OLIVETTI

M400-40 (PCB BA301)

Processor             80486SX/80487SX/80486DX
Processor Speed       25/33MHz
Chip Set              Unidentified
Maximum Onboard Memory52MB
Cache                 None
BIOS                  Unidentified
Dimensions            355mm x 305mm
I/O Options           Floppy drive interface, IDE interface, parallel
                      port, PS/2 mouse port, serial port, feature
                      connector, VGA port, riser slot, console connector
NPU Options           None

[Image]

                               CONNECTIONS

         Function           Label            Function            Label

  PS/2 mouse port            CN1      IDE interface               CN6

  Parallel port              CN2      Floppy drive interface      CN7

  Serial port                CN3      Console connector           CN8

  VGA port                   CN4      Riser slot                  SL1

  Feature connector          CN5

                        USER CONFIGURABLE SETTINGS

                 Setting                     Label           Position

  »   ROM BIOS enabled                        J11             Closed

      ROM BIOS disabled                       J11              Open

  »   Floppy drive oscillator enabled         J13             Closed

      Floppy drive oscillator disabled        J13              Open

  »   CMOS memory normal operation            J15              Open

      CMOS memory clear                       J15             Closed

  »   Hard drives installed 1                 J16             Closed

      Hard drives installed 2                 J16              Open

  »   Serial port enabled                    SW1/1              On

      Serial port disabled                   SW1/1             Off

  »   Factory configured - do not alter      SW1/2              On

  »   Floppy drive write enabled             SW1/3              On

      Floppy drive write disabled            SW1/3             Off

  »   Factory configured - do not alter      SW1/4              On

  Note: The location of pin 1 on SW1 is unidentified.

                                DRAM

    Size         Bank 0       Bank 1        Bank 2        Bank 3

     4MB          4MB          None          None          None

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

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

    16MB          4MB       (4) 1M x 9    (4) 1M x 9    (4) 1M x 9

    20MB          4MB       (4) 4M x 9       None          None

    24MB          4MB       (4) 1M x 9    (4) 4M x 9       None

    36MB          4MB       (4) 4M x 9    (4) 4M x 9       None

    40MB          4MB       (4) 1M x 9    (4) 4M x 9    (4) 4M x 9

    40MB          4MB       (4) 4M x 9    (4) 4M x 9    (4) 1M x 9

    40MB          4MB       (4) 4M x 9    (4) 1M x 9    (4) 4M x 9

    52MB          4MB       (4) 4M x 9    (4) 4M x 9    (4) 4M x 9

  Note: Bank 0 is factory installed and is not configurable.

                                 CPU TYPE

      Setting             J18               J19                J20

      80486SX             Open              Open            Pins 2 & 3
                                                             closed

      80487SX          Pins 2 & 3          Closed           Pins 1 & 2
                         closed                              closed

      80486DX          Pins 1 & 2          Closed           Pins 1 & 2
                         closed                              closed

                    CPU SPEED

        Setting                    J21

         25MHz              Pins 2 & 3 closed

         33MHz              Pins 1 & 2 closed

  Note: The location of pin 1 is unidentified.

                        SERIAL PORT RING INDICATOR

               Setting                        J7                J8

  »      FAIL SAFE enabled (RS-232          Closed            Closed
            threshold voltage)

         FAIL SAFE disabled(RS-232           Open              Open
            threshold voltage)