VT82C686B ETC-unknow, VT82C686B Datasheet - Page 43

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VT82C686B

Manufacturer Part Number
VT82C686B
Description
Manufacturer
ETC-unknow
Datasheet
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Function 5 I/O Base 0 Registers – AC97 Audio S/G DMA
Function 5 I/O Base 1 Registers – FM NMI Status
Function 5 I/O Base 2 Registers – MIDI / Game Port
Revision 1.71 June 9, 2000
Offset AC97 SGD I/O Registers
1F-1C SGD Write Channel Current Count
2F-2C SGD FM Channel Current Count
Offset AC97 / Audio Codec I/O Registers
Offset FM NMI Status Registers
Offset FM NMI Status Registers
1B-18 Reserved (Test)
2B-28 Reserved (Test)
88-FF -reserved-
17-14 SGD Write Chan Table Pointer Base
27-24 SGD FM Channel Table Pointer Base
30-7F -reserved-
83-80 AC97 Controller Command / Status
87-84 SGD Status Shadow
B-8 Reserved (Test)
F-C SGD Read Chan Current Count
7-4 SGD Read Chan Table Pointer Base
1-0 MIDI Port Base
3-2 Game Port Base
10
11
12
13
20
21
22
23
0
1
2
3
0
1
2
3
7HFKQRORJLHV ,QF
SGD Read Channel Status
SGD Read Channel Control
SGD Read Channel Type
-reserved-
SGD Read Channel Current Address
SGD Write Channel Status
SGD Write Channel Control
SGD Write Channel Type
-reserved-
SGD Write Channel Current Address
SGD FM Channel Status
SGD FM Channel Control
SGD FM Type
-reserved-
SGD FM Channel Current Address
FM NMI Status
FM NMI Data
FM NMI Index
-reserved-
0000 0000 WR
0000 0000 RO
0000 0000 RO
0000 0000 WR
0000 0000 RO
0000 0000 RO
0000 0000 WR
0000 0000 RO
0000 0000 RO
0000 0000 RW
0000 0000 RO
Default
Default
Default
Default
0330
0200
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
WC
WC
WC
Acc
RW
RW
RW
RW
RW
RW
Acc
Acc
Acc
RW
RW
RO
RO
RO
RD
RD
RD
-37-
Function 6 I/O Base 0 Registers – MC97 Modem S/G DMA
Offset MC97 SGD I/O Registers
4B-48 -reserved- (Test)
4F-4C SGD Read Chan Current Count
5B-58 Reserved (Test)
5F-5C SGD Write Channel Current Count
Offset AC97 / Modem Codec I/O Registers
8B-88 Modem Codec GPI Intr Status / GPIO 0000 0000 WC
8F-8C Modem Codec GPI Interrupt Enable
60-7F -reserved-
90-FF -reserved-
47-44 SGD Read Chan Table Pointer Base
57-54 SGD Write Chan Table Pointer Base
83-80 AC97 Controller Command / Status
87-84 SGD Status Shadow
40
41
42
43
50
51
52
53
SGD Read Channel Status
SGD Read Channel Control
SGD Read Channel Type
-reserved-
SGD Read Channel Current Address
SGD Write Channel Status
SGD Write Channel Control
SGD Write Channel Type
-reserved-
SGD Write Channel Current Address
Register Overview
0000 0000 WR
0000 0000 RO
0000 0000 RO
0000 0000 WR
0000 0000 RO
0000 0000 RO
0000 0000 RW
0000 0000 RO
0000 0000 RW
VT82C686B
Default
Default
00
00
00
00
00
00
00
00
00
00
WC
WC
Acc
RW
RW
RW
RW
Acc
RD
RD

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