ELITEGROUP COMPUTER SYSTEMS, INC.

486U (REV. 1.1C)

Processor              80486SX/80487SX/80486DX
Processor Speed        20/25/33/40/50MHz
Chip Set               UMC
Video Chip Set         None
Maximum Onboard Memory 64MB (32MB on external memory card)
Maximum Video Memory   None
Cache                  64/128/256KB
BIOS                   AMI
Dimensions             330mm x 220mm
I/O Options            External memory card
NPU Options            4167

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  Power LED &               J1         External battery          J7
  keylock

  Speaker                   J2         Turbo LED            W1 pins 2 & 3

  Turbo switch              J4         Reset switch              W14

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Turbo mode enabled                       J4           Pins 1 & 2
                                                              closed

      Turbo mode disabled                      J4              Open

  »   Factory configured - do not alter        J5           Pins 1 & 2
                                                              closed

  »   Factory configured - do not alter        W2              Open

  »   Factory configured - do not alter        W5           Pins 1 & 2
                                                              closed

  »   Factory configured - do not alter       W11              Open

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9      None           None           None

     2MB        (4) 256K x 9   (4) 256K x 9      None           None

     3MB        (4) 256K x 9   (4) 256K x 9   (4) 256K x 9      None

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

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

     5MB        (4) 256K x 9   (4) 1M x 9        None           None

     6MB        (4) 256K x 9   (4) 256K x 9   (4) 1M x 9        None

     8MB        (4) 1M x 9     (4) 1M x 9        None           None

     9MB        (4) 256K x 9   (4) 1M x 9     (4) 1M x 9        None

     10MB       (4) 256K x 9   (4) 256K x 9   (4) 1M x 9     (4) 1M x 9

     12MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9        None

     16MB       (4) 1M x 9     (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     16MB       (4) 4M x 9        None           None           None

     20MB       (4) 1M x 9     (4) 4M x 9        None           None

     24MB       (4) 1M x 9     (4) 1M x 9     (4) 4M x 9        None

     32MB       (4) 4M x 9     (4) 4M x 9        None           None

     36MB       (4) 1M x 9     (4) 4M x 9     (4) 4M x 9        None

     40MB       (4) 1M x 9     (4) 1M x 9     (4) 4M x 9     (4) 4M x 9

     48MB       (4) 4M x 9     (4) 4M x 9     (4) 4M x 9        None

     64MB       (4) 4M x 9     (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

  Note: Banks 2 & 3 are located on the external memory card.

            CACHE CONFIGURATION

     Size          Bank 0        Bank 1

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

     128KB       (4) 32K x 8      None

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

                 CACHE JUMPER CONFIGURATION

   Size       W6        W8         W9       W12       W13

   None      Open      Open       Open      Open      Open

   64KB      1 & 2     1 & 2     2 & 3     1 & 2     1 & 2

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

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

  Note: Pins designated should be in the closed position.

                         CACHE TAG CONFIGURATION

     Size            U2             U3            U4             U5

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

     128KB      (1) 16K x 4    (1) 16K x 4    (1) 16K x 4    (1) 16K x 4

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

  Note: U4 & U5 must be installed even if no cache is installed.

             CACHE TAG JUMPER CONFIGURATION

            Size                        W7

     No cache installed               Closed

    Chip installed at U3               Open

  Chip not installed at U3            Closed

                      CPU TYPE SELECTION

   Type        J3        W3         W4        W10       W15

  80486SX     Open      2 & 3      Open       Open      Open

  80487SX    2 & 3      1 & 2     Closed     Closed     Open

  80486DX    1 & 2      1 & 2     Closed      Open      Open

  Note: Pins designated should be in the closed position.