
FORCOM TECHNOLOGY CORPORATION

80486 DX/SX CACHE

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   20/25/33/50i/66iMHz
Chip Set          ALI
Max. Onboard DRAM 32MB
Cache             128/256KB
BIOS              Award
Dimensions        330mm x 218mm
I/O Options       Floppy drive interface, IDE interface, parallel port,
                  PS/2 mouse port,

                  serial ports (2), VGA port
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  Serial port 1              CN1      Speaker                      CN7

  Serial port 2              CN2      Reset switch                 CN8

  Parallel port              CN3      Floppy drive interface       CN9

  VGA port                   CN4      IDE interface               CN10

  Power LED & keylock        CN5      IDE interface LED            JP8

  Turbo switch & LED         CN6

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Monitor in interlace mode                JP7            Closed

      Monitor in non-interlace mode            JP7             Open

     Monitor type select monochrome           JP10           Closed

      Monitor type select color                JP10            Open

     CPU clock select 33MHz                   JP11          pins 2 & 3
                                                              closed

      CPU clock select 25MHz                   JP11          pins 1 & 2
                                                              closed

      VGA display enabled                      JP12          pins 2 & 3
                                                              closed

      VGA display disabled                     JP12          pins 1 & 2
                                                              closed

      VESA monitor enabled                     JP14          pins 1 & 2
                                                              closed

      VGA monitor enabled                      JP14          pins 2 & 3
                                                              closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 3

      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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

                   BUS CLOCK CONFIGURATION

      OSC Clock              JP3                  JP6

        32MHz          pins 2 & 3 closed   pins 2 & 3 closed

        40MHz          pins 2 & 3 closed   pins 1 & 2 closed

        50MHz          pins 1 & 2 closed   pins 2 & 3 closed

        66MHz          pins 1 & 2 closed   pins 1 & 2 closed

                    CPU TYPE CONFIGURATION

      CPU Type               JP4                  JP5

       80486SX               Open          pins 1 & 2 closed

       80487SX         pins 1 & 2 closed   pins 2 & 3 closed

       80486DX         pins 2 & 3 closed   pins 2 & 3 closed

      80486DX2         pins 2 & 3 closed   pins 2 & 3 closed

