
PACKARD BELL

PB410 & PB420/420T (REVISION C)

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        Propriatary 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               J17             pins 2 & 3
      boot 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 implimented 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 & parity 0 are 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                 J29             J34              J40

         80486SX             Closed         pins 5 & 6       pins 3 & 4
                                             closed            closed

         80487SX             Closed         pins 3 & 4      pins 1 & 2, 5
                                             closed          & 6 closed

         80486DX             Closed       pins 1 & 2, 5     pins 1 & 2, 5
                                           & 6 closed        & 6 closed

     ODPR486SX-25MHz          Open        pins 1 & 2, 5     pins 1 & 2, 5
                                           & 6 closed        & 6 closed

     ODP486SX-33MHz           Open          pins 3 & 4      pins 1 & 2, 5
                                             closed          & 6 closed

        80486DX2              Open        pins 1 & 2, 5     pins 1 & 2, 5
                                           & 6 closed        & 6 closed

                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

