AMERICAN MEGATRENDS, INC.

SERIES 68 ENTERPRISE-III

Processor              80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed        25/33/50(internal)/50/66(internal)MHz
Chip Set               AMI
Max. Onboard DRAM      256MB
Cache                  256KB (factory configured)
BIOS                   AMI
Dimensions             330mm x 307mm
I/O Options            32-bit VESA local bus slots (2), mouse port
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                 Location

  Turbo LED                    D5       Reset switch               J9

  Diagnostic LED               J1       Power LED & keylock       J10

  Mouse                        J3       Turbo switch              J14

  Speaker                      J8       32-bit VESA local       S1 & S2
                                        bus slots

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   CMOS memory normal operation            J2                Open

      CMOS memory clear                       J2               Closed

  »   CPU select low priority                J19             pins 1 & 2
                                                               closed

      CPU select high priority               J19             pins 2 & 3
                                                               closed

  »   Factory configured - do not            J20               Closed
      alter

  »   Factory configured - do not            J21               Closed
      alter

  »   Factory configured - do not            J24               Closed
      alter

  »   VESA bus select ID3 normal             J30             pins 1 & 2
      operation <=33MHz                                        closed

      VESA bus select remote ID3 >           J30             pins 2 & 3
      33MHz                                                    closed

  »   Factory configured - do not           SW1/1               Off
      alter

  »   Monitor type select                   SW1/2               Off
      monochrome

      Monitor type select color             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 TYPE CONFIGURATION

          Type                   Location                    J7

         80486SX                  Primary            pins 2 & 3 closed

        ODP486SX                  Upgrade             pins 1 & 2, 3 & 4
                                                           closed

         80487SX                  Upgrade             pins 1 & 2, 3 & 4
                                                           closed

         80486DX                  Primary             pins 1 & 2, 3 & 4
                                                           closed

        80486DX2                  Primary             pins 1 & 2, 3 & 4
                                                           closed