AMERICAN DIGICOM CORPORATION

286H

Processor         80286
Processor Speed   12/16/20MHz
Chip Set          Suntac
Max. onboard DRAM 5MB
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       IDE interface, floppy drive interface
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                    Location   Purpose                  Location

  IDE interface                CN1      Turbo Switch              JP27

  Floppy drive interface       CN2      Turbo LED                 JP28

  External battery             JP9      Speaker                   JP29

  IDE interface LED           JP17      Power LED & keylock       JP30

  Reset switch                JP26

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   Floppy drive address select            JP5               Closed
      3F4-3F5h

      Floppy drive address select            JP5                Open
      374-375h

  »   BIOS type select 27256             JP6 & JP18          pins 1 & 2
                                                               closed

      BIOS type select 27512             JP6 & JP18          pins 2 & 3
                                                               closed

  »   Floppy drive enabled                  JP10               Closed

      Floppy drive disabled                 JP10                Open

  »   Floppy drive speed select             JP11               Closed
      12MHz

      Floppy drive speed select             JP11                Open
      low 16/20MHz

  »   NPU speed select low (12MHz        JP19 & JP20         pins 1 & 2
      CPU)                                                     closed

      NPU speed select high              JP19 & JP20         pins 2 & 3
      (16/20MHz CPU)                                           closed

  »   I/O bus speed select OSC1/4           JP25               Closed
      for 12/16MHz

      I/O bus speed select OSC2/2           JP25                Open
      for 12/16MHz

  »   Monitor type select color         SW1/switch 1             On

      Monitor type select               SW1/switch 1            Off
      monochrome

  »   Parity enabled                    SW1/switch 2             On

      Parity disabled                   SW1/switch 2            Off

  Note:For a 20Mhz CPU, JP25 should remain open.

                            DRAM CONFIGURATION

   Size     Bank 0    Parity 0    Bank 1    Parity 1   Bank 2     Bank 3

  512KB       (4)        (2)       NONE       NONE      NONE       NONE
             44256     41256

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

   1MB        (4)        (2)        (4)        (2)      NONE       NONE
             44256     41256      44256      41256

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

   2MB        (4)        (2)        (4)        (2)       (2)     (2) 256K
             44256     41256      44256      41256      256K x     x 9
                                                          9

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

   3MB        (4)        (2)        (4)        (2)      (2) 1M     NONE
             44256     41256      44256      41256       x 9

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

   5MB        (4)        (2)        (4)        (2)      (2) 1M   (2) 1M x
             44256     41256      44256      41256       x 9        9

  Note:You may use SIPP modules as bank 0 and bank 1.

                   DRAM SWITCH CONFIGURATION

      Size       SW1/switch 3    SW1/switch 4    SW1/switch 5

     512KB            On              On              On

      1MB             On              On             Off

      2MB             On              Off            Off

      2MB             Off             On              On

      3MB             Off             Off             On

      4MB             Off             On             Off

      5MB             On              Off             On

                       MODULE RAM BANK CONFIGURATION

       Bank             JP21         JP22          JP23          JP24

  SIP RAM as banks   pins 2 & 3    pins 2 & 3   pins 2 & 3    pins 2 & 3
       2 & 3

  SIP RAM as banks   pins 1 & 2    pins 1 & 2   pins 1 & 2    pins 1 & 2
       0 & 1

  Note:Pins designated should be in the closed position.

                         MEMORY MAP CONFIGURATION

     Base        Shadow       Extended      SW1/6      SW1/7      SW1/8
    Memory

    640KB         0KB         remaining       On         On         On
                               memory

    640KB        128KB        remaining       On         On        Off
                               memory

    512KB         0KB         remaining       On        Off         On
                               memory

    512KB        128KB        remaining      Off         On         On
                               memory

    640KB         EMS           64KB         Off        Off         On

    640KB         EMS           0KB          Off         On        Off

    512KB         EMS           64KB         Off        Off         On

    512KB         EMS           0KB          Off        Off        Off

       IDE INTERFACE CONFIGURATION

   Function       JP14          JP15

   Enabled      pins 2 & 3   pins 2 & 3

   Disabled     pins 1 & 2   pins 1 & 2