ELITEGROUP COMPUTER SYSTEMS, INC.

UM 486/486SX

Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33/50MHz
Chip Set          UMC
Max. Onboard DRAM 32MB
Cache             32/64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J1       Reset switch                J4

  Turbo LED                   J2       Speaker                     J5

  Turbo switch                J3       Power LED & keylock         J6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color               JP1           pins 2 & 3
                                                              closed

      Monitor type select monochrome          JP1           pins 1 & 2
                                                              closed

  »   Power good signal detect from           JP2           pins 1 & 2
      power supply                                            closed

      Power good signal detect from           JP2           pins 2 & 3
      board                                                   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) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

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

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

                            CACHE CONFIGURATION

     Size         Bank 0       Bank 1      TAG/U34 - U37   Dirty Bit/U38

     32KB        (4) 8K x 8     NONE        (4) 16K x 4     (1) 16K x 1

     64KB        (4) 8K x 8   (4) 8K x 8    (4) 16K x 4     (1) 16K x 1

     128KB       (4) 32K x      NONE        (4) 16K x 4     (1) 16K x 1
                     8

     256KB       (4) 32K x    (4) 32K x     (4) 16K x 4     (1) 16K x 1
                     8            8

                        CACHE JUMPER CONFIGURATION

   Size        JP10         JP11         JP12        JP14         JP15

   32KB       pins 2 &      Open       pins 1 &     pins 1 &   pins 1 & 2
                 3                        2            2

   64KB       pins 1 &      Open       pins 1 &     pins 2 &   pins 1 & 2
                 2                        2            3

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

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

  Note:Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

     Type           JP5            JP6            JP8            JP16

   80486SX       pins 1 & 2     pins 2 & 3        Open           Open
                  closed          closed

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

   80486DX       pins 1 & 2     pins 1 & 2       Closed          Open
                  closed          closed