NORTHGATE COMPUTER SYSTEMS, INC.

ZXP EISA

Processor         80486DX/80486DX2
Processor Speed   33/50(internal)/50/66(internal)MHz
Chip Set          OPTI
Max. Onboard DRAM 128MB
Cache             64/128/256/512KB
BIOS              AMI/Phoenix
Dimensions        330mm x 218mm
I/O Options       External memory card, floppy drive interface, IDE
                  interface, parallel port, serial ports (2)
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Reset switch                P2       Serial port 2               P8

  Speaker                     P3       Parallel port               P9

  Power LED & keylock         P4       IDE interface               P10

  Turbo LED                   P5       Floppy drive interface      P11

  IDE interface LED           P6       External memory card        P15

  Serial port 1               P7

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not             J11              Open
      alter

  »   Factory configured - do not             J12              Open
      alter

  »   Factory configured - do not             J20              Open
      alter

  »   Factory configured - do not             J21              Open
      alter

  »   Monitor type select color                P1             Closed

      Monitor type select monochrome           P1              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) 4M x 9               (4) 1M 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

  Note: An external memory card is available, but actual sizes are not
  identified by the manufacturer.

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

      64KB        (4) 8K x 8      (4) 8K x 8     (1) 64K x 1

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

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

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

                        CACHE JUMPER CONFIGURATION

  Size      J1       J2       J3       J4        J5       J6        J8

  64KB     Open     Open     Open     Open      Open     Open    pins 2 &
                                                                 3 closed

  128KB    Open     Open     Closed   Open     Closed    Open    pins 1 &
                                                                 2 closed

  256KB    Open    Closed    Closed   Closed   Closed    Open    pins 2 &
                                                                 3 closed

  512KB   Closed   Closed    Closed   Closed   Closed   Closed   pins 1 &
                                                                 2 closed

                          CPU TYPE CONFIGURATION

           Type                       J9                     J10

        80486DX/DX2           pins 2 & 3 closed       pins 1 & 2, 3 & 4
                                                           closed

                          CPU SPEED CONFIGURATION

  Speed     J7     J13       J14     J15     J16      J17      J18   J19

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

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

  50MHz    Open    Open     Open     Open   Closed   Closed    2 &    2 &
                                                               3      3

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

  Note: Pins designated should be in the closed position.