
PACKARD BELL

486 MODEL 3X3 SERIES, 4X4 SERIES

Device Type        Mainboard
Processor          80486SX/80486SX2/80486DX/80486DX2/P24T
Processor Speed    25/33/50(internal)/66(internal)MHz
Chip Set           OPTI
Video Chip Set     Cirrus Logic
Maximum Onboard    64MB
Memory
Maximum Video      Unidentified
Memory
Cache              128/512KB
BIOS               Phoenix
Dimensions         254mm x 218mm
I/O Options        32-bit VESA local bus slot, floppy drive interface, IDE
                   interfaces (2), parallel port, PS/2 mouse port, serial
                   ports (2), VGA feature connector, VGA port, riser slot
NPU Options        None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  PS/2 mouse port             J2       IDE interface              J23

  VGA port                    J3       IDE interface              J24

  Parallel port               J5       Front panel connector      J34

  Serial port 1               J6       Keylock                    J35

  VGA feature connector      J14       Chassis fan power          J38

  Floppy drive               J21       Riser slot                 SL1
  interface

  Modem connector            J22       32-bit VESA local bus      SL2
                                       slot

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not           J4           Unidentified
      alter

     Monitor type select color             J8              Closed

      Monitor type select monochrome        J8               Open

     VGA IRQ9 disabled                     J9               Open

      VGA IRQ9 enabled                      J9              Closed

     Factory configured - do not           J10          Unidentified
      alter

     Factory configured - do not           J11          Unidentified
      alter

     Boot block normal operation           J17        Pins 2 & 3 closed

      Boot block enabled                    J17        Pins 1 & 2 closed

     Parity disabled                       J18        Pins 2 & 3 closed

      Parity enabled                        J18        Pins 1 & 2 closed

     On board video enabled                J19        Pins 2 & 3 closed

      On board video disabled               J19        Pins 1 & 2 closed

     On board I/O enabled                  J20        Pins 2 & 3 closed

      On board I/O disabled                 J20        Pins 1 & 2 closed

     Factory configured - do not           J29          Unidentified
      alter

     On board speaker enabled              J30        Pins 3 & 4 closed

      On board speaker disabled             J30              Open

     LDEV# enabled                         J33             Closed

      LDEV# disabled                        J33              Open

     Speaker enabled                       J36        Pins 3 & 4 closed

      Speaker disabled                      J36              Open

     Factory configured - do not           J39              Open
      alter

     Factory configured - do not           J40          Unidentified
      alter

     Factory configured - do not           J41          Unidentified
      alter

                            SIMM CONFIGURATION

       Size             Bank 0             Bank 1             Bank 2

       1MB           (1) 256K x 36          None                4MB

       2MB           (1) 512K x 36          None                4MB

       2MB           (1) 256K x 36      (1) 256K x 36           4MB

       3MB           (1) 512K x 36      (1) 256K x 36           4MB

       4MB            (1) 1M x 36           None                4MB

       4MB           (1) 512K x 36      (1) 512K x 36           4MB

       5MB            (1) 1M x 36       (1) 256K x 36           4MB

       6MB            (1) 1M x 36       (1) 512K x 36           4MB

       8MB            (1) 2M x 36           None                4MB

       8MB            (1) 1M x 36        (1) 1M x 36            4MB

       9MB            (1) 2M x 36       (1) 256K x 36           4MB

       10MB           (1) 2M x 36       (1) 512K x 36           4MB

       12MB           (1) 2M x 36        (1) 1M x 36            4MB

       12MB           (1) 1M x 36        (1) 2M x 36            4MB

       16MB           (1) 4M x 36           None                4MB

       16MB           (1) 2M x 36        (1) 2M x 36            4MB

       17MB           (1) 4M x 36       (1) 256K x 36           4MB

       18MB           (1) 4M x 36       (1) 512K x 36           4MB

       20MB           (1) 4M x 36        (1) 1M x 36            4MB

       24MB           (1) 4M x 36        (1) 2M x 36            4MB

       32MB           (1) 8M x 36           None                4MB

       32MB           (1) 4M x 36        (1) 4M x 36            4MB

       33MB           (1) 8M x 36       (1) 256K x 36           4MB

       34MB           (1) 8M x 36       (1) 512K x 36           4MB

       36MB           (1) 8M x 36        (1) 1M x 36            4MB

       40MB           (1) 8M x 36        (1) 2M x 36            4MB

       48MB           (1) 8M x 36        (1) 4M x 36            4MB

       64MB           (1) 8M x 36        (1) 8M x 36            4MB

            Note: If J37 is set to enabled, add 4 MB to the size column
            to get correct memory size. If 64MB is installed, J37 must be
            disabled.

                       ON BOARD MEMORY CONFIGURATION

                 Setting                                J37

                  Enabled                             Open

                  Disabled                            Closed

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

     128KB        (4) 32K x 8        None        Unidentified

     512KB        (4) 64K x 8     (4) 64K x 8    Unidentified

               CACHE JUMPER CONFIGURATION

            Size                        J26

           128KB                       Open

           512KB             Pins 1 & 2, 3 & 4 closed

               VIDEO MEMORY CONFIGURATION

  Note: The size of the video memory is unidentified.

           CPU SPEED SELECTION

        Speed                J25

        25MHz         Pins 1 & 2 closed

        33MHz         Pins 2 & 3 closed

       50iMHz         Pins 1 & 2 closed

       66iMHz         Pins 2 & 3 closed

                   CPU TYPE SELECTION

            Type                        J31

          80486SX                Pins 5 & 6 closed

          80486SX2           Pins 1 & 2, 3 & 4 closed

          80486DX            Pins 1 & 2, 3 & 4 closed

          80486DX2           Pins 1 & 2, 3 & 4 closed

            P24T             Pins 1 & 2, 3 & 4 closed

            CPU TYPE SELECTION

        Type                 J28

     SL enhanced      Pins 1 & 2 closed

   Non SL enhanced    Pins 2 & 3 closed

        P24T          Pins 1 & 2 closed

                           CPU VOLTAGE SELECTION

               Voltage                                 J32

                   3.3v                     Pins 1 & 3, 2 & 4 closed

                   5v                      Pins 3 & 5, 4 & 6 closed

                           DMA CHANNEL SELECTION

         Channel                   J15                      J16

             1             Pins 1 & 2 closed        Pins 1 & 2 closed

              3             Pins 2 & 3 closed        Pins 2 & 3 closed

