
FREE COMPUTER TECHNOLOGY, INC.

80486VESA

Processor           80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed     20/25/33/40/50(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 slot (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 card (2)      S1 & S2

  Turbo LED                  JP16

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                JP2             Open

      Monitor type select monochrome           JP2            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

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

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

                          CPU SPEED CONFIGURATION

   Speed         JP6          JP7         JP11        J19         JP20

   20MHz        Closed       Closed     pins 1 &      Open        Open
                                           2

   25MHz         Open        Closed     pins 1 &      Open        Open
                                           2

   33MHz        Closed        Open      pins 1 &      Open        Open
                                           2

   40MHz        Closed       Closed     pins 2 &     Closed      Closed
                                           3

  50i MHz        Open        Closed     pins 1 &      Open        Open
                                           2

   50MHz         Open        Closed     pins 2 &     Closed      Closed
                                           3

  66i MHz       Closed        Open      pins 1 &      Open        Open
                                           2

  Note:Pins designated should be in the closed postion.

                          CPU TYPE CONFIGURATION

    CPU Type          JP9          JP10          JP22           JP23

  80486SX PQFP     pins 1 & 2,   pins 1 & 2     Closed          Open
                     3 & 4

  80486DX PQFP     pins 1 & 2,   pins 1 & 2     Closed          Open
                     3 & 4

   80486SX PGA     pins 2 & 3      Open          Open          Closed

   80487SX PGA     pins 1 & 2    pins 2 & 3      Open          Closed
                   and 3 & 4

   80486DX PGA     pins 1 & 2    pins 1 & 2      Open          Closed
                   and 3 & 4

  ODP486SX PGA     pins 1 & 2    pins 2 & 3      Open          Closed
                   and 3 & 4

  80486DX2 PGA     pins 1 & 2    pins 1 & 2      Open          Closed
                   and 3 & 4

  Note:Pins designated should be in the closed postion.

                            SRAM CONFIGURATION

    Size       Cache       Location        TAG        JP12         JP13

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

   128KB      (4) 32K x     Bank 0       (1) 8K x    Closed      pins 1 &
                 8                          8                       2

   256KB      (8) 32K x   Banks 0 & 1    (1) 32K     Closed      pins 2 &
                 8                         x 8                      3

  Note:Pins designated should be in the closed position.

