
FREE COMPUTER TECHNOLOGY, INC.

80486L-ISA

Processor             80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed       20/25/33/50(internal)/50/66(internal)MHz
Chip Set              UNI
Max. Onboard DRAM     128MB
SRAM Cache            64/128/256KB
BIOS                  AMI/Award
Dimensions            254mm x 218mm
I/O Options           32-bit local bus card slot
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  32-bit local bus card      CN1       Speaker                     H4

  Turbo switch                H1       Power LED & keylock         H5

  Turbo LED                   H2       External battery            JP1

  Reset switch                H3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color               JP12             open

      Monitor type select monochrome          JP12            closed

                          CPU TYPE CONFIGURATION

     U26           U51          J4         J5         J7           J8

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

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

   80487SX       80486DX      pins 1 &    pins 2    closed        open
                             2 and 3 &     & 3
                                 4

   80486SX       80486DX      pins 2 &    open      closed        open
                                 3

     NONE        80486DX      pins 1 &    pins 1     open        closed
                             2 and 3 &     & 2
                                 4

  Note:Pins designated should be in the closed position.

  U51 is a surface mounted CPU (PQFP) that may or may not have been
  installed at the factory.

  U26 is a socketed CPU (PGA) that has been installed at the factory, or
  can be installed by the user.

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

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

  16MB       (4) 4M x 9           NONE

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

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

  64MB      (4) 16M x 9           NONE

  80MB      (4) 16M x 9        (4) 4M x 9

  128MB     (4) 16M x 9       (4) 16M x 9

                  SRAM JUMPER CONFIGURATION

        Size                 JP2                  JP3

        64KB                 open                 open

        128KB          pins 2 & 3 closed         closed

        256KB          pins 1 & 2 closed         closed

                    SRAM CONFIGURATION

     Size        Cache SRAM      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

