UNIDENTIFIED

386SX SYSTEM

Processor                   80386SX
Processor Speed             16/25MHz
Chip Set                    Headland
Video Chip Set              Trident
Maximum Onboard Memory      6MB
Maximum Video Memory        1MB
Cache                       None
BIOS                        Phoenix
Dimensions                  396mm x 368mm
I/O Options                 Floppy drive interface, game port, IDE
                            interface, parallel port, serial ports (2), VGA
                            port, riser slot, modem/fax interface
NPU Options                 80387SX

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  Game port                 CN1       Modem/fax interface         J25

  VGA port                  CN2       IDE interface               J27

  Parallel port             CN3       IDE interface LED           J28

  Serial port 2             CN4       Floppy drive interface      J29
                                      LED

  Serial port 1             CN5       Power LED                   J30

  Chassis fan power         J14       Floppy drive interface      J31

  Reset switch              J17       Riser slot                  SL1

  Speaker                   J21

                        USER CONFIGURABLE SETTINGS

                 Function                     Label          Position

      Game port enabled                         J6           Pins 1 & 2
                                                              closed

      Game port disabled                        J6           Pins 2 & 3
                                                              closed

      Serial port 2 enabled                     J8           Pins 1 & 2
                                                              closed

      Serial port 2 disabled                    J8           Pins 2 & 3
                                                              closed

      Parallel port enabled                     J9           Pins 1 & 2
                                                              closed

      Parallel port disabled                    J9           Pins 2 & 3
                                                              closed

      Serial port 2 address select 2F8         J10           Pins 1 & 2
                                                              closed

      Serial port 2 address select 2E8         J10           Pins 2 & 3
                                                              closed

      Parallel port address select 378         J11           Pins 1 & 2
                                                              closed

      Parallel port address select 278         J11           Pins 2 & 3
                                                              closed

      Serial port 1 enabled                    J12           Pins 1 & 2
                                                              closed

      Serial port 1 disabled                   J12           Pins 2 & 3
                                                              closed

      Serial port 1 address select 3F8         J13           Pins 1 & 2
                                                              closed

      Serial port 1 address select 3E8         J13           Pins 2 & 3
                                                              closed

      Monitor type select color                J15           Pins 1 & 2
                                                              closed

      Monitor type select monochrome           J15           Pins 2 & 3
                                                              closed

      Video mode select interlaced             J18            Closed

      Video mode select non interlaced         J18             Open

      NPU synchronous with CPU                 J20             Open

      NPU asynchronous with CPU                J20            Closed

      IDE interface enabled                    J23           Pins 1 & 2
                                                              closed

      IDE interface disabled                   J23           Pins 2 & 3
                                                              closed

      Floppy drive interface enabled           J24           Pins 1 & 2
                                                              closed

      Floppy drive interface disabled          J24           Pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1         Bank 2         Bank 3

     1MB           512KB          512KB          None           None

    1.5MB          512KB          512KB       (2) 256K x 9      None

     2MB           512KB          512KB       (2) 256K x 9  (2) 256K x 9

     3MB           512KB          512KB       (2) 1M x 9        None

     5MB           512KB          512KB       (2) 1M x 9     (2) 1M x 9

     3MB            1MB           None        (2) 256K x 9  (2) 256K x 9

     4MB            1MB           None        (2) 1M x 9        None

     6MB            1MB           None        (2) 1M x 9     (2) 1M x 9

  Note: Bank 0 or banks 0 & 1 are factory installed and is not
  configurable.

                   VIDEO MEMORY CONFIGURATION

    Size        Bank 0       Bank 1      Bank 2       Bank 3

    256KB     (2) 44256       None        None         None

    512KB     (2) 44256    (2) 44256      None         None

     1MB      (2) 44256    (2) 44256    (2) 44256    (2) 44256