
FORCOM TECHNOLOGY CORPORATION

FT-1338A

Processor  80486SX/AM486DX/80486DX/AM486DX2/AM486DX2(WB)/
           AM486DX2(WT)/80486DX2/AM486DX4/AM486DX4(WB)/
           AM486DX4(WT(/80486DX4/CXM7/STM7/IBMM7/TIM7/CX5X86(WB)/
           CX5X86(WT)/ST5X86(WB)/ST5X86(WT)/IBM5X86(WB)/IBM5X86(WT)/
           TI5X86(WB)/TI5X86(WT)/ AM5X86(WB)/AM5X86(WT)
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   SIS
Video Chip Cirrus Logic
Set
Maximum    128MB (EDO supported)
Onboard
Memory
Maximum    2MB
Video
Memory
Cache      128/256/512KB
BIOS       Award
Dimensions 220mm x 220mm
I/O        Floppy drive interface, green PC connector, IDE interfaces (2),
Options    parallel port, PS/2 mouse interface, serial ports (2), VGA feature
           connector, VGA port, riser slot, IR connector
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose            Location      Purpose                Location

  PS/2 mouse           CN2A        External                  J1
  interface                        battery

  Serial port 1         CN3        Green PC                  J3
                                   connector

  Serial port 2         CN4        Speaker             J4 pins 1/3/5/7

  Parallel port         CN5        Reset switch         J4 pins 2 & 4

  VGA port              CN6        IDE interface        J4 pins 6 & 8
                                   LED

  IR connector          CN7        Power LED &             J4 pins
                                   keylock             11/13/15/17/19

  VGA feature           CN8        Turbo LED           J4 pins 12 & 14
  connector

  Floppy drive          CN9        Turbo switch       J4 pins 16/18/20
  interface

  IDE interface 1      CN10        Riser slot                SL1

  IDE interface 2      CN11

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not           JP1          Unidentified
      alter

     Factory configured - do not           JP2          Unidentified
      alter

     On board video enabled                JP5        Pins 1 & 2 closed

      On board video disabled               JP5        Pins 2 & 3 closed

     CMOS memory normal operation          JP6        Pins 1 & 2 closed

      CMOS memory clear                     JP6        Pins 2 & 3 closed

     Factory configured - do not          JP11          Unidentified
      alter

     Factory configured - do not          JP12          Unidentified
      alter

      Monitor type select color            JP14             Closed

      Monitor type select monochrome       JP14              Open

     Factory configured - do not          JP15          Unidentified
      alter

     Power good signal detect from        JP20        Pins 2 & 3 closed
      board

      Power good signal detect from        JP20        Pins 1 & 2 closed
      power supply

      Buzzer enabled                       JP31             Closed

      Buzzer disabled                      JP31              Open

     Factory configured - do not          JP34          Unidentified
      alter

     Factory configured - do not          JP35          Unidentified
      alter

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       1MB        (1) 256K x 36         None

       2MB        (1) 512K x 36         None

       2MB        (1) 256K x 36    (1) 256K x 36

       3MB        (1) 512K x 36    (1) 256K x 36

       4MB         (1) 1M x 36          None

       4MB        (1) 512K x 36    (1) 512K x 36

                  DRAM CONFIGURATION (CONT)

