ALS300 Datasheet, PDF (9/66 Pages) List of Unclassifed Manufacturers – Media Audio Controller SPEC

Avance Logic Inc.
ALS300
In pass-thru mode,
ENTER_UART 03Fh
Return ack byte (0FEh) in midi-data, generate an interrupt if switch to UART mode successfully.
Reading data port will clear the interrupt signal.
MIDI_RESET 0FFh
Return ack byte (0FEh) in midi-data, generate an interrupt, stay in pass-thru mode.
In UART mode,
MIDI_RESET 0FFh
Flush MIDIIN FIFO, wait until MIDIOUT FIFO/MIDI RAM empty, go to pass-thru mode .
MIDI-DATA
Read/write
Read
Bit 7..0
MIDI data input in UART mode or acknowledge byte
Write
Bit 7..0
MIDI data output in UART mode
ALS300 Mixer Register Definition:
MIXER-INDEX
Read/write
Bit 7 0
1
mixer
control
Bit 6..0
index
MIXER-DATA
Read/write
Bit 7..0
mixer or control data register by mixer-index
MX00-MX7F mixer data register 00-7F base on mixer-index value
CR00-CR3F control data register 00-3F base on mixer-index value with bit 7 and 6 = 1.
SBCONFIGn = MX80-MXBF
Write the following mixer register will generate a SB-Mixer type IRQ to “PCI block” :
MX00, MX02, MX04, MX06, MX08, MX0A, MX0C, MX22
MX24, MX26, MX28, MX2E, MX30, MX31, MX32, MX33
MX34, MX35, MX36, MX37, MX38, MX39, MX3A, MX3B
MX3C,MX3D,MX3E, MX3F, MX40, MX41, MX42, MX4C
MX80, MX81, MXC6,MXC8
Sound Blaster Pro:
MX00
Write only
mixer reset
Any write to this port will reset MX00-MX7F to default value. ESP_RESET() does not affect any of the
mixer register.
MX02
master volume
9