TEXAS MICRO, INC.

L386SX CPU (REV. B)

Device Type               Single board computer
Processor                 AM386SX/80386SX
Processor Speed           Unidentified
Chip Set                  Unidentified
Video Chip Set            Unidentified
Maximum Onboard Memory    16MB
Maximum Video Memory      Unidentified
Cache                     64KB
BIOS                      Unidentified
Dimensions                338mm x 122mm
I/O Options               Floppy drive interface, IDE interface, parallel
                          port, serial ports (2)
NPU options               80387SX

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  Serial port 1              CN1       External battery           JP1

  Parallel port              CN2       IDE interface LED          JP7

  Keyboard connector         CN3       Auxiliary keyboard        JP12
                                       connector

  IDE interface              J1        Video board               JP14
                                       connector

  Floppy drive               J2        Video board               JP16
  interface                            connector

  Serial port 2              J3

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      On board battery enabled                JP1           Pins 1 & 2
                                                              closed

      On board battery disabled               JP1           Pins 2 & 3
                                                              closed

      Watchdog timer enabled                  JP13          Pins 1 & 2
                                                              closed

      Watchdog timer disabled                 JP13          Pins 2 & 3
                                                              closed

  »   Factory configured - do not alter       JP17          Pins 2 & 3
                                                              closed

  »   Factory configured - do not alter       JP18          Pins 2 & 3
                                                              closed

  »   Factory configured - do not alter       JP19             Open

  »   Factory configured - do not alter       JP20          Pins 1 & 2
                                                              closed

  »   Factory configured - do not alter       JP21          Pins 1 & 2
                                                              closed

  »   Monitor type select color              SW1/1              On

      Monitor type select monochrome         SW1/1             Off

      Flash memory enabled                   SW1/2             Off

      Flash memory disabled                  SW1/2              On

  »   CMOS memory normal operation           SW1/3             Off

      CMOS memory clear                      SW1/3              On

      I/O address select 270H                SW1/4             Off

      I/O address select 370H                SW1/4              On

  Note: The location of JP19, JP20 & JP21 are unidentified.

             SIMM CONFIGURATION

      Size         Bank 0         Bank 1

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

      2MB        (2) 1M x 9        None

      4MB        (2) 1M x 9     (2) 1M x 9

      8MB        (2) 4M x 9        None

      16MB       (2) 4M x 9     (2) 4M x 9

                CACHE CONFIGURATION

  Note: The location of the cache is unidentified.

             CACHE JUMPER CONFIGURATION

   Size     JP2      JP3     JP4      JP5     JP6

   64KB    1 & 2    1 & 2   1 & 2    1 & 2   1 & 2

                VIDEO MEMORY CONFIGURATION

  Note: The location of the video memory is unidentified.

                           SERIAL PORT SELECTION

       Setting               JP8              JP9               JP10

  »       RS-232          Pins 2 & 3       Pins 2 & 3        Pins 2 & 3
                           closed            closed            closed

          RS-422          Pins 1 & 2       Pins 1 & 2        Pins 1 & 2
                           closed            closed            closed

          RS-485          Pins 1 & 2       Pins 1 & 2        Pins 1 & 2
                           closed            closed            closed

           WATCHDOG SELECTION

       Seconds              JP15

    » 1.2 seconds    Pins 1 & 2 closed

        150ms        Pins 2 & 3 closed

        600ms               Open