MECER CORPORATION

B-301 (REV. B)

Card Type                  Sound card
Chipset Controller         ES488
I/O Options                CD audio in, CD-ROM interface (2), line in, line
                           out, microphone in (2), speaker out, volume
Maximum DRAM               N/A

[Image]

                                CONNECTIONS

       Purpose            Location          Purpose           Location

  Speaker out                J1        Mistumi CD-ROM           JP105
                                       interface

  Microphone in              J2        CD audio in              JP109

  Line in                    J3        External control         JP110
                                       (see table below)

  Panasonic CD-ROM           J7        Sound output             JP112
  interface                            (left)

  External microphone      JP101       Volume                    VR
  in

  Sound output             JP102

              EXTERNAL CONTROL CONNECTION/ JP110

            Purpose                       Location

  Active low/read, port 201h               Pin 1

  External microphone in                   Pin 2

  Active low/write, port 201h              Pin 3

  FM output                                Pin 4

  Sound out (left)                         Pin 5

  Ground                                   Pin 6

                            INTERRUPT SELECTION

                 IRQ                                  JP1

  »                 7                          Pins 1 & 2 closed

                    2                          Pins 7 & 8 closed

                    3                          Pins 5 & 6 closed

                    5                          Pins 3 & 4 closed

                        BASE I/O ADDRESS SELECTION

               Address                                 JP4

  »                220h                     Pins 3 & 7, 4 & 8 closed

                   240h                     Pins 1 & 5, 2 & 6 closed

                               DMA SELECTION

         Channel                   JP2                      JP3

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

              3             Pins 3 & 4 closed        Pins 3 & 4 closed

                           CD ROM TYPE SELECTION

                  Type                                  J6

  »               Panasonic                      Pins 1 & 2 closed

                   Mitsumi                       Pins 2 & 3 closed

                           CD-ROM CONFIGURATION

                 Setting                               JCP2

  »                Enabled                            Closed

                  Disabled                             Open

                         CD ROM ADDRESS SELECTION

                Address                               JCP1

  »                300h                              Closed

                   340h                               Open