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