OLIVETTI

M280

Processor         80286
Processor Speed   12MHz
Chip Set          Unidentified
Max. Onboard DRAM 1MB
Cache             None
BIOS              Unidentified
Dimensions        355mm x 304mm
I/O Options       Floppy drive interface, parallel port, serial port
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  Parallel port              CN1      Floppy drive interface       CN3

  Serial port                CN2

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

  »   Memory size select 1MB               JU1 pins 1 &        Open
                                                9

      Memory size select 512KB             JU1 pins 1 &       Closed
                                                9

  »   Parallel port enabled                JU1 pins 6 &       Closed
                                                14

      Parallel port disabled               JU1 pins 6 &        Open
                                                14

  »   Serial port enabled                  JU1 pins 7 &       Closed
                                                15

      Serial port disabled                 JU1 pins 7 &        Open
                                                15

  »   Factory configured - do not alter    JU1 pins 8 &        Open
                                                16

  »   System clock source select 24MHz     JU2 pins 7 &        Open
      on board clock                            15

      System clock source select           JU2 pins 7 &       Closed
      external clock                            15

  »   NPU wait state select 3 wait         JU2 pins 8 &       Closed
      states                                    16

      NPU wait state select 10 wait        JU2 pins 8 &        Open
      states                                    16

  »   Burn in enabled                      JU3 pins 1 &        Open
                                                5

      Burn in disabled                     JU3 pins 1 &       Closed
                                                5

  »   Monitor type select color/Olivetti   JU3 pins 2 &       Closed
      monochrome                                6

      Monitor type select monochrome       JU3 pins 2 &        Open
                                                6

  »   32KHz clock enabled                  JU3 pins 3 &       Closed
                                                7

      32KHz clock disabled                 JU3 pins 3 &        Open
                                                7

  »   Factory configured - do not alter    JU3 pins 4 &        Open
                                                8

  »   14MHz clock enabled                      JU4            Closed

      14MHz clock disabled                     JU4             Open

  »   1.8MHz clock enabled                     JU5            Closed

      1.8MHz clock disabled                    JU5             Open

  »   Factory configured - do not alter        JU8            Closed

  »   Factory configured - do not alter        JU9            Closed

  Note: The locations of JU4, JU5, JU8 & JU9 are unidentified.

           DRAM CONFIGURATION

     Size        Bank 0        Bank 1

    512KB       (18) 41256      NONE

     1MB        (18) 41256   (18) 41256

                CPU SPEED CONFIGURATION

      Speed               JU6                JU7

       8MHz               Open             Closed

      12MHz              Closed             Open

  Note: The locations of JU6 & JU7 aare unidentified.

                          NPU SPEED CONFIGURATION

    Speed      JU2 pins 1 &   JU2 pins 2 &   JU2 pins 3 &    JU2 pins 4 &
                    9              10             11             12

     8MHz          Open           Open           Open           Open

    12MHz         Closed         Closed         Closed         Closed

                NPU SPEED CONFIGURATION (CON’T)

     Speed            JU10            JU11            JU12

      8MHz            Open            Open            Open

     12MHz           Closed          Closed          Closed

  Note: The locations of JU10, JU11 & JU12 aare unidentified.

                            BIOS CONFIGURATION

     Type      JU1 pins 2 &   JU1 pins 3 &   JU1 pins 4 &    JU1 pins 5 &
                    10             11             12             13

    27128         Closed          Open          Closed          Open

    27256          Open          Closed          Open          Closed

               SCROLL MODE CONFIGURATION

      Setting        JU2 pins 5 & 13   JU2 pins 6 & 14

    Fast scroll           Open               Open

  Flicker scroll         Closed             Closed