ALS300 Datasheet, PDF (57/66 Pages) List of Unclassifed Manufacturers – Media Audio Controller SPEC

Avance Logic Inc.
If external E²PROM is enabled, subsystem ID will be load from
E²PROM after reset.
Interrupt Line Register :
Index : 3Ch R/W
Default : 0x00
Bit 7~0 IRQ number
Interrupt Pin Register :
Index : 3Dh Read only
Default : 01h (INTA#)
PNP register array : (write only PNPS[1..0]=[1x])
index register 279h (Write only)
write data port A79h (Write only)
PNP00
Read Port Register
Write only (Enabled when PNPS[1..0]=1X)
Bit 7~0
GCR97.31~24
PNP07
Device Number register
Write only(Enabled when PNPS[1..0]=1X)
Bit 7~2
Reserved
Bit 1~0
GCR98.7~6
PNP0-30
SB activate register
Write only(Enabled when PNPS[1..0]=1X)
Bit 0
GCR98.19
Bit 7~1
Reserved
PNP0-31
SB IO range check
Write only(Enabled when PNPS[1..0]=1X)
Bit 7~2
Reserved
Bit 1
GCR98.23
Bit 0
Reserved
PNP0-60
SB Base-high
Write only(Enabled when PNPS[1..0]=1X)
Bit7~2
Reserved
Bit 1
SBBASE.9 (GCR98.13)
Bit 0
SBBASE.8 (GCR98.12)
PNP0-61
SB Base-low
Write only (Enabled when PNPS[1..0]=1X)
Bit 7~4
SBBASE.7~4 (GCR98.11~8)
Bit 3~0
Reserved
PNP0-74
SB DMA
Write only (Enabled when PNPS[1..0]=1X)
Bit7~3
Reserved
Bit 2~0
SBDMA (GCR98.26~24)
PNP1-30
OPL3 activate register
Write only (Enabled when PNPS[1..0]=1X)
Bit 7~1
Reserved
Bit 0
GCR98.18
PNP1-31
OPL3 IO range check
Write only(Enabled when PNPS[1..0]=1X)
Bit 7~2
Reserved
Bit 1
GCR98.22
Bit 0
Reserved
PNP1-60
OPL3 Base-high
Write only(Enabled when PNPS[1..0]=1X)
Bit7~3
Reserved
Bit 2~0
OPLBASE.10~8 (GCR97.7~5)
PNP1-61
OPL3 Base-low
Write only (Enabled when PNPS[1..0]=1X)
Bit 7~3
OPLBASE.7~3 (GCR97.4~0)
ALS300
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