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Avance Logic Inc.
ALS300
19
Bit 7..1
reserved
Bit 0
dummy read/write bit AGC enable
MX44
treble left control (Dummy R/W)
Default 80h
Dummy read/write register
Bit 7..4
dummy read/write bit
Bit 3..0
reserved
MX45
treble right control (Dummy R/W)
Default 80h
Dummy read/write register
Bit 7..4
dummy read/write bit
Bit 3..0
reserved
MX46
bass left control (Dummy R/W)
Default 80h
Dummy read/write register
Bit 7..4
dummy read/write bit
Bit 3..0
reserved
MX47
bass right control (Dummy R/W)
Default 80h
Dummy read/write register
Bit 7..4
dummy read/write bit
Bit 3..0
reserved
MX4C
output mixer control 2 (Dummy R/W)
Default 1Fh
Bit 7~5
Reserved
Bit 4
music left enable
Bit 3
music right enable
Bit 2
digital audio D/A left enable
Bit 1
digital audio D/A right enable
Bit 0
mono input enable
0
mute
1
enable audio into output mixer
Sound Blaster 16 Configuration Register:
MIXER.80
Sound Blaster interrupt setup
Default 00h
Bit 7..5
reserved (read as 1)
Bit 4
IRQ11
Bit 3
IRQ10
Bit 2
IRQ7
Bit 1
IRQ5
Bit 0
IRQ9
0 :
disable interrupt
1 :
enable interrupt
Only 1 bit can be set at any time
Any write to PnP logical device 0 port 70h will set and reset corresponding bit in this register.
Write this register will generate SB-MIXER IRQ except in PnP configuration state.
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