        Size                Bank 0               Bank 1

         5MB             (1) 1M x 36         (1) 256K x 36

         6MB             (1) 1M x 36         (1) 512K x 36

         8MB             (1) 2M x 36              None

         8MB             (1) 1M x 36          (1) 1M x 36

         9MB             (1) 2M x 36         (1) 256K x 36

        10MB             (1) 2M x 36         (1) 512K x 36

        12MB             (1) 2M x 36          (1) 1M x 36

        16MB             (1) 4M x 36              None

        16MB             (1) 2M x 36          (1) 2M x 36

        17MB             (1) 4M x 36         (1) 256K x 36

        18MB             (1) 4M x 36         (1) 512K x 36

        20MB             (1) 4M x 36          (1) 1M x 36

        24MB             (1) 4M x 36          (1) 2M x 36

        32MB             (1) 8M x 36              None

        32MB             (1) 4M x 36          (1) 4M x 36

        33MB             (1) 8M x 36         (1) 256K x 36

        34MB             (1) 8M x 36         (1) 512K x 36

        36MB             (1) 8M x 36          (1) 1M x 36

        40MB             (1) 8M x 36          (1) 2M x 36

        48MB             (1) 8M x 36          (1) 4M x 36

        64MB             (1) 8M x 36          (1) 8M x 36

        64MB             (1) 16M x 36             None

        128MB            (1) 16M x 36         (1) 16M x 36

  Note: Board accepts EDO memory. Banks are interchangeable.

              CACHE CONFIGURATION

      Size          Bank 0           TAG

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

     256KB        (4) 64K x 8    (1) 32K x 8

     512KB        (4) 128K x 8   (1) 32K x 8

                  CACHE JUMPER CONFIGURATION

        Size                 JP18                 JP19

        128KB          Pins 1 & 2 closed   Pins 1 & 2 closed

        256KB          Pins 1 & 2 closed   Pins 2 & 3 closed

        512KB          Pins 2 & 3 closed   Pins 2 & 3 closed

       VIDEO MEMORY CONFIGURATION

   Size     Bank 0   Bank 1    Bank 2

  512KB     512MB     None      None

   1MB      512MB     512MB     None

   2MB      512MB     512MB      1MB

                            CPU SPEED SELECTION

          Speed                    JP13                     JP17

          25MHz             Pins 1 & 2 closed               Open

          33MHz             Pins 1 & 2 closed         Pins 1 & 2, 3 & 4
                                                           closed

          40MHz             Pins 2 & 3 closed        Pins 1 & 2 closed

         50iMHz             Pins 1 & 2 closed               Open

          50MHz             Pins 2 & 3 closed        Pins 3 & 4 closed

         66iMHz             Pins 1 & 2 closed         Pins 1 & 2, 3 & 4
                                                           closed

         75iMHz             Pins 1 & 2 closed               Open

         100iMHz            Pins 1 & 2 closed         Pins 1 & 2, 3 & 4
                                                           closed

                            CPU TYPE SELECTION

       Type            JP7       JP8        JP9        JP10       JP16

      80486SX         4 & 5      Open      2 & 3       Open       1 & 2

      AM486DX         4 & 5      Open      1 & 2,      Open       1 & 2
                                           3 & 4

      80486DX         4 & 5      Open      1 & 2,      Open       1 & 2
                                           3 & 4

     AM486DX2         4 & 5      Open      1 & 2,      Open       1 & 2
                                           3 & 4

   AM486DX2 (V8B,     4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
      WB, 2x)                              3 & 4       & 4

   AM486DX2 (V8B,     4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
      WB, 3x)                              3 & 4       & 4

   AM486DX2 (V8B,     4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
      WT, 2x)                              3 & 4       & 4

   AM486DX2 (V8B,     4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
      WT, 3x)                              3 & 4       & 4

  AM486DX2 (V8T)      4 & 5      Open      1 & 2,      Open       1 & 2
                                           3 & 4

     80486DX2         4 & 5      Open      1 & 2,      Open       1 & 2
                                           3 & 4

   AM486DX4 (2x)      4 & 5     4 & 5      1 & 2,     3 & 4       1 & 2
                                           3 & 4

   AM486DX4 (3x)      4 & 5     4 & 5      1 & 2,     3 & 4       1 & 2
                                           3 & 4

   AM486DX4 (V8B,     4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
      WB, 2x)                              3 & 4       & 4

   AM486DX4 (V8B,     4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
      WB, 3x)                              3 & 4       & 4

   AM486DX4 (V8B,     4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
      WT, 2x)                              3 & 4       & 4

   AM486DX4 (V8B,     4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
      WT, 3x)                              3 & 4       & 4

