
UNITRON COMPUTER, INC.

3486 SYSTEM TYPE 16

Processor             80386SX/CX486SLC
Processor Speed       16/20/25/33MHz
Chip Set              OPTI
Max. Onboard DRAM     16MB
Cache                 None
BIOS                  Phoenix
Dimensions            254mm x 218mm
I/O Options           Floppy drive interface, game port, IDE interface,
                      parallel port, serial ports (2), VGA port
NPU Options           80387SX

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  Game port                  CN1      IDE interface                J23

  VGA port                   CN2      IDE interface LED            J24

  Parallel port              CN3      Turbo LED                    J26

  Serial port 2              CN4      Turbo LED                    J30

  Serial port 1              CN5      Power LED & keylock          J31

  Chassis fan power          J13      Floppy drive interface       J32

  Reset switch               J14      Riser Card                   SL1

  Speaker                    J21

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Hard drive installed                     J1            pins 2 & 3
                                                              closed

      Hard drive not installed                 J1            pins 1 & 2
                                                              closed

     Serial port B enabled                    J3            pins 1 & 2
                                                              closed

      Serial port B disabled                   J3            pins 2 & 3
                                                              closed

     Game port enabled                        J4            pins 1 & 2
                                                              closed

      Game port disabled                       J4            pins 2 & 3
                                                              closed

     Parallel port enabled                    J7            pins 1 & 2
                                                              closed

      Parallel port disabled                   J7            pins 2 & 3
                                                              closed

     Serial port A enabled                    J8            pins 1 & 2
                                                              closed

      Serial port A disabled                   J8            pins 2 & 3
                                                              closed

     Parallel port select LPT1                J9            pins 1 & 2
                                                              closed

      Parallel port select LPT2                J9            pins 2 & 3
                                                              closed

     Monitor type select color                J11           pins 1 & 2
                                                              closed

      Monitor type select monochrome           J11           pins 2 & 3
                                                              closed

     Display type select non                  J15             Open
      interlaced

      Display type select intrlaced            J15            Closed

     NPU synchronous with CPU                 J16             Open

      NPU asynchronous with CPU                J16            Closed

     Floppy drive interface enabled           J25           pins 1 & 2
                                                              closed

      Floppy drive interface disabled          J25           pins 2 & 3
                                                              closed

     IDE interface enabled                    J27           pins 1 & 2
                                                              closed

      IDE interface disabled                   J27           pins 2 & 3
                                                              closed

     Turbo LED enabled on J26 (System         J29           pins 1 & 2
      M)                                                      closed

      Floppy drive LED enabled on J26          J29           pins 2 & 3
      (System B; open J30)                                    closed

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1         Bank 2         Bank 3

     512KB      (2) 256K x 9      NONE           NONE           NONE

      1MB       (2) 256K x 9   (2) 256K x 9      NONE           NONE

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

      2MB        (2) 1M x 9       NONE           NONE           NONE

      3MB       (2) 256K x 9   (2) 1M x 9     (2) 256K x 9      NONE

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2          Bank 3

     5MB        (2) 256K x 9   (2) 1M x 9     (2) 256K x 9    (2) 1M x 9

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

     8MB        (2) 1M x 9     (2) 1M x 9     (2) 1M x 9      (2) 1M x 9

     8MB        (2) 4M x 9        NONE           NONE            NONE

     12MB       (2) 1M x 9     (2) 4M x 9     (2) 1M x 9         NONE

     16MB       (2) 4M x 9     (2) 4M x 9        NONE            NONE

                        CPU TYPE CONFIGURATION

               Type                               J28

              80386SX                             Open

             80486SLC               pins 1 & 2, 3 & 4, 5 & 6 closed

                   CPU SPEED CONFIGURATION

        Speed                J35                  J38

        16MHz          pins 1 & 2 closed   pins 1 & 2 closed

        20MHz          pins 1 & 2 closed   pins 2 & 3 closed

        25MHz          pins 2 & 3 closed   pins 1 & 2 closed

        33MHz          pins 2 & 3 closed   pins 2 & 3 closed

                        FLOPPY DRIVE CONFIGURATION

     Type           J17            J18            J19            J20

   System B      pins 1 & 2     pins 1 & 2     pins 1 & 2     pins 1 & 2
                  closed         closed         closed          closed

   System M      pins 2 & 3     pins 2 & 3     pins 2 & 3     pins 2 & 3
                  closed         closed         closed          closed

            Note: System B- drive B has twisted cable; drive A has
            straight cable. System M- drive B has straight cable; drive A
            has twisted cable

        SERIAL PORT CONFIGURATION

       Port 1                J10

        COM1          pins 1 & 2 closed

        COM3          pins 2 & 3 closed

        SERIAL PORT CONFIGURATION

       Port 2                 J2

        COM2          pins 1 & 2 closed

        COM4          pins 2 & 3 closed

                       VRAM 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

    ON BOARD VGA CONFIGURATION

  Setting       J36        J37

  Enabled     Closed      Closed

  Disabled     Open        Open

