
QDI COMPUTER, INC.

VL/ISA-PB486P3

Processor  80486SX/SL80486SX/CX486M7/80486DX/SL80486DX/80486DX2/80486DX4/P24D/Pentium
           Overdrive
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   OPTI
Max.       64MB
Onboard
DRAM
Cache      64/128/256KB
BIOS       AMI
Dimensions 254mm x 220mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  Turbo switch               J1       Green PC connector          JP21

  Power LED & keylock        J2       Green PC connector          JP32

  Turbo LED                  J3       Reset switch                 S1

  Speaker                   JP18      32-bit VESA local bus    SL1 - SL3
                                      slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Battery type select internal            JP26          pins 2 & 3
                                                              closed

      CMOS memory clear                       JP26          pins 1 & 2
                                                              closed

     Monitor type select color               JP30            Closed

      Monitor type select monochrome          JP30             Open

     Factory configured - do not             JP44          pins 2 & 3
      alter                                                   closed

     Factory configured - do not             JP46          pins 2 & 3
      alter                                                   closed

  Note: The locations of JP44 & JP46 are unknown.

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       1MB         (4) 256K x 9         NONE            NONE

       2MB             NONE        (1) 512K x 36        NONE

       4MB          (4) 1M x 9          NONE            NONE

       4MB             NONE         (1) 1M x 36         NONE

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

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

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

       8MB             NONE         (1) 2M x 36         NONE

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

      10MB             NONE        (1) 512K x 36     (1) 2M x 36

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

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

      16MB          (4) 4M x 9          NONE            NONE

      16MB             NONE         (1) 4M x 36         NONE

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

      20MB          (4) 1M x 9          NONE         (1) 4M x 36

      20MB             NONE         (1) 1M x 36      (1) 4M x 36

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

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

      32MB             NONE         (1) 8M x 36         NONE

      64MB             NONE         (1) 8M x 36      (1) 8M x 36

                    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        NONE       (1) 8K x 8

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

                     CACHE JUMPER CONFIGURATION

   Size     JP10      JP11     JP13      JP24      JP25      JP36

   64KB     Open      Open     2 & 3     Closed   Closed    2 & 3

  128KB     Open     Closed    1 & 2     Open      Open      Open

  256KB     Closed   Closed    2 & 3     Closed   Closed    2 & 3

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

     Type          JP3       JP4        JP5      JP6       JP7      JP8

    80486SX       Open       Open       Open    1 & 2     Open     2 & 3

   SL80486SX      Open       Open       Open    1 & 2     Open     2 & 3

  CX486M7 (1x)    1 & 2      Open      2 & 3    2 & 3     Open     1 & 2

  CX486M7 (2x)    1 & 2      Open      2 & 3    2 & 3     Open     1 & 2

    80486DX       1 & 2      Open      2 & 3    1 & 2     Open     1 & 2

   SL80486DX      1 & 2      Open      2 & 3    1 & 2     Open     1 & 2

   80486DX2       1 & 2      Open      2 & 3    1 & 2     Open     1 & 2

   80486DX4       1 & 2      Open      2 & 3    1 & 2     Open     1 & 2

   P24D (WB)      1 & 2      Open      2 & 3    1 & 2     1 & 2    1 & 2

   P24D (WT)      1 & 2      Open      2 & 3    1 & 2     2 & 3    1 & 2

     P24T         1 & 2     Closed     2 & 3    1 & 2     Open     1 & 2

  Note: Pins designated should be in the closed position.

                      CPU TYPE CONFIGURATION (CONT)

    Type       JP9     JP12     JP22    JP23     JP27     JP40     JP43

   80486SX     Open    Open      1 &    Open     Open     Open     Open
                                 2

  SL80486SX    Open    Open      1 &    Open     Open     Open     Open
                                 2

   CX486M7     1 &     Open      1 &    Open      1 &     Open     Open
    (1x)        2                2                2

   CX486M7     1 &     Open      1 &    Open      2 &     Open     Open
    (2x)        2                2                3

   80486DX     Open    Open      1 &    Open     Open     Open     Open
                                 2

  SL80486DX    Open    Open      1 &    Open     Open     Open     Open
                                 2

  80486DX2     Open    Open      1 &    Open     Open     Open     Open
                                 2

  80486DX4     Open    Open      1 &    Open     Open    Closed     see
                                 2                                 below

  P24D (WB)    2 &     Closed    1 &    Closed   Open     Open     Open
                3                2

  P24D (WT)    2 &     Closed    1 &    Closed   Open     Open     Open
                3                2

    P24T       2 &     Open      1 &    Open     Open     Open     Open
                3                2

  Note: Pins designated should be in the closed position.

    CPU SPEED CONFIGURATION

   Speed      JP38      JP39

   25MHz      Open     Closed

   33MHz     Closed     Open

   40MHz      Open      Open

  50iMHz      Open     Closed

   50MHz     Closed    Closed

  66iMHz     Closed     Open

  75iMHz      Open     Closed

  100iMHz    Closed     Open

  CPU CLOCK SPEED CONFIGURATION (80486DX4)

        Speed                  JP43

          2x                   Open

         2.5x            pins 2 & 3 closed

          3x             pins 1 & 2 closed

  CPU VOLTAGE CONFIGURATION

    Voltage          JP1

     3.3v           Open

      5v           Closed

  VESA WAIT STATE CONFIGURATION

   Wait states         JP33

  0 wait states        Open

  1 wait state        Closed

  BUS SPEED CONFIGURATION

  CPU speed        JP34

   <= 33MHz        Open

   > 33MHz        Closed

