
OLIVETTI

M386/25 (BA247, BA255, BA263)

Processor                 80386DX
Processor Speed           25MHz
Chip Set                  Unidentified
Maximum Onboard Memory    18MB (8MB on external memory card)
Cache                     32KB
BIOS                      Unidentified
Dimensions                355mm x 305mm
I/O Options               External memory card, floppy drive interface, IDE
                          interface, parallel port, PS/2 mouse port, serial
                          port, VGA port
NPU Options               80387DX/3167

[Image]

                               CONNECTIONS

         Function           Label            Function            Label

  PS/2 mouse port            CN1      Floppy drive interface      CN5

  Parallel port              CN2      IDE interface               CN6

  Serial port                CN3      External memory card        SL1

  VGA port                   CN4

                        USER CONFIGURABLE SETTINGS

                 Setting                     Label           Position

     Factory configured - do not alter       J14             Closed

     CMOS memory normal operation            J27              Open

      CMOS memory clear                       J27             Closed

     Cache controller normal operation       J28              Open

      Cache controller using different        J28             Closed
      model that 82385

     NPU running at CPU speed                J30              Open

      NPU running at oscillator speed         J30             Closed

     BIOS EPROM enabled                      J32              Open

      BIOS EPROM disabled                     J32             Closed

                                   DRAM

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     2MB            1MB           1MB            None           None

     3MB            1MB           1MB        (4) 256K x 9       None

     4MB            1MB           1MB        (4) 256K x 9   (4) 256K x 9

     6MB            1MB           1MB         (4) 1M x 9        None

     7MB            1MB           1MB        (4) 256K x 9    (4) 1M x 9

     7MB            1MB           1MB         (4) 1M x 9    (4) 256K x 9

     10MB           1MB           1MB         (4) 1M x 9     (4) 1M x 9

                            CACHE SIZE

  Note: 32KB cache is factory installed and is not configurable.

                                SERIAL PORT

          Setting                    J11                     J12

     Normal operation                Open                   Open

      Indicated RS232               Closed                 Closed
      threshold level

