
INFOMATIC POWER SYSTEMS CORPORATION

486 EISA FULL SIZE

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   20/25/33/50/66(internal)MHz
Chip Set          OPTI
Max. Onboard DRAM 256MB
Cache             64/128/256/512KB
BIOS              AMI
Dimensions        355mm x 304mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Speaker                      J4       Turbo LED                  J7

  Power LED & keylock          J5       Reset switch               S9

  Turbo switch                 J6

                        USER CONFIGURABLE SETTINGS

                 Function                      Jumper         Position

     External BCLK buffering 80486DX           JP1          pins 1 & 2
      (33/50MHz)                                               closed

      External BCLK buffering                   JP1          pins 2 & 3
      80486SX/80487SX (20/25MHz)                               closed

     Cache bank select single                  JP2          pins 1 & 2
      (128/512KB)                                              closed

      Cache bank select double (64/256KB)       JP2          pins 2 & 3
                                                               closed

     Snooping/Flush 20MHz CPU                  JP8            Closed

      Snooping/Flush > 20MHz CPU                JP8             Open

     Monitor type select color                 JP9            Closed

      Monitor type select monochrome            JP9             Open

     CPU clock mode select single              JP12         pins 1 & 2
      frequency                                                closed

      CPU clock mode select double              JP12         pins 2 & 3
      frequency                                                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) 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

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

                          CPU TYPE CONFIGURATION

          Type                     JP10                     JP11

         80486SX            pins 1 & 2 & 3 & 4       pins 2 & 3 closed
                                  closed

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

         80486DX            pins 2 & 3 closed               Open

   EBC SPEED CONFIGURATION

  Speed      JP6      JP7

  20MHz     Open      Open

  25MHz     Open      Open

  33MHz     Open     Closed

  40MHz     Closed    Open

  50MHz     Closed   Closed

                            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

  Note:In order to configure your cache for 512K, your board needs to
  have been specifically ordered. The difference will be that bank 1 will
  be made up of (4) 32 pin DIP sockets, instead of (4) 28 pin DIP
  sockets.

                       CACHE TAG CHIP CONFIGURATION

    Size         JP3           JP4          JP5         U55        U56

    64KB         Open         Open          Open      (1) 8K x     N/A
                                                         8

   128KB        Closed        Open          Open      (1) 8K x     N/A
                                                         8

   256KB        Closed       Closed         Open      (1) 8K x    (1) 8K
                                                         8         x 8

   512KB        Closed       Closed        Closed      (1) 32K     N/A
                                                        x 8

                    CACHE DIRTY BIT CHIP CONFIGURATION

    Size          JP16           JP17           JP18          U72 & U54

    64KB          open           open           open         (2) 16K x 1
                                                             or (2) 64K x
                                                                  1

    128KB        closed          open           open         (2) 16K x 1
                                                             or (2) 64K x
                                                                  1

    256KB        closed         closed          open         (2) 16K x 1
                                                             or (2) 64K x
                                                                  1

    512KB        closed         closed         closed        (2) 64K x 1

                            CLOCK CONFIGURATION

        Type               JP13              JP14              JP15

    DS1287/1287A         pins 1 & 2        pins 1 & 2        pins 1 & 2
                          closed            closed            closed

     DS1387/1488         pins 2 & 3        pins 2 & 3        pins 2 & 3
                          closed            closed            closed

