ZENITH DATA SYSTEMS

Z-159

Processor              8088
Processor Speed        4.77/8MHz
Chip Set               Unidentified
Video Chip Set         None
Maximum Onboard Memory 1.2MB
Maximum Video Memory   None
Cache                  None
BIOS                   Unidentified
Dimensions             Unidentified
I/O Options            External memory card, CPU slot
NPU Options            8087

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Video slot                  SL1      Floppy drive slot           SL4

  Hard drive slot             SL2      Memory slot                 SL5

  CPU slot                    SL3

                                                                   [Image]

                CONNECTIONS

  Purpose                   Location

  Clock speed switch           CN1

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Floppy drives enabled                 SW101/0             Off

      Floppy drives disabled                SW101/0             On

      NPU not installed                     SW101/1             On

      NPU installed                         SW101/1             Off

      Memory wait state select 3 wait       SW101/2             Off
      states

      Memory wait state select 0 wait       SW101/2             On
      state

      Monitor ROM RAM protected             SW101/3             Off

      Monitor ROM RAM unprotected           SW101/3             On

  »   Factory configured - do not           SW102/0             On
      alter

      Video refresh rate select 50Hz        SW102/7             Off

      Video refresh rate select 60Hz        SW102/7             On

                   DRAM CONFIGURATION

  Note: The size of the memory chips is unidentified.

              DRAM JUMPER CONFIGURATION

   Size     SW102/1    SW102/2    SW102/3    SW102/4

   256KB      Off        Off        On         On

   320KB       On         On        Off        On

   384KB      Off         On        Off        On

   448KB       On        Off        Off        On

   512KB      Off        Off        Off        On

   576KB       On         On        On         Off

   640KB      Off         On        On         Off

        SYSTEM AUTO BOOT CONFIGURATION

    Setting         SW102/5        SW102/6

    Monitor           On              On

  Floppy drive        Off             On

   Hard drive         On             Off

                  FLOPPY DRIVE SELECTION

  Drives installed        SW101/6             SW101/7

         1                  On                  On

         2                  Off                 On

         3                  On                  Off

         4                  Off                 Off

                     MONITOR SELECTION

  Drives installed        SW101/4             SW101/5

        EGA                 On                  On

  Color (40 x 25)           Off                 On

  Color (80 x 25)           On                  Off

     Monochrome             Off                 Off

[Image]

           CONNECTIONS

  Purpose            Location

  Parallel port        CN1

                        USER CONFIGURABLE SETTINGS

               Function                      Label           Position

  »   EMS RAM has system RAM                SW401/1             Off

      EMS RAM only                          SW401/1             On

  »   Memory size select 640KB              SW401/2             Off

      Memory size select 512KB              SW401/2             On

  »   EMS RAM disabled                      SW401/3             On

      EMS RAM enabled                       SW401/3             Off

  »   EMS frame address select D0000        SW401/4             Off
      – DFFFF

      EMS frame address select E0000        SW401/4             On
      – EFFFF

  »   Parallel port IRQ7 enabled            SW401/7             On

      Parallel port IRQ7 disabled           SW401/7             Off

  »   EMS upgrade not installed            SW401/10             Off

      EMS upgrade installed                SW401/10             On

       EMC CARD SELECTION

   Card      SW401/5   SW401/6

     1         On        On

     2         On        Off

     3        Off        On

     4        Off        Off

              PARALLEL PORT ADDRESS SELECTION

      Setting             SW401/8             SW401/9

  LPT1 (378 - 37A)          Off                 On

  LPT2 (3BC – 3BE)          On                  Off

     278 – 27A              On                  On

      Disabled              Off                 Off