  AM486DX4 (V8T)      4 & 5      Open      1 & 2,      Open       1 & 2
                                           3 & 4

   80486DX4 (2x)      4 & 5     4 & 5      1 & 2,     3 & 4       1 & 2
                                           3 & 4

  80486DX4 (2.5x)     4 & 5     4 & 5      1 & 2,     3 & 4       1 & 2
                                           3 & 4

   80486DX4 (3x)      4 & 5     4 & 5      1 & 2,     3 & 4       1 & 2
                                           3 & 4

       CX M7          4 & 5     2 & 3      1 & 2,     2 & 3       1 & 2
                                           3 & 4

       ST M7          4 & 5     2 & 3      1 & 2,     2 & 3       1 & 2
                                           3 & 4

      IBM M7          4 & 5     2 & 3      1 & 2,     2 & 3       1 & 2
                                           3 & 4

       TI M7          4 & 5     2 & 3      1 & 2,     2 & 3       1 & 2
                                           3 & 4

  CX 5X86 (WB, 2x)    4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
                                           3 & 4       & 4

  CX 5X86 (WT, 2x)    4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
                                           3 & 4       & 4

  CX 5X86 (WB, 3x)    4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
                                           3 & 4       & 4

  CX 5X86 (WT, 3x)    4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
                                           3 & 4       & 4

  ST 5X86 (WB, 2x)    4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
                                           3 & 4       & 4

  ST 5X86 (WT, 2x)    4 & 5     4 & 5      1 & 2,    1 & 2, 3     1 & 2
                                           3 & 4       & 4

                        CPU TYPE SELECTION (CONT)

      Type           JP7        JP8        JP9        JP10        JP16

   ST 5X86 (WB,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       3x)                                 & 4         & 4

   ST 5X86 (WT,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       3x)                                 & 4         & 4

  IBM 5X86 (WB,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       2x)                                 & 4         & 4

  IBM 5X86 (WT,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       2x)                                 & 4         & 4

  IBM 5X86 (WB,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       3x)                                 & 4         & 4

  IBM 5X86 (WT,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       3x)                                 & 4         & 4

   TI 5X86 (WB,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       2x)                                 & 4         & 4

   TI 5X86 (WT,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       2x)                                 & 4         & 4

   TI 5X86 (WB,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       3x)                                 & 4         & 4

   TI 5X86 (WT,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       3x)                                 & 4         & 4

   AM 5X86 (WB,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       3x)                                 & 4         & 4

   AM 5X86 (WT,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       4x)                                 & 4         & 4

   AM 5X86 (WB,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       3x)                                 & 4         & 4

   AM 5X86 (WT,     4 & 5      4 & 5     1 & 2, 3    1 & 2, 3     1 & 2
       4x)                                 & 4         & 4

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CONT)

       Type           JP21       JP22       JP23       JP24        JP25

      80486SX         Open       Open       Open       Open        Open

      AM486DX         Open       Open       Open       Open       2 & 3

      80486DX         Open       Open       Open       Open       2 & 3

     AM486DX2         Open       Open       Open       Open       2 & 3

   AM486DX2 (V8B,    1 & 2       Open       2 & 3      2 & 3      2 & 3
      WB, 2x)

   AM486DX2 (V8B,    1 & 2       Open       Open       2 & 3      2 & 3
      WB, 3x)

   AM486DX2 (V8B,    1 & 2       Open       2 & 3      2 & 3      2 & 3
      WT, 2x)

   AM486DX2 (V8B,    1 & 2       Open       Open       2 & 3      2 & 3
      WT, 3x)

  AM486DX2 (V8T)      Open       Open       Open       Open       2 & 3

     80486DX2         Open       Open       Open       Open       2 & 3

   AM486DX4 (2x)      Open       Open       2 & 3      Open       2 & 3

   AM486DX4 (3x)      Open       Open       Open       Open       2 & 3

   AM486DX4 (V8B,    1 & 2       Open       2 & 3      2 & 3      2 & 3
      WB, 2x)

