ADVANCED INTEGRATION RESEARCH, INC.

486EO-50/33/25/20 EISA

Processor        80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed  20/25/33/50/66(internal)MHz
Chip Set         OPTI
Max. Onboard     128MB
DRAM
Cache            64/128/256/512KB
BIOS             AMI/Phoenix
Dimensions       309mm x 331mm
I/O Options      32-bit external memory card slot, 32-bit external video
                 card slot
NPU Options      4167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Speaker                    J4        Turbo LED                   J8

  Power LED & Keylock        J5        32-bit external             S1
                                       memory card

  Reset switch               J6        32-bit external video      VP1
                                       card

  Turbo switch               J7

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not alter        JO3             Open

  »   Factory configured - do not alter        JO4             Open

  »   Monitor type select monochrome           JP6             Open

      Monitor type select color                JP6            Closed

                            DRAM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2         Bank 3

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

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

     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

     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

     28MB        (4) 1M x 9     (4) 1M x 9    (4) 4M x 9     (4) 1M x 9

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

     36MB        (4) 4M x 9     (4) 4M x 9    (4) 1M 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

     52MB        (4) 4M x 9     (4) 4M x 9    (4) 4M x 9     (4) 1M x 9

     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

  Note:Banks 2 & 3 are used when a 32-bit external memory card is
  installed at S1.

              CACHE CONFIGURATION

      Size          Bank 0          Bank 1

      64KB        (4) 8K x 8      (4) 8K x 8

     128KB        (4) 32K x 8        NONE

     256KB        (4) 32K x 8    (4) 32K x 8

     512KB        (4) 128K x 8       NONE

                        CACHE JUMPER CONFIGURATION

  Size     JP1       JP2      JP3       JP9      JP10      JP11     JP12

  64K     Open      Open      Open      Open     Open      Open     2 & 3

  128K   Closed     Open      Open     Closed    Open      Open     1 & 2

  256K   Closed    Closed     Open     Closed    Open     Closed    2 & 3

  512K   Closed    Closed    Closed    Closed   Closed    Closed    1 & 2

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

          Type                     JP7                      JP8

         80486SX            pins 2 & 3 closed               open

         80487SX           pins 1 & 2 and 3 & 4      pins 1 & 2 closed
                                  closed

         80486DX           pins 1 & 2 and 3 & 4      pins 2 & 3 closed
                                  closed

        ODP486SX           pins 1 & 2 and 3 & 4      pins 1 & 2 closed
                                  closed

        80486DX2           pins 1 & 2 and 3 & 4      pins 2 & 3 closed
                                  closed

                          CPU SPEED CONFIGURATION

  Speed      JO1      JO2      JP4       JP5      JP13     JP14     JP15

  20MHz     Open    Closed     Open      Open     2 & 3   Closed   2 & 3

  25MHz     Open     Open      Open      Open     2 & 3   Closed   1 & 2

  33MHz     Open    Closed     Open     Closed    2 & 3    Open    1 & 2

  50iMHz    Open     Open      Open      Open     2 & 3   Closed   1 & 2

  50MHz     Open     Open     Closed    Closed    1 & 2    Open    1 & 2

  66iMHz    Open    Closed     Open     Closed    2 & 3    Open    1 & 2