ALS300 Datasheet, PDF (22/66 Pages) List of Unclassifed Manufacturers – Media Audio Controller SPEC

Avance Logic Inc.
ALS300
1
ROMCS
0
1
internal pull up
external 10K pull up
internal pull down
Power up latched value
CR3.6
!ROMCS
CR3.5
MIDIOUT
CR3.6
0
E²PROM is disabled
1
E²PROM is enabled (Default)
CR3.5
0
external Wave Blaster midi (Standard-MPU401)
1
internal Wave engine midi (Special-MPU401)
CR4
(For Testing)
Same as PNP0-60
CR5
(For Testing )
Same as PNP0-61
CR6
Same as PNP0-70
CR7
Same as PNP1-60
CR8
Same as PNP0-74
CRA
Same as PNP3-30
CRB
Same as PNP1-61
CRC
Same as PNP3-60
CRD
Same as PNP3-61
CRE
Same as PNP3-70
CRF
Same as PNP2-60
CR11
Same as PNP2-61
CR17
FIFO status
Default 00h
Bit 7-3 read only
Bit 2-0 read/write
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reserved
Reserved
1
primary PCM FIFO underrun flag
1
MIDI output FIFO full flag
1
MIDI input FIFO overrun flag
1
flush MIDI in and out FIFO
1
flush primary PCM FIFO
1
active XRST_ to reset internal OPL3
Any time during DMA playback by primary FIFO, if the FIFO is empty when new sample is needed, bit
5 will be set.
Any time midi output FIFO is full, bit 4 will be set.
Any time a new midi input data is received and the midi input FIFO is full, bit 3 will be set.
Reading this register will clear all flags(ie. Bit 7-3).
Bit 2-0 are sticky, that is, hardware will not clear them automatically and it is need for software to clear
the bits.
22