OCEAN INFORMATION SYSTEMS, INC.

DRAGON EISA 486

Processor         80486DX
Processor Speed   50MHz
Chip Set          OPTI
Max. onboard DRAM 128MB
SRAM Cache        64/128/256/512KB
BIOS              AMI
Dimensions        330mm x 215mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Speaker                     J4       Reset switch                S9

  Power LED & keylock         J5       CPU heatsink fan           JP22
                                       (+5VDC)

  Note:The location of JP22 is unknown and may be labeled JP17 on the
  board.

                        USER CONFIGURABLE SETTINGS

               Function                    Jumper           Position

  »   Factory configured - do not           JP1              Closed
      alter

  »   Factory configured - do not           JP2              Closed
      alter

  »   Factory configured - do not           JP3        pins 1 & 2 closed
      alter

  »   Monitor type select color             JP4              Closed

      Monitor type select monochrome        JP4               Open

  »   Factory configured - do not           JP6               Open
      alter

  »   Factory configured - do not           JP7        pins 1 & 2 and 3 &
      alter                                                 4 closed

  »   Factory configured - do not           JP8        pins 1 & 2 closed
      alter

  »   Factory configured - do not           JP9        pins 2 & 3 closed
      alter

             DRAM CONFIGURATION

  Size         Bank 0            Bank 1

   4MB       (4) 1M x 9           NONE

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

  16MB       (4) 4M x 9           NONE

  20MB       (4) 1M x 9        (4) 4M x 9

  32MB       (4) 4M x 9        (4) 4M x 9

  64MB      (4) 16M x 9           NONE

  128MB     (4) 16M x 9       (4) 16M x 9

                            SRAM CONFIGURATION

  Size     Bank 0    Bank 1     Dirty       TAG        TAG     TAG (U64)
                               (U49)      (U50)      (U51)

  64KB      (4) 8K   (4) 8K    (1) 16K   (1) 8K x     None      (1) 16K x
             x 8      x 8       x 1         8                  1 or 64K x
                                                                   1

  128KB    (4) 32K    NONE     (1) 16K   (1) 8K x     None      (1) 16K x
             x 8                x 1         8                  1 or 64K x
                                                                   1

  256KB    (4) 32K     (4)     (1) 16K   (1) 8K x   (1) 8K x    (1) 16K x
             x 8      32K x     x 1         8          8       1 or 64K x
                       8                                           1

  512KB      (4)      NONE     (1) 16K    (1) 32K     None      (1) 64K x
            128K x              x 1        x 8                     1
              8

                         SRAM JUMPER CONFIGURATION

   Jumper         64KB           128KB          256KB           512KB

     JP5        pins 2 & 3     pins 1 & 2     pins 2 & 3      pins 1 & 2
                 closed         closed          closed         closed

    JP10          Open           Open            Open          Closed

    JP11          Open           Open           Closed         Closed

    JP12          Open          Closed          Closed         Closed

    JP13          Open           Open           Closed         Closed

    JP14          Open          Closed          Closed         Closed

    JP15          Open           Open            Open          Closed