
UNIDENTIFIED

VESA X86VLWB

Processor        80386DX/80486SX/80486DX/80486DX2
Processor Speed  25/33/40/50(internal)/66(internal)MHz
Chip Set         Intel
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       330mm x 218mm
I/O Options      32-bit VESA local bus slots (2)
NPU Options      80387DX

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  External battery            J1        Turbo LED                 JP32

  Power LED & keylock         J19       32-bit VESA Local       SL1, SL2
                                        bus slots

  Speaker                     J20       Reset switch              SW1

  Turbo switch               JP31

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS normal operation                   JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP1           pins 1 & 2
                                                              closed

      Bus speed select - Clock/5              JP3             Closed

      Bus speed select - Clock/4              JP3              Open

     Monitor type select monochrome          JP4             Closed

      Monitor type select color               JP4              Open

     Factory configured - do not             JP16             Open
      alter

      Enable 486SX PQFP                       JP17             Open

      Disable 486SX PQFP                      JP17            Closed

      Enable 386DX PQFP                       JP18             Open

      Disable 386DX PQFP                      JP18            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

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

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

           PROCESSOR TYPE CONFIGURATION

    Type         JP2          JP6         JP7

    Cyrix       Closed      Closed       Closed

  Intel/AMD      Open        Open         Open

                    CPU TYPE CONFIGURATION

        Type                 JP5                  JP12

        80386          pins 2 & 3 closed         Closed

        80486          pins 1 & 2 closed          Open

                          CPU CLOCK CONFIGURATION

       Type              Speed              JP25               JP33

      80386DX            25MHz           pins 2 & 3         pins 1 & 2
                                           closed             closed

      80386DX            33MHz           pins 2 & 3         pins 1 & 2
                                           closed             closed

      80486SX            25MHz           pins 2 & 3         pins 2 & 3
                                           closed             closed

      80486SX            33MHz           pins 2 & 3         pins 2 & 3
                                           closed             closed

      80486DX            33MHz           pins 2 & 3         pins 2 & 3
                                           closed             closed

      80486DX            50MHz           pins 1 & 2         pins 1 & 2
                                           closed             closed

     80486DX2            50iMHz          pins 1 & 2         pins 1 & 2
                                           closed             closed

     80486DX2            66iMHz          pins 2 & 3         pins 2 & 3
                                           closed             closed

                        486 PROCESSOR CONFIGURATION

       Type               JP35              JP36               JP37

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

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

     80486DX2           pins 1 & 2         Closed           pins 1 & 2
                         closed                               closed

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U39)      TAG (U40)

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8        NONE

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

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

                        CACHE JUMPER CONFIGURATION

    Size          JP10            JP11           JP13           JP15

    64KB        pins 2 & 3        Open           Open           Open
                 closed

   128KB        pins 2 & 3       Closed         Closed          Open
                 closed

   256KB        pins 1 & 2       Closed         Closed         Closed
                 closed

                 VESA CPU TYPE CONFIGURATION

      CPU Type               JP30                 JP34

        80386          pins 2 & 3 closed   pins 1 & 2 closed

        80486          pins 1 & 2 closed   pins 2 & 3 closed

                   VESA WAIT STATE CONFIGURATION

    CPU speed      Wait states          JP22            JP26

     < 33MHz      0 wait states         Open            Open

     > 33MHz      1 wait states        Closed          Closed

                       MISCELLANEOUS TECHNICAL NOTES

  Note:The VESA bus can be disabled by removing two integrated chips (IC)
  off the system board.

  To disable the VESA bus, ICs located on U29 and U38 must be removed and
  the following

  jumpers must be installed: JP8, JP9, JP14, JP19, JP21, JP23, JP24,
  JP27.

  To enable the VESA bus, insert two ICs at U29 and U38. And all jumpers
  in above paragraph

  must be open.

  Some system boards may have a clock generating device which must be set
  to generate the

  proper clock speed for the CPU. Jumpers JP28 and JP29 are used to set
  the clock frequency

  the device should generate. In most systems, this device is replaced
  with an oscillator.