   AM486DX4 (V8B,    1 & 2       Open       Open       2 & 3      2 & 3
      WB, 3x)

   AM486DX4 (V8B,    1 & 2       Open       2 & 3      2 & 3      2 & 3
      WT, 2x)

   AM486DX4 (V8B,    1 & 2       Open       Open       2 & 3      2 & 3
      WT, 3x)

  AM486DX4 (V8T)      Open       Open       Open       Open       2 & 3

   80486DX4 (2x)      Open       Open       2 & 3      Open       2 & 3

  80486DX4 (2.5x)     Open       Open       1 & 2      Open       2 & 3

   80486DX4 (3x)      Open       Open       Open       Open       2 & 3

       CX M7         2 & 3      2 & 3       Open       Open       2 & 3

       ST M7         2 & 3      2 & 3       Open       Open       2 & 3

      IBM M7         2 & 3      2 & 3       Open       Open       2 & 3

                        CPU TYPE SELECTION (CONT)

       Type           JP21       JP22        JP23       JP24       JP25

      TI M7          2 & 3       2 & 3       Open       Open       2 & 3

   CX 5X86 (WB,      1 & 2       Open       2 & 3       2 & 3      2 & 3
       2x)

   CX 5X86 (WT,      1 & 2       Open       2 & 3       2 & 3      2 & 3
       2x)

   CX 5X86 (WB,      1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   CX 5X86 (WT,      1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   ST 5X86 (WB,      1 & 2       Open       2 & 3       2 & 3      2 & 3
       2x)

   ST 5X86 (WT,      1 & 2       Open       2 & 3       2 & 3      2 & 3
       2x)

   ST 5X86 (WB,      1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   ST 5X86 (WT,      1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   IBM 5X86 (WB,     1 & 2       Open       2 & 3       2 & 3      2 & 3
       2x)

   IBM 5X86 (WT,     1 & 2       Open       2 & 3       2 & 3      2 & 3
       2x)

   IBM 5X86 (WB,     1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   IBM 5X86 (WT,     1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   TI 5X86 (WB,      1 & 2       Open       2 & 3       2 & 3      2 & 3
       2x)

   TI 5X86 (WT,      1 & 2       Open       2 & 3       2 & 3      2 & 3
       2x)

   TI 5X86 (WB,      1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   TI 5X86 (WT,      1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   AM 5X86 (WB,      1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   AM 5X86 (WT,      1 & 2       Open       2 & 3       2 & 3      2 & 3
       4x)

   AM 5X86 (WB,      1 & 2       Open        Open       2 & 3      2 & 3
       3x)

   AM 5X86 (WT,      1 & 2       Open       2 & 3       2 & 3      2 & 3
       4x)

  Note: Pins designated should be in the closed position.

                        CPU TYPE SELECTION (CONT)

       Type           JP26       JP27      JP28       JP29        JP30

      80486SX         Open       Open      Open       Open        Open

      AM486DX         Open       Open      Open       Open        Open

      80486DX         Open       Open      Open       Open        Open

     AM486DX2         Open       Open      Open       Open        Open

   AM486DX2 (V8B,    2 & 3       Open      1 & 2      Open       Closed
      WB, 2x)

   AM486DX2 (V8B,    2 & 3       Open      1 & 2      Open       Closed
      WB, 3x)

   AM486DX2 (V8B,    2 & 3       Open      2 & 3      Open       Closed
      WT, 2x)

   AM486DX2 (V8B,    2 & 3       Open      2 & 3      Open       Closed
      WT, 3x)

  AM486DX2 (V8T)      Open       Open      2 & 3      Open       Closed

     80486DX2         Open       Open      Open       Open        Open

   AM486DX4 (2x)     2 & 3       Open      Open       Open       Closed

   AM486DX4 (3x)     2 & 3       Open      Open       Open       Closed

   AM486DX4 (V8B,    2 & 3       Open      1 & 2      Open       Closed
      WB, 2x)

