
AMERICAN MEGATRENDS, INC.

AMI 386SX-II

Processor              80386SX
Processor Speed        20/25MHz
Chip Set               AMI
Max. Onboard DRAM      16MB
Cache                  32KB
BIOS                   AMI
Dimensions             330mm x 218mm
I/O Options            Floppy interface, IDE interface, parallel port,
                       serial ports (2)
NPU Options            80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  IDE interface LED           J1       Turbo switch                J16

  External battery            J7       Parallel port               P4

  Reset switch                J10      Serial port 1               P5

  Turbo LED                   J11      Serial port 2               P6

  Power LED & keylock         J12      Floppy interface            P7

  Speaker                     J15      IDE interface               P8

                        USER CONFIGURABLE SETTINGS

             Function                  Jumper/Switch         Position

     DRAM address sequence                 J2            pins 1 & 2, 3 &
      select bank 1, then bank 2                             4 closed

      DRAM address sequence                 J2            pins 2 & 3, 4 &
      select bank 2, then bank 1                             5 closed

     Serial port 2 select IRQ3             J3              pins 2 & 3
                                                              closed

      Serial port 2 select IRQ4             J3              pins 1 & 2
                                                              closed

     Serial port 1 select IRQ3             J4              pins 2 & 3
                                                              closed

      Serial port 1) select IRQ4            J4              pins 1 & 2
                                                              closed

     Factory configured - do not           J5              pins 1 & 2
      alter                                                   closed

     On board battery enabled              J6                Closed

      On board battery disabled             J6                 Open

     Parallel port select IRQ7             J8              pins 2 & 3
                                                              closed

      Parallel port select IRQ5             J8              pins 1 & 2
                                                              closed

     Power good signal detect              J9              pins 2 & 3
      from power supply                                       closed

      Power good signal detect              J9              pins 1 & 2
      from board                                              closed

     Factory configured - do not           J13             pins 2 & 3
      alter                                                   closed

     Factory configured - do not           J14             pins 1 & 2
      alter                                                   closed

     CMOS memory normal                    J17                Open
      operation

      CMOS memory clear                     J17               Closed

     Factory configured - do not           J18                Open
      alter

     Factory configured - do not          SW1/1               Off
      alter

      Monitor type select color            SW1/2                On

      Monitor type select                  SW1/2               Off
      monochrome

      Note : Cache is factory installed and is not configurable. The size
      of the cache & tag chips are unidentified.

              DRAM CONFIGURATION

      Size          Bank 1          Bank 2

      1MB         (4) 256K x 9       NONE

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

      4MB         (4) 1M x 9         NONE

      5MB         (4) 1M x 9     (4) 256K x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

