ZYTEX COMPUTERS, INC.

486-33/50 CACHE

Processor         80486DX
Processor Speed   33/50MHz
Chip Set          OPTI
Max. Onboard DRAM 64MB
Cache             64/128/256/512KB
BIOS              AMI
Dimensions        330mm x 266mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J3       Turbo LED                 JP13

  Power LED & keylock         J21       Turbo switch               SW1

  Speaker                     J22       Reset switch               SW2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                        JP1           pins 1 & 2
                                                              closed

  »   Bus speed select CLKI/4                  JP2             Open

      Bus speed select CLKI/6                  JP2            Closed

  »   Monitor type select monochrome           JP3             Open

      Monitor type select color                JP3            Closed

  »   CPU speed select iOSC                   JP12           pins 1 & 2
                                                              closed

      CPU speed select iOSC/2                 JP12           pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

     Size         Bank 0          Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9       NONE           NONE           NONE

     2MB        (4) 256K x 9   (4) 256K x 9       NONE           NONE

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

     5MB        (4) 256K x 9   (4) 1 M x 9        NONE           NONE

     6MB        (4) 256K x 9   (4) 256K x 9    (4) 1M x 9        NONE

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

     9MB        (4) 256K x 9    (4) 1M x 9     (4) 1M x 9        NONE

     10MB       (4) 256K x 9   (4) 256K x 9    (4) 1M x 9     (4) 1M x 9

     12MB       (4) 1M x 9      (4) 1M x 9     (4) 1M x 9        NONE

     13MB       (4) 256K x 9    (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     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) 1M x 9     (4) 4M 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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     64KB        (8) 8K x 8        NONE       (1) 8K x 8

     128KB       (8) 8K x 8     (8) 8K x 8    (1) 8K x 8

     256KB      (8) 32K x 8        NONE       (1) 32K x 8

     512KB      (8) 32K x 8    (8) 32K x 8    (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

   Size        JP7         JP8         JP9        JP10          JP11

   64KB        Open       Open        Open        Open        pins 2 & 3
                                                               closed

   128KB       Open       Open       Closed      Closed       pins 2 & 3
                                                               closed

   256KB       Open      Closed      Closed      Closed       pins 2 & 3
                                                               closed

   512KB      Closed     Closed      Closed      Closed       pins 1 & 2
                                                               closed

                          CPU TYPE CONFIGURATION

       Type               JP4               JP5                JP6

      80486SX            Open            pins 2 & 3            N/A
                                          closed

      80487SX           Closed           pins 1 & 2         pins 1 & 2
                                          closed             closed

      80486DX           Closed           pins 1 & 2         pins 2 & 3
                                          closed             closed