   AM486DX4 (V8B,    2 & 3       Open      1 & 2      Open       Closed
      WB, 3x)

   AM486DX4 (V8B,    2 & 3       Open      2 & 3      Open       Closed
      WT, 2x)

   AM486DX4 (V8B,    2 & 3       Open      2 & 3      Open       Closed
      WT, 3x)

                        CPU TYPE SELECTION (CONT)

        Type           JP26       JP27       JP28        JP29      JP30

   AM486DX4 (V8T)      Open       Open       1 & 2       Open     Closed

   80486DX4 (2x)      2 & 3       Open       Open        Open     Closed

  80486DX4 (2.5x)     2 & 3       Open       Open        Open     Closed

   80486DX4 (3x)      2 & 3       Open       Open        Open     Closed

       CX M7          1 & 2       Open       Open        Open     Closed

       ST M7          1 & 2       Open       Open        Open     Closed

       IBM M7         1 & 2       Open       Open        Open     Closed

       TI M7          1 & 2       Open       Open        Open     Closed

  CX 5X86 (WB, 2x)    2 & 3       Open       1 & 2       Open     Closed

  CX 5X86 (WT, 2x)    2 & 3       Open       2 & 3       Open     Closed

  CX 5X86 (WB, 3x)    2 & 3       Open       1 & 2       Open     Closed

  CX 5X86 (WT, 3x)    2 & 3       Open       2 & 3       Open     Closed

  ST 5X86 (WB, 2x)    2 & 3       Open       1 & 2       Open     Closed

  ST 5X86 (WT, 2x)    2 & 3       Open       2 & 3       Open     Closed

  ST 5X86 (WB, 3x)    2 & 3       Open       1 & 2       Open     Closed

  ST 5X86 (WT, 3x)    2 & 3       Open       2 & 3       Open     Closed

    IBM 5X86 (WB,     2 & 3       Open       1 & 2       Open     Closed
        2x)

    IBM 5X86 (WT,     2 & 3       Open       2 & 3       Open     Closed
        2x)

    IBM 5X86 (WB,     2 & 3       Open       1 & 2       Open     Closed
        3x)

    IBM 5X86 (WT,     2 & 3       Open       2 & 3       Open     Closed
        3x)

  TI 5X86 (WB, 2x)    2 & 3       Open       1 & 2       Open     Closed

  TI 5X86 (WT, 2x)    2 & 3       Open       2 & 3       Open     Closed

  TI 5X86 (WB, 3x)    2 & 3       Open       1 & 2       Open     Closed

  TI 5X86 (WT, 3x)    2 & 3       Open       2 & 3       Open     Closed

  AM 5X86 (WB, 3x)    2 & 3       Open       1 & 2       Open     Closed

  AM 5X86 (WT, 4x)    2 & 3       Open       2 & 3       Open     Closed

  AM 5X86 (WB, 3x)    2 & 3       Open       1 & 2       Open     Closed

  AM 5X86 (WT, 4x)    2 & 3       Open       2 & 3       Open     Closed

  Note: Pins designated should be in the closed position.

                           CPU VOLTAGE SELECTION

         Voltage                   JP32                     JP33

          3.3v              Pins 1 & 2 closed         Pins 1 & 3, 2 & 4
                                                           closed

          3.45v             Pins 3 & 4 closed         Pins 1 & 3, 2 & 4
                                                           closed

           4v               Pins 5 & 6 closed         Pins 1 & 3, 2 & 4
                                                           closed

           5v                      N/A                Pins 1 & 2, 3 & 4
                                                           closed

                               IR SELECTION

           Setting                     JP3                   JP4

   U3 is 665IR, IR via CN7      Pins 1 & 2 closed     Pins 1 & 2 closed

  U3 uses 665GT/669 or 665IR    Pins 2 & 3 closed     Pins 2 & 3 closed
          without IR

