
ZENITH DATA SYSTEMS

Z-248/12

Processor              80286
Processor Speed        12MHz
Chip Set               Unidentified
Video Chip Set         None
Maximum Onboard Memory 6MB
Maximum Video Memory   None
Cache                  None
BIOS                   Unidentified
Dimensions             355mm x 304mm
I/O Options            None
NPU Options            80287

[Image]

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not          J101          Unidentified
      alter

     NPU clock mode select /3             J103             Closed

      NPU clock mode select direct         J103              Open

     Factory configured - do not          J106          Unidentified
      alter

     Factory configured - do not          J113        Pins 1 & 2 closed
      alter

     Speaker enabled                      J114             Closed

      Speaker disabled                     J114              Open

     Chip at U-169 is Poach 7             J115        Pins 1 & 2 closed

      Chip at U-169 is Poach 1             J115        Pins 2 & 3 closed

     Factory configured - do not          J116        Pins 2 & 3 closed
      alter

                      DRAM CONFIGURATION

      Size          Bank 0          Bank 1          Bank 2

      1MB        (2) 256K x 9    (2) 256K x 9        None

      3MB        (2) 256K x 9    (2) 256K x 9     (2) 1M x 9

      6MB         (2) 1M x 9      (2) 1M x 9      (2) 1M x 9

        DRAM JUMPER CONFIGURATION

        Size                 J102

         1MB          Pins 2 & 3 closed

         3MB          Pins 2 & 3 closed

         6MB          Pins 1 & 2 closed

                        NPU SPEED SELECTION

         Speed                  Type                   P113

         6MHz                  80287           Pins 13 & 14 closed

         8MHz                  80C87           Pins 13 & 14 closed

         8MHz                  80287            Pins 7 & 8 closed

         12MHz                 80C87            Pins 7 & 8 closed

