OLIVETTI

M4-4X/M4-6X/PCS4XX (BA204X)

Processor          80486SX/80487SX/80486DX/80486DX2
Processor Speed    25/33/50(internal)/66(internal)MHz
Chip Set           Unidentified
Maximum Onboard    36MB
Memory
Cache              None
BIOS               Unidentified
Dimensions         254mm x 218mm
I/O Options        Floppy drive interfaces (2), IDE interface, parallel
                   port, PS/2 mouse port, serial ports (2), VGA port,
                   riser slot, CD-ROM connector
NPU Options        None

[Image]

                                CONNECTIONS

       Function            Label             Function            Label

  PS/2 mouse port           CN1       CD -ROM connector           CN6

  Parallel port             CN2       IDE interface               CN7

  Serial port 2             CN3       Floppy drive interface      CN8

  Serial port 1             CN4       Floppy drive interface      CN9

  VGA port                  CN5       Riser slot                  SL1

                        USER CONFIGURABLE SETTINGS

                 Setting                     Label           Position

  »   Factory configured - do not alter        F1              N/A

      Hard drives installed 1                  J2             Closed

      Hard drives installed 2                  J2              Open

  »   Setup access disabled                   J12           Pins 2 & 3
                                                              closed

      Setup access enabled                    J12           Pins 1 & 2
                                                              closed

  »   Mouse IRQ12 enabled                     J13           Pins 2 & 3
                                                              closed

      Mouse IRQ12 disabled                    J13           Pins 1 & 2
                                                              closed

  »   Serial port 1 bootstrap enabled         J21           Pins 2 & 3
                                                              closed

      Serial port 1 bootstrap disabled        J21           Pins 1 & 2
                                                              closed

  »   Serial port 2 bootstrap enabled         J25           Pins 2 & 3
                                                              closed

      Serial port 2 bootstrap disabled        J25           Pins 1 & 2
                                                              closed

  »   Floppy drives not write protected       J33           Pins 2 & 3
                                                              closed

      Floppy drives write protected           J33           Pins 1 & 2
                                                              closed

  »   Factory configured - do not alter       J45              N/A

                              DRAM

        Size                Bank 0                Bank 1

         4MB                  4MB                  None

         8MB                  4MB              (1) 1M x 36

        12MB                  4MB              (1) 2M x 36

        20MB                  4MB              (1) 4M x 36

        36MB                  4MB              (1) 8M x 36

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

                                 CPU TYPE

          Setting                    J28                     J29

      80486SX (PQFP)          Pins 1 & 2 closed       Pins 1 & 2 closed

  80486SX (PQFP)/80487SX      Pins 1 & 2 closed       Pins 1 & 2 closed

  80486SX (PQFP)/80486DX2     Pins 1 & 2 closed       Pins 1 & 2 closed

       80486SX (PGA)          Pins 2 & 3 closed       Pins 1 & 2 closed

          80487SX             Pins 1 & 2 closed       Pins 1 & 2 closed

          80486DX             Pins 1 & 2 closed       Pins 2 & 3 closed

         80486DX2             Pins 1 & 2 closed       Pins 2 & 3 closed

      CPU SPEED

  Setting     J44

   25MHz     Closed

   33MHz      Open

  50iMHz     Closed

  66iMHz      Open

                               VIDEO MEMORY

          Size                    Bank 0                   Bank 1

          512KB                   512KB                     None

           1MB                    512KB                    512KB

  Note: Bank 0 is factory installed and is not configurable. The chip
  sizes are unidentified.

       MISCELLANEOUS TECHNICAL NOTE

  The location of pin 1 is unidentified.