COMPAQ COMPUTER CORPORATION

SOUND BOARD

Card Type                 Sound card
Chipset Controller        Unidentified
I/O Options               Line in, Microphone in (2), volume control,
                          stereo speaker out (2), mono speaker out,
                          game/MIDI port, SCSI CD-ROM interface, CD-ROM
                          audio out, PC speaker in
Maximum Dram              N/A

[Image]

                                CONNECTIONS

        Purpose           Location           Purpose          Location

  Line in                    J1         Molex-D 4 audio          J6
                                        out

  Microphone in              J2         Right (mono)             J7
                                        speaker out

  Stereo speaker out         J3         Audio I/O (see           J8
                                        table below)

  Game/MIDI port             J4         PC Speaker in            J9

  SCSI CD-ROM                J5         Volume control           R1
  interface

                              CONNECTOR J8

        Purpose             Pin             Purpose             Pin

  Microphone in ground       1        Right speaker out          5

  Microphone in ground       2        Left speaker out           6

  Microphone in              3        Right speaker return       7

  Speaker out ground         4        Left speaker return        8

                  INTERNAL AUDIO AMPLIFIER CONFIGURATION

       » Left amp                Right amp                  JP5

        » Enabled                 Enabled             Pins 2 & 3, 5 & 6
                                                           closed

       » Disabled                Disabled             Pins 1 & 2, 4 & 5
                                                           closed

  BASE I/O ADDRESS FOR MIDI PORT SELECTION

      » Address                 JP4

        » 330h           Pins 1 & 2 closed

        » 300h            Pins 1 & 2 open

        BASE I/O ADDRESS FOR SOUND CARD SELECTION

          » Address                      JP6

           » 220h             Pins 7 & 8, 9 & 10 closed

           » 240h                 Pins 9 & 10 closed

           » 260h                 Pins 7 & 8 closed

           » 280h              Pins 7 & 8, 9 & 10 open

  BASE I/O ADDRESS FOR SCSI INTERFACE SELECTION

        » Address                   JP7

         » 340h                    Open

         » 140h                   Closed

  INTERRUPT FOR SCSI INTERFACE SELECTION

        » IRQ                 JP3

         » 9           Pins 1 & 2 closed

        » 10           Pins 3 & 4 closed

        » 11           Pins 5 & 6 closed

        » 12           Pins 7 & 8 closed

               INTERRUPT FOR SOUND CARD SELECTION

             » IRQ                            JP4

              » 2                Pins 11 & 12, 13 & 14 closed

              » 5                    Pins 13 & 14 closerd

              » 7                     Pins 11 & 12 closed

              » 10                Pins 11 & 12, 13 & 14 open

         GAME PORT CONFIGURATION

       » Port                JP6

      » Enabled       Pins 5 & 6 closed

     » Disabled        Pins 5 & 6 open

       8-BIT DMA CHANNEL FOR SOUND CARD SELECTION

         » Channel                      JP4

            » 0              Pins 3 & 4, 5 & 6 closed

            » 1                  Pins 5 & 6 closed

            » 3                  Pins 3 & 4 closed

       16-BIT DMA CHANNEL FOR SOUND CARD SELECTION

          » Channel                      JP4

             » 5              Pins 7 & 8, 9 & 10 closed

             » 6                  Pins 9 & 10 closed

             » 7                  Pins 7 & 8 closed

           DMA CHANNEL FOR SCSI INTERFACE SELECTION

      » Channel              JP1                  JP2

         » 0           Pins 1 & 2 closed   Pins 1 & 2 closed

         » 5           Pins 3 & 4 closed   Pins 3 & 4 closed

         » 6           Pins 5 & 6 closed   Pins 5 & 6 closed

         » 7           Pins 7 & 8 closed   Pins 7 & 8 closed