
JOINDATA SYSTEMS, INC.

G486PE

Processor              80486SX/80486DX/80486DX2
Processor Speed        20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set               OPTI
Max. Onboard DRAM      32MB
Cache                  64/128/256/512KB
BIOS                   AMI
Dimensions             330mm x 218mm
I/O Options            None
NPU Options            4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Speaker                      J4       Reset switch               J9

  Power LED & keylock          J5

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     I/O bus speed select normal              JP1             Open

      I/O bus speed select slow                JP1            Closed

     Monitor type select monochrome           JP5             Open

      Monitor type select color                JP5            Closed

     Burst mode enabled                       JP7            Closed

      Burst mode disabled                      JP7             Open

           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

                            CACHE CONFIGURATION

    Size      Bank 0     Bank 1     TAG (U52)   TAG (U52)       Dirty
                                                              Bit(U66)

    64KB      4) 8K x    4) 8K x    (1) 8K x       N/A       (1) 16K x 1
                 8          8          8

   128KB      (4) 32K     NONE      (1) 8K x       N/A       (1) 16K x 1
                x 8                    8

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

   512KB      (4) 128K    NONE      (1) 32K x      N/A       (1) 64K x 1
                x 8                    8

  Note:You may use a (1) 64K x 1 at U66 for all Cache SRAM sizes .

                        CACHE JUMPER CONFIGURATION

  Size     JP6     JP11      JP12     JP13      JP14      JP15     JP16

  64KB      2 &    Open      Open     Open      Open      Open     Open
            3

  128KB     1 &    Open      Open    Closed     Open     Closed    Open
            2

  256KB     2 &    Open     Closed   Closed    Closed    Closed    Open
            3

  512KB     1 &   Closed    Closed   Closed    Closed    Closed    Closed
            2

  Note:Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

      Type         OSC1       JP2        JP3      JP8      JP9     JP10

  80486DX2- 50    50MHz      Closed    Closed    1 & 2,   2 & 3    1 & 2
      MHz                                        3 & 4

  80486DX2- 50    25MHz      Closed    Closed    1 & 2,   1 & 2    1 & 2
      MHz                                        3 & 4

   80486DX- 50    50MHz      Closed    Closed    1 & 2,   1 & 2    1 & 2
      MHz                                        3 & 4

   80486DX- 33    66MHz      Closed     Open     1 & 2,   2 & 3    1 & 2
      MHz                                        3 & 4

   80486DX- 33    33MHz      Closed     Open     1 & 2,   1 & 2    1 & 2
      MHz                                        3 & 4

   80486DX- 25    50MHz       Open      Open     1 & 2,   2 & 3    1 & 2
      MHz                                        3 & 4

   80486DX- 25    25MHz       Open      Open     1 & 2,   1 & 2    1 & 2
      MHz                                        3 & 4

   80486SX- 25    50MHz       Open      Open     2 & 3    2 & 3    Open
      MHz

   80486SX- 25    25MHz       Open      Open     2 & 3    1 & 2    Open
      MHz

   80486SX- 20    40MHz       Open      Open     2 & 3    2 & 3    Open
      MHz

   80486SX- 20    20MHz       Open      Open     2 & 3    1 & 2    Open
      MHz

  Note:Pins designated should be in the closed position.

