
PACKARD BELL

PB450, LEGEND-CD 486SX

Processor  80486SX/SL80486SX/80486DX/SL80486DX/80486DX2/SL80486DX2/80486DX4/P24T
Processor  25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   OPTI
Video Chip Cirrus Logic
Set
Maximum    64MB
Onboard
Memory
Maximum    2MB
Video
Memory
Cache      128/512KB
BIOS       Unidentified
Dimensions 254mm x 218mm
I/O        Floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse
Options    port, serial ports (2), VESA feature connector, VGA port, riser slot
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  PS/2 mouse port            J2        IDE interface 1            J24

  VGA port                   J3        External battery           J30

  Parallel port              J5        Front panel                J34
                                       connector

  Serial port 1              J6        Power LED & keylock        J35

  VESA feature               J14       Speaker                    J36
  connector

  Floppy drive               J21       Chassis fan power          J38
  interface

  Serial port 2/modem        J22       Riser slot                 SL1
  connector

  IDE interface 2            J23

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Monitor type select color             J8              Closed

      Monitor type select monochrome        J8               Open

     Video IRQ9 disabled                   J9               Open

      Video IRQ9 enabled                    J9              Closed

     Factory configured - do not           J10          Unidentified
      alter

     Factory configured - do not           J11          Unidentified
      alter

     Flash BIOS normal operation           J17        Pins 2 & 3 closed

      Flash BIOS boot block enabled         J17        Pins 1 & 2 closed

     DRAM parity disabled                  J18        Pins 2 & 3 closed

      DRAM 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

      Battery type select internal          J30        Pins 3 & 4 closed

      Battery type select external          J30             Closed

     LDEV# bypass enabled                  J33             Closed

      LDEV# bypass disabled (PCI            J33              Open
      card present)

      Speaker type select internal          J36        Pins 3 & 4 closed

      Speaker type select external          J36             Closed

     On board memory enabled               J37              Open

      On board memory disabled              J37             Closed

                        DRAM CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

       4MB             4MB              None            None

       5MB             4MB         (1) 256K x 36        None

       6MB             4MB         (1) 256K x 36    (1) 256K x 36

       6MB             4MB         (1) 512K x 36        None

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

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

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

      12MB             4MB          (1) 2M x 36         None

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

      20MB             4MB          (1) 2M x 36      (1) 2M x 36

      20MB             4MB          (1) 4M x 36         None

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

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

      28MB             4MB          (1) 2M x 36      (1) 4M x 36

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

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

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

      52MB             4MB          (1) 8M x 36      (1) 4M x 36

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

  Note: If 64MB is installed, J37 must be closed.

                      CACHE CONFIGURATION

      Size          Bank 0           TAG0            TAG1

     128KB        (4) 32K x 8     (1) 32K x 8    (1) 64K x 1

     512KB       (4) 128K x 8     (1) 32K x 8    (1) 64K x 1

               CACHE JUMPER CONFIGURATION

            Size                        J26

           128KB                       Open

           512KB             Pins 1 & 2, 3 & 4 closed

    VIDEO MEMORY CONFIGURATION

      Size            Bank 0

       2MB        (2) 256K x 16

           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

       75iMHz         Pins 1 & 2 closed

       100iMHz        Pins 2 & 3 closed

                            CPU TYPE SELECTION

           Type                      J28                     J31

          80486SX             Pins 2 & 3 closed       Pins 5 & 6 closed

         SL80486SX            Pins 1 & 2 closed       Pins 1 & 2, 3 & 4
                                                           closed

          80486DX             Pins 2 & 3 closed       Pins 1 & 2, 3 & 4
                                                           closed

         SL80486DX            Pins 1 & 2 closed       Pins 1 & 2, 3 & 4
                                                           closed

         80486DX2             Pins 2 & 3 closed       Pins 1 & 2, 3 & 4
                                                           closed

        SL80486DX2            Pins 1 & 2 closed       Pins 1 & 2, 3 & 4
                                                           closed

         80486DX4             Pins 2 & 3 closed       Pins 1 & 2, 3 & 4
                                                           closed

           P24T               Pins 1 & 2 closed       Pins 1 & 2, 3 & 4
                                                           closed

  CPU MULTIPLIER SELECTION (80486DX4 ONLY)

      Multiplier                J29

          2x             Pins 2 & 3 closed

          3x                   Open

                 CPU VOLTAGE SELECTION

          Voltage                       J32

            3.3v             Pins 1 & 3, 2 & 4 closed

             5v              Pins 3 & 5, 4 & 5 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

