
FREE COMPUTER TECHNOLOGY, INC.

80486VISA

Processor            80486SX/80487SX/80486DX/80486DX2
Processor Speed      20/25/33/50(internal)/50/66(internal)MHz
Chip Set             SIS
Max. Onboard DRAM    32MB
SRAM Cache           64/128/256KB
BIOS                 AMI
Dimensions           254mm x 218mm
I/O Options          32-bit VESA local bus (2)
NPU Options          None

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  External battery          JP1        Speaker                   JP17

  Reset switch              JP14       Power LED & keylock       JP18

  Turbo switch              JP15       32-bit VESA local       S1 & S2
                                       bus slots (2)

  Turbo LED                 JP16

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome           JP2            Closed

      Monitor type select color                JP2             Open

              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) 1M x 9         NONE

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K x 9

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

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

                    SRAM CONFIGURATION

     Size          Cache         Location         TAG

     64KB        (8) 8K x 8    Banks 0 & 1    (1) 8K x 8

     128KB      (4) 32K x 8       Bank 0      (1) 8K x 8

     256KB      (8) 32K x 8    Banks 0 & 1    (1) 32K x 8

                  SRAM JUMPER CONFIGURATION

        Size                 JP12                 JP13

        64KB                 Open                 Open

        128KB               Closed         pins 1 & 2 closed

        256KB               Closed         pins 2 & 3 closed

                         CPU JUMPER CONFIGURATION

           CPU                     JP9                      JP10

        80486DX2           pins 1 & 2 and 3 & 4      pins 1 & 2 closed
                                  closed

         80486DX           pins 1 & 2 and 3 & 4      pins 1 & 2 closed
                                  closed

        ODP486SX           pins 1 & 2 and 3 & 4      pins 2 & 3 closed
                                  closed

         80487SX           pins 1 & 2 and 3 & 4      pins 2 & 3 closed
                                  closed

         80486SX            pins 2 & 3 closed               Open

                      CPU SPEED JUMPER CONFIGURATION

      Speed              JP6                JP7               JP11

      20MHz             Closed            Closed        pins 1 & 2 closed

    25/50i MHz           Open             Closed        pins 1 & 2 closed

    33/66i MHz          Closed             Open         pins 1 & 2 closed

      40MHz             Closed            Closed        pins 2 & 3 closed

      50MHz              Open             Closed        pins 2 & 3 closed

