參數(shù)資料
型號: 82C931
廠商: Electronic Theatre Controls, Inc.
英文描述: Plug and Play Integrated Audio Controller
中文描述: 即插即用集成音頻控制器
文件頁數(shù): 45/64頁
文件大小: 634K
代理商: 82C931
82C931
912-3000-035
Revision: 2.1
Page 37
OPTi
5.4
Two types of registers can be accessed through WSBase:
Windows Sound System (WSS) and Codec registers
WSBase Register
These registers are accessed through the WSBase register
and use the same type of indexing scheme as MCBase (CPU
Direct I/O R/W). The bit formats for WSS-related registers are
given in Table 5-8 and Table 5-9 shows the Codec-related
registers.
SBBase+0Eh
DAP Output Buffer Status Register (RO
DAP output
buffer is full:
(1)
0 = Empty
1 = Full
(1) This flag is set in the DAP when data is written in the output data bus buffer and cleared when the host CPU or the DMA controller reads
the data in the output data bus buffer.
Note:
Reading this register will also clear the Digital Audio Processor interrupt request.
Output Buffer
Table 5-7
SBBase Registers for FM and DAP Applications (cont.)
7
6
5
4
3
2
1
0
Table 5-8
WSBase Registers for Windows Sound System Applications
7
6
5
4
3
2
1
0
WSBase+00h-03h
WSS Configuration Register (W0)
Default = 00h
Reserved
IRQ sense
source:
0 = Normal
1 = auto-inter-
rupt selection
WSS IRQ select:
000 = Disable
001 = IRQ7
010 = IRQ9
011 = IRQ10
100 = IRQ11
101 = IRQ5
110 = Reserved
111 = Reserved
WSS DRQ select:
Playback
Disable
DRQ0
DRQ1
DRQ3
Disabled
DRQ0
DRQ1
DRQ3
Capture
Disable
Disable
Disable
Disable
DRQ1
DRQ1
DRQ0
DRQ0
000 =
001 =
010 =
011 =
100 =
101 =
110 =
111 =
WSBase+00h-03h
WSS Version Register (R0)
Default = 00h
Channel
available:
0 = DRQ0/1/3
and
IRQ7/9/10/
11 available
1 = DRQ1/3 and
IRQ7/9
available
IRQ sense:
0 = No interrupt
1 = WSS inter-
rupt active
Version: 04h
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