FREE COMPUTER TECHNOLOGY, INC.

80486ISA

Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33/50MHz
Chip Set          OPTI
Max. Onboard DRAM 64MB
Cache             64/128/256/512KB
BIOS              AMI
Dimensions        355mm x 304mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J2       Turbo LED                 JP10

  Power LED & keylock         J21       Reset switch               SW1

  Speaker                     J22       Turbo switch               SW2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select monochrome           JP1            closed

      Monitor type select color                JP1             open

  »   Power good signal detect from           JP400          pins 1 & 2
      power supply                                            closed

      Power good signal detect from           JP400          pins 2 & 3
      board                                                   closed

                            DRAM CONFIGURATION

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9       NONE           NONE           NONE

     2MB        (4) 256K x 9   (4) 256K x 9       NONE           NONE

     4MB         (4) 1M x 9        NONE           NONE           NONE

     5MB        (4) 256K x 9    (4) 1M x 9        NONE           NONE

     6MB        (4) 256K x 9   (4) 256K x 9    (4) 1M x 9        NONE

     8MB         (4) 1M x 9     (4) 1M x 9        NONE           NONE

     9MB        (4) 256K x 9    (4) 1M x 9     (4) 1M x 9        NONE

     10MB       (4) 256K x 9   (4) 256K x 9    (4) 1M x 9     (4) 1M x 9

     12MB        (4) 1M x 9     (4) 1M x 9     (4) 1M x 9        NONE

     13MB       (4) 256K x 9    (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     16MB        (4) 4M x 9        NONE           NONE           NONE

     20MB        (4) 1M x 9     (4) 4M x 9        NONE           NONE

     24MB        (4) 1M x 9     (4) 1M x 9     (4) 4M x 9        NONE

     28MB        (4) 1M x 9     (4) 1M x 9     (4) 1M x 9     (4) 4M x 9

     32MB        (4) 4M x 9     (4) 4M x 9        NONE           NONE

     36MB        (4) 1M x 9     (4) 4M x 9     (4) 4M x 9        NONE

     40MB        (4) 1M x 9     (4) 1M x 9     (4) 4M x 9     (4) 4M x 9

     48MB        (4) 4M x 9     (4) 4M x 9     (4) 4M x 9        NONE

     52MB        (4) 1M x 9     (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

     64MB        (4) 4M x 9     (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

     128KB       (8) 8K x 8     (8) 8K x 8    (1) 8K x 8

     256KB      (8) 32K x 8        NONE       (1) 32K x 8

     512KB      (8) 32K x 8    (8) 32K x 8    (1) 32K x 8

                 CACHE JUMPER CONFIGURATION

   Size       JP4       JP5       JP6       JP8       JP9

   64KB      Open      Open       Open      Open     2 & 3

  128KB      Open      Open      Closed    Closed    2 & 3

  256KB      Open     Closed     Closed    Closed    2 & 3

  512KB     Closed    Closed     Closed    Closed    1 & 2

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type              JP100             JP101              JP102

      80486SX          pins 2 & 3           Open              Open
                         closed

      80487SX          pins 1 & 2          Closed           pins 1 & 2
                         closed                              closed

      80486DX          pins 1 & 2          Closed           pins 2 & 3
                         closed                              closed