UNITRON COMPUTER, INC.

80486DX-33/50

Processor         80486DX
Processor Speed   33/50MHz
Chip Set          UMC
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              Phoenix
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J3       Power LED & keylock         J6

  Turbo switch                J4       Reset switch                W14

  Speaker                     J5       Turbo LED                   W15

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color                JP1           pins 2 & 3
                                                              closed

      Monitor type select monochrome           JP1           pins 1 & 2
                                                              closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

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

      4MB         (4) 1M x 9         NONE

      5MB         (4) 1M x 9     (4) 256K x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K x 9

      20MB        (4) 4M x 9      (4) 1M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8

     128KB      (4) 32K x 8       Bank 0      (1) 8K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8

                 CACHE JUMPER CONFIGURATION

   Size       W1        W2         W3        W4        W5

   64KB      Open      1 & 2     1 & 2     1 & 2     1 & 2

  128KB      1 & 2     2 & 3     2 & 3     1 & 2     1 & 2

  256KB      2 & 3     1 & 2     2 & 3     2 & 3     1 & 2

  Note: Pins designated should be in the closed position.

                    CACHE JUMPER CONFIGURATION (CON’T)

    Size           W6              W7             W8             W9

    64KB          Open            Open           Open           Open

    128KB       pins 1 & 2        Open        pins 2 & 3        Open
                 closed                         closed

    256KB       pins 1 & 2     pins 1 & 2     pins 2 & 3      pins 2 & 3
                 closed          closed         closed         closed

                          CPU TYPE CONFIGURATION

     Type           W10            W11            W12            W13

    80486SX      pins 2 & 3     pins 2 & 3     pins 2 & 3     pins 2 & 3
                   closed         closed        closed          closed

    80487SX      pins 2 & 3     pins 2 & 3     pins 1 & 2     pins 1 & 2
                   closed         closed        closed          closed

    80486DX      pins 1 & 2     pins 1 & 2     pins 1 & 2     pins 1 & 2
                   closed         closed        closed          closed