QDI COMPUTER, INC.

UL486 P3 PC

Processor        80486SX/80486DX/80486DX2/80486DX4
Processor Speed  25/33/40/50(internal)/50/66(internal)/100(internal)MHz
Chip Set         FOREX
Max. Onboard DRAM32MB
Cache            32/64/128/256KB
BIOS             AMI
Dimensions       254mm x 218mm
I/O Options      32-bit VESA local bus slots (2), green PC connector
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  External battery           J2       Speaker                      J8

  Reset switch               J4       Green PC connector          JP19

  Turbo LED                  J5       Green PC connector          JP20

  Turbo switch               J6       Green PC connector          JP21

  Power LED & keylock        J7       32-bit VESA local bus    SL1 - SL3
                                      slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Battery type select internal             J1             Closed

      Battery type select external             J1              Open

  »   Power good signal detect from           JP1           pins 1 & 2
      power supply                                            closed

      Power good signal detect from           JP1           pins 2 & 3
      board                                                   closed

  »   VESA card select normal                 JP3           pins 1 & 2
                                                              closed

      VESA card select Viper 9000 card        JP3           pins 2 & 3
      only                                                    closed

  »   Factory configured - do not             JP7              Open
      alter

  »   Factory configured - do not             JP8              Open
      alter

  »   DRAM bank select Bank 0 or Banks        JP27          pins 1 & 2
      1 & 2 used                                              closed

      DRAM bank select Banks 0, 1, & 2        JP27          pins 2 & 3
      used                                                    closed

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       1MB         (4) 256K x 9         NONE            NONE

       2MB             NONE        (1) 256K x 36    (1) 256K x 36

       2MB         (4) 256K x 9         NONE        (1) 256K x 36

       4MB             NONE        (1) 512K x 36    (1) 512K x 36

       4MB             NONE         (1) 1M x 36         NONE

       4MB          (4) 1M x 9          NONE            NONE

       6MB             NONE         (1) 1M x 36     (1) 512K x 36

       6MB          (4) 1M x 9          NONE        (1) 512K x 36

       8MB             NONE         (1) 1M x 36      (1) 1M x 36

       8MB          (4) 1M x 9          NONE         (1) 1M x 36

      12MB             NONE         (1) 2M x 36      (1) 1M x 36

      12MB          (4) 1M x 9          NONE         (1) 2M x 36

      16MB             NONE         (1) 2M x 36      (1) 2M x 36

      16MB          (4) 4M x 9          NONE            NONE

      24MB             NONE         (1) 4M x 36      (1) 2M x 36

      24MB          (4) 4M x 9          NONE         (1) 2M x 36

      32MB             NONE         (1) 4M x 36      (1) 4M x 36

      32MB          (4) 4M x 9          NONE         (1) 4M x 36

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

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

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

  Note: The actual location of the cache banks may vary.

                   CACHE JUMPER CONFIGURATION

   Size        JP9       JP10       JP11       JP12       JP13

   32KB       2 & 3      Open       Open       Open       Open

   64KB       1 & 2      Open       Open       Open      Closed

   128KB      2 & 3      2 & 3      Open      Closed     Closed

   256KB      1 & 2      1 & 2     Closed     Closed     Closed

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

        Type              JP14           JP15                U50

      80486SX             Open           2 & 3           3 & 6, 4 & 5

      80486DX            1 & 2       1 & 2, 3 & 4        3 & 6, 4 & 5

      80486DX2           1 & 2       1 & 2, 3 & 4        3 & 6, 4 & 5

      80486DX4           1 & 2       1 & 2, 3 & 4        uses voltage
                                                          converter

  Note: Pins designated should be in the closed position.

          CPU SPEED CONFIGURATION

   Speed      JP4        JP5        JP6

   25MHz     Closed      Open      Open

   33MHz     Closed     Closed    Closed

  50iMHz     Closed      Open      Open

   50MHz      Open       Open     Closed

  66iMHz     Closed     Closed    Closed

  100iMHz    Closed     Closed    Closed

      CPU CLOCK SPEED CONFIGURATION

        Speed                JP22

        1.5x          pins 2 & 3 closed

         2x           pins 1 & 2 closed

         3x                  Open

  BUS SPEED CONFIGURATION

  CPU speed        JP16

   <= 33MHz        Open

   > 33MHz        Closed