VT82C686B

Manufacturer Part NumberVT82C686B
ManufacturerETC-unknow
VT82C686B datasheet
 


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7HFKQRORJLHV ,QF
I/O Registers – SoundBlaster Pro
Offset SB Pro Registers (220 or 240h typ)
0
FM Left Channel Index / Status
1
FM Left Channel Data
2
FM Right Channel Index / Status
3
FM Right Channel Data
4
Mixer Index
5
Mixer Data
6
Sound Processor Reset
7
-reserved-
8
FM Index / Status (Both Channels)
9
FM Data (Both Channels)
A
Sound Processor Data
B
-reserved-
C
Sound Processor Command / Data
Sound Processor Buffer Status
D
-reserved-
E
Snd Processor Data Available Status
F
-reserved-
Port SB Pro Regs (same as offsets 8 & 9) Default Acc
388h FM Index / Status
389h FM Data
The above group of registers emulates the “FM”, “Mixer”, and
“Sound Processor” functions of the SoundBlaster Pro.
Revision 1.71 June 9, 2000
I/O Registers – Game Port
Default Acc
Offset Game Port (200-20F typical)
RW
0
-reserved-
WO
1
Game Port Status
RW
1
Start One-Shot
WO
2-F
-reserved-
WO
RW
WO
00
--
RW
WO
RO
00
--
WR
RD
00
--
RO
00
--
RW
WO
-38-
VT82C686B
Default Acc
00
--
RO
WO
00
--
Register Overview