
AMERICAN MEGATRENDS, INC.

ENTERPRISE III (VERSION 2)

Processor        80486SX/80487SX/80486DX/ODP486SX/80486DX2/ODP586SX
Processor Speed  20/25/33/50(internal)/50/66(internal)
Chip Set         AMI
Max. Onboard DRAM256MB
Cache            256KB
BIOS             AMI
Dimensions       355mm x 304mm
I/O Options      32-bit VESA local bus slots (2), PS/2 mouse port (2)
NPU Options      NONE


[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Turbo LED                   D5       Power LED & keylock        J10

  Diagnostic LED              J1       Turbo switch               J14

  PS/2 mouse port             J3       10-pin PS/2 mouse          J100
                                       connector

  Speaker                     J8       32-bit VESA Local bus       S1
                                       slot

  Reset switch                J9       32-bit VESA Local bus       S2
                                       slot

                        USER CONFIGURABLE SETTINGS

              Function                 Jumper/Switch         Position

     Flash BIOS disabled                    J2                Open

      Flash BIOS enabled                     J2               Closed

     CPU type select 80486DX                J7           Pins 1 & 2, 3 &
                                                             4 closed

      CPU type select 80486SX                J7              Pins 2 & 3
                                                              closed

     PS/2 mouse enabled                    J12              Pins 1 & 2
                                                              closed

      PS/2 mouse disabled                   J12              Pins 2 & 3
                                                              closed

     CPU priority select low               J19              Pins 1 & 2
                                                              closed

      CPU priority select high              J19              Pins 2 & 3
                                                              closed

     Local bus ID >=33MHz                  J30              Pins 1 & 2
                                                              closed

      Local bus ID <=33MHz                  J30              Pins 2 & 3
                                                              closed

     Factory configured - do not          SW1/1                Off
      alter

      Monitor type select                  SW1/2                Off
      monochrome

      Monitor type select CGA              SW1/2                On

                            DRAM CONFIGURATION

     Size          Bank 0          Bank 1        Bank 2         Bank 3

      1MB        (4) 256K x 9       NONE          NONE           NONE

      2MB        (4) 256K x 9   (4) 256K x 9      NONE           NONE

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

      6MB        (4) 256K x 9   (4) 256K x 9   (4) 1M x 9        NONE

      8MB        (4) 1M x 9      (4) 1M x 9       NONE           NONE

     10MB        (4) 256K x 9   (4) 256K x 9   (4) 1M x 9     (4) 1M x 9

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

     16MB        (4) 1M x 9      (4) 1M x 9    (4) 1M x 9     (4) 1M x 9

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

     18MB        (4) 256K x 9   (4) 256K x 9   (4) 4M x 9        NONE

     20MB        (4) 1M x 9      (4) 4M x 9       NONE           NONE

     24MB        (4) 1M x 9      (4) 1M x 9    (4) 4M x 9        NONE

     32MB        (4) 4M x 9      (4) 4M x 9       NONE           NONE

     36MB        (4) 1M x 9      (4) 4M x 9    (4) 4M x 9        NONE

     40MB        (4) 1M x 9      (4) 1M x 9    (4) 4M x 9     (4) 4M x 9

     48MB        (4) 4M x 9      (4) 4M x 9    (4) 4M x 9        NONE

     64MB        (4) 4M x 9      (4) 4M x 9    (4) 4M x 9     (4) 4M x 9

     64MB        (4) 16M x 9        NONE          NONE           NONE

     128MB       (4) 16M x 9    (4) 16M x 9       NONE           NONE

     192MB       (4) 16M x 9    (4) 16M x 9    (4) 16M x 9       NONE

     256MB       (4) 16M x 9    (4) 16M x 9    (4) 16M x 9   (4) 16M x 9

             CPU SPEED SELECT

   Speed      J20        J21        J24

   20MHz     Closed      Open      Open

   25MHz      Open       Open      Open

   33MHz      Open       Open      Open

  50I Mhz     Open       Open      Open

   50MHz      Open       Open      Open

  66I MHz     Open       Open      Open

