
ORCHID TECHNOLOGY

SUPERBOARD 486/VLB

Processor             80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed       20/25/33/50(internal)/50/66(internal)MHz
Chip Set              OPTI
Max. Onboard DRAM     32MB
Cache                 64/256KB
BIOS                  AMI
Dimensions            330mm x 218mm
I/O Options           32-bit VESA local bus slots (2)
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  Power LED & keylock         J23       32-bit VESA local       S1 - S2
                                        bus slots

  Speaker                     J24       Reset switch              SW1

  Turbo LED                  JP12       Turbo switch              SW2

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Monitor type select color                JP1             Open

      Monitor type select monochrome           JP1            Closed

     CMOS memory normal operation             JP2           pins 2 & 3
                                                              closed

      CMOS memory clear                        JP2           pins 1 & 2
                                                              closed

     Factory configured - do not alter        JP14             N/A

     Factory configured - do not alter        JP15           Closed
      (VESA host select 80486)

     Factory configured - do not alter        JP16            Open
      (VESA host select 80486)

     VESA high speed write wait state         JP17           Closed
      select one

      VESA high speed write wait state         JP17            Open
      select zero

     CPU speed select > 33MHz                 JP18           Closed

      CPU speed select  33MHz                 JP18            Open

     Factory configured - do not alter        JP19           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

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

      16MB        (4) 4M x 9         NONE

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

                          CPU TYPE CONFIGURATION

       Type         Oscillator     JP4       JP5       JP6        JP7

  80486SX-20MHz       20MHz       1 & 2     Open      2 & 3       Open

  80486SX-20MHz       40MHz       2 & 3     Open      2 & 3       Open

  80486SX-25MHz       25MHz       1 & 2     Open      2 & 3       Open

  80486SX-25MHz       50MHz       2 & 3     Open      2 & 3       Open

  ODP486SX-25MHz      25MHz       1 & 2     Open      2 & 3       Open

  ODP486SX-25MHz      50MHz       2 & 3     Open      2 & 3       Open

  80486DX-25MHz       25MHz       1 & 2     2 & 3     1 & 2      Closed

  80486DX-33MHz       66MHz       2 & 3     2 & 3     1 & 2      Closed

  80486DX-50MHz       50MHz       1 & 2     2 & 3     1 & 2      Closed

  80486DX2-50MHz      25MHz       1 & 2     2 & 3     1 & 2      Closed

  80486DX2-50MHz      50MHz       2 & 3     2 & 3     1 & 2      Closed

  80486DX2-66MHz      66MHz       2 & 3     2 & 3     1 & 2      Closed

  Note: Pins designated should be in the closed position.

     CACHE CONFIGURATION

     Size          Bank 0

     64KB        (9) 8K x 8

     256KB      (9) 32K x 8

           CACHE JUMPER CONFIGURATION

   Size      JP8       JP9      JP10      JP11

   64KB     Open      Open      Open      Open

  256KB    Closed    Closed     Open     Closed

