory
Maximum Onboard Memory 8MB DRAM
Data Bus               Tandy 3000NL memory expansion bus

[Image]

                        USER CONFIGURABLE SETTINGS

                  Setting                       Label        Position

  »   Computer has one memory expansion          E1          Pins 2 & 3
      slot                                                    closed

      Computer has two memory expansion          E1          Pins 1 & 2
      slots                                                   closed

            Note:E1 may not be present on all versions of this card.

                            DRAM CONFIGURATION

    Setting         Bank 0         Bank 1        Bank 2         Bank 3

     512KB         (2) 256K x       None          None           None
                       9

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

     1.5MB         (2) 256K x    (2) 256K x     (2) 256K x       None
                       9             9              9

      2MB          (2) 256K x    (2) 256K x     (2) 256K x   (2) 256K x 9
                       9             9              9

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

     2.5MB         (2) 256K x    (2) 1M x 9       None           None
                       9

      3MB          (2) 256K x    (2) 256K x    (2) 1M x 9        None
                       9             9

     3.5MB         (2) 256K x    (2) 256K x     (2) 256K x    (2) 1M x 9
                       9             9              9

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

     4.5MB         (2) 256K x    (2) 1M x 9    (2) 1M x 9        None
                       9

      5MB          (2) 256K x    (2) 256K x    (2) 1M x 9     (2) 1M x 9
                       9             9

      6MB         (2) 1M x 9     (2) 1M x 9    (2) 1M x 9        None

     6.5MB         (2) 256K x    (2) 1M x 9    (2) 1M x 9     (2) 1M x 9
                       9

      8MB         (2) 1M x 9     (2) 1M x 9    (2) 1M x 9     (2) 1M x 9

            Note:The memory installed on the mainboard must be removed in
            order to use this card.

            Within each bank, the SIMMs must be the same size. Banks may
            contain either 256K or 1M SIMMs.