ALS300 Datasheet, PDF (64/66 Pages) List of Unclassifed Manufacturers – Media Audio Controller SPEC

Avance Logic Inc.
ALS300
Appendix C : Register contents of ALS300 Wave Engine
Wave engine RAM index : (Bit 7 = 0)
IOBASE+8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
Channel Number (N)
Register index
N : Channel number of Wave engine
Note : SW should set all RAM to their default value to avoid causing noise.
Register 0
Default Value : 00000000h
Bit Type
Function
31
Reserved
30:16 R/W Repeat offset (RO)
15
Reserved
14:0 R/W 2’s complement of samples per instrument (TL)
nRO is the starting point (in sample) in the wave-form of instrument that could repeat.
Register 1
Default Value : 00000000h
Bit Type
Function
31
R/W Key on control (KON) 1 : Key on 0 : Key off
30:28 R/W Frequency Modulation Coefficient (FMC)
27
R/W 8-bit flag (F8) 1 : 8-bit data 0 : 10-bit or 12-bit data
26:24 R/W Amplitude Modulation Coefficient (AMC)
23:21 R/W Modulation Tone (MT)
20:0 R/W Starting address of wave samples (SA)
n FMC/AMC table
FMC/AMC AM magnitude FM percent (FN<180h) FM percent (FN≥180h)
0
0 dB
0%
0%
1
1.78 dB
0.8 %
1.6 %
2
2.91 dB
1.2 %
2.0 %
3
3.66 dB
2.0 %
3.1 %
4
4.50 dB
2.7 %
3.9 %
5
5.91 dB
5.9 %
8.6 %
6
7.41 dB
11.7 %
17.2 %
7
11.92 dB
23.4 %
34.4 %
64