
UNIDENTIFIED

UM 386SX

Processor         80386SX
Processor Speed   16/20/24MHz
Chip Set          UMC
Max. Onboard DRAM 5MB
Cache             None
BIOS              AMI
Dimensions        221mm x 216mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Speaker                     J1       Turbo switch                J5

  Power LED & keylock         J2       External battery            J6

  Reset switch                J3       Auxiliary keyboard          JP2

  Turbo LED                   J4

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                JP3            Closed

      Monitor type select monochrome           JP3             Open

                            DRAM CONFIGURATION

  Size      Bank 0     Parity     Bank 1      Parity    Bank 2    Bank 3
                       (P-0)                  (P-1)

  512KB       (4)        (2)       NONE       NONE       NONE      NONE
            44256      41256

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

   1MB        (4)        (2)        (4)        (2)       NONE      NONE
            44256      41256      44256       41256

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

   2MB        (4)        (2)        (4)        (2)        (2)       (2)
            44256      41256      44256       41256     256K x     256K x
                                                          9          9

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

   3MB        (4)        (2)        (4)        (2)      (2) 1M     NONE
            44256      41256      44256       41256      x 9

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

   5MB        (4)        (2)        (4)        (2)      (2) 1M     (2) 1M
            44256      41256      44256       41256      x 9        x 9

                         DRAM JUMPER CONFIGURATION

  Size                                  JP1

  512KB      pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18,
                                19&20, 21&22, 23&24

  512KB      pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15, 14&16, 17&19,
                                18&20, 21&23, 22&24

   1MB       pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18,
                                19&20, 21&22, 23&24

   1MB       pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15, 14&16, 17&19,
                                18&20, 21&23, 22&24

   2MB       pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18,
                                19&20, 21&22, 23&24

   2MB       pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15, 14&16, 17&19,
                                18&20, 21&23, 22&24

   3MB       pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18,
                                19&20, 21&22, 23&24

   4MB       pins 1&3, 2&4, 5&7, 6&8, 9&11, 10&12, 13&15, 14&16, 17&19,
                                18&20, 21&23, 22&24

   5MB       pins 1&2, 3&4, 5&6, 7&8, 9&10, 11&12, 13&14, 15&16, 17&18,
                                19&20, 21&22, 23&24

  Note:Pins designated should be in the closed position.

     DRAM PARITY CONFIGURATION

  Setting       JP4        JP5

  Enabled     Closed      Closed

  Disabled     Open        Open

