
PACKARD BELL

PB410 & PB420/420T (REVISION B)

Processor       80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 20/25/33/40/50(internal)/66(internal)MHz
Chip Set        ACC
Max. onboard    36MB
DRAM
SRAM Cache      32/128/512KB
BIOS            Phoenix
Dimensions      330mm x 240mm
I/O Options     Fax/modem daughterboard, floppy drive interface, game
                port, IDE interface, multi-function connector (IDE
                interface LED, reset, keylock, turbo switch, turbo-LED,
                non-turbo LED), parallel port, PS/2 keyboard port, PS/2
                mouse port, serial port, VGA port, video feature connector
NPU Options     None

[Image]

                                CONNECTIONS

  Purpose               Location     Purpose                   Location

  PS/2 keyboard            J1        Floppy drive interface       J19

  PS/2 mouse               J2        Proprietary fax/modem        J21
                                     daughterboard

  VGA port                 J3        External battery             J28

  Game port                J4        External fan power           J35
                                     (+12V DC)

  Parallel port            J5        Multi-function               J36
                                     connector

  Serial port              J6        Keylock                      J37

  Video feature            J10       Speaker                      J38
  connector

  Audio interface          J14       Riser card                   S1
  connector (unused)

  IDE interface            J18

                        USER CONFIGURABLE SETTINGS

              Function                   Jumper/Switch        Position

     Onboard Game port enabled               J15              Closed

      Onboard Game port disabled              J15               Open

     PS/2 mouse port enabled                 J27              Closed
      (IRQ12)

      PS/2 mouse port disabled                J27               Open

     Monitor type select color               J12              Closed

      Monitor type select                     J12               Open
      monochrome

     Onboard I/O ports enabled               J16              Closed

      Onboard I/O ports disabled              J16               Open

     Hard drive boot from DOS boot           J17            pins 2 & 3
      block                                                    closed

      Hard drive boot from custom             J17            pins 1 & 2
      boot block                                               closed

     Flash BIOS write protect                J20               Open
      enabled

      Flash BIOS write protect                J20              Closed
      disabled

     Onboard battery enabled                 J24              Closed

      Onboard battery disabled                J24               Open

     Speaker select internal                 J39            pins 1 & 2
                                                               closed

      Speaker select external                 J39            pins 2 & 3
                                                               closed

  Note: Parallel port, serial port, floppy drive interface, and IDE
  interface are configured through the BIOS setup options. J20 is only a
  trace, and has not been implemented in any production models of the
  board.

  DRAM CONFIGURATION (NO MEMORY SOLDERED TO BOARD)

           Size                     Bank 0

           2MB                   (1) 512K x 36

           4MB                    (1) 1M x 36

           8MB                    (1) 2M x 36

           16MB                   (1) 4M x 36

           32MB                   (1) 8M x 36

       DRAM CONFIGURATION (4MB OF MEMORY SOLDERED TO BOARD)

      Size            Bank 0       Parity 0 (P0)       Bank 1

       4MB          (8) 441000       (1) 441000         NONE

       6MB          (8) 441000       (1) 441000     (1) 512K x 36

       8MB          (8) 441000       (1) 441000      (1) 1M x 36

      12MB          (8) 441000       (1) 441000      (1) 2M x 36

      20MB          (8) 441000       (1) 441000      (1) 4M x 36

      36MB          (8) 441000       (1) 441000      (1) 8M x 36

  Note:Bank 0 is soldered to the board.

                        ONBOARD VIDEO CONFIGURATION

     Onboard Video            IRQ              J11              J22

          Enabled            IRQ9          pins 2 & 3         Closed
                                             closed

           Enabled            None          pins 2 & 3          Open
                                             closed

          Disabled            N/A           pins 1 & 2          N/A
                                             closed

                            VRAM CONFIGURATION

         Size           Bank 0 (U23)      Bank 1 (U20)     Bank 1 (U22)

        512KB           (1) 256K x 16         NONE             NONE
                             DIP

      1MB factory       (1) 256K x 16         NONE         (1) 256K x 16
      installed              DIP                                DIP

  1MB user installed    (1) 256K x 16     (1) 256K x 16        NONE
                             DIP              ZIP

  Note:If board is factory installed with 1MB of VRAM, a second 256K x 16
  DIP will soldered on the board at U22. If board is factory configured
  with 512KB of VRAM, U22 will only be a trace, and a 40-pin ZIP socket
  will be installed at location U20. If the ZIP socket is present, there
  will also be traces for 2 additional zip sockets at U14 and U16.
  Sockets installed on ZIP socket traces will not function.

                      PARALLEL PORT IRQ CONFIGURATION

                  IRQ                                  J13

                   IRQ7                        pins 1 & 2 closed

                    IRQ5                        pins 2 & 3 closed

                          CPU TYPE CONFIGURATION

          CPU             Type       Location         J29          J34

        80486SX           PQFP          U47           Open       pins 1 &
                                                                3, 2 & 4

        80487SX            PGA          U45           Open       pins 1 &
                                                                3, 2 & 4

        80486DX            PGA          U45           Open       pins 3 &
                                                                5, 4 & 6

    ODPR486SX-25MHz        PGA          U45          Closed      pins 3 &
                                                                5, 4 & 6

     ODP486SX-33MHz        PGA          U45          Closed      pins 1 &
                                                                3, 4 & 6

        80486DX2           PGA          U45          Closed      pins 3 &
                                                                5, 4 & 6

  Note:Pins designated should be in the closed position.

                CPU SPEED CONFIGURATION

    Speed          J23           J25          J26

    20MHz        Closed         Open          Open

  25/50i MHz      Open         Closed        Closed

  33/66i MHz      Open         Closed         Open

    40MHz         Open          Open         Closed

                            CACHE CONFIGURATION

            Size                     Cache                   TAG

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

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

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

                        CACHE JUMPER CONFIGURATION

      Size            J30           J31            J32            J33

        32KB         Open       pins 1 & 2     pins 1 & 2     pins 1 & 2
                                   closed        closed         closed

        128KB        Closed      pins 2 & 3     pins 2 & 3     pins 1 & 2
                                   closed        closed         closed

        512KB        Closed      pins 2 & 3     pins 2 & 3     pins 2 & 3
                                   closed        closed         closed

