COVOX INC.

SOUND MASTER II

Card Type              Sound Card
Chipset/Controller     YM3812
I/O Options            Line in (2), microphone jack, MIDI port, volume
                       control
Maximum DRAM           N/A

[Image]

                               CONNECTIONS

         Purpose           Location          Purpose           Location

  Volume control              CN1      PC speaker connector      CN4

  Speaker jack                CN2      Microphone jack            M1

  Game/MIDI port              CN3      Line in 2                  M2

                             INTERRUPT SELECT

     IRQ           J3          J4          J5          J6          J7

  »    IRQ7       Open        Open        Open        Open       Closed

       IRQ6       Open        Open        Open       Closed       Open

       IRQ5       Open        Open       Closed       Open        Open

       IRQ4       Open       Closed       Open        Open        Open

       IRQ3      Closed       Open        Open        Open        Open

                           MIDI INTERRUPT SELECT

       IRQ             J8            J9            J10           J11

  »      IRQ2        Closed         Open          Open           Open

         IRQ3         Open         Closed         Open           Open

         IRQ5         Open          Open         Closed          Open

         IRQ7         Open          Open          Open          Closed

                            I/O ADDRESS SELECT

     Address          J12            J13           J14           J15

  »      22Xh        Closed         Open          Open           Open

         24Xh         Open         Closed         Open           Open

         28Xh         Open          Open         Closed          Open

         2CXh         Open          Open          Open          Closed

                                DRQ SELECT

            DRQ                      J16                     J17

  »          DRQ1                   Open                   Closed

             DRQ3                  Closed                   Open

                                DACK SELECT

           DACK                      J18                     J19

  »          DACK1                   Open                  Closed

             DACK3                  Closed                  Open

                          FM PORT ADDRESS SELECT

               Address                                 J1

  »                388h                         Pins 1 & 2 closed

                   380h                         Pins 2 & 3 closed

                         MIDI PORT ADDRESS SELECT

               Address                                 J2

  »                330h                         Pins 1 & 2 closed

                   338h                         Pins 2 & 3 closed