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