VT8231 datasheet(46/132 Pages) ETC

номер детали	VT8231

подробное описание детали	SOUTH BRIDGE PC99 COMPLIANT

PDF	132 Pages

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производитель	ETC [List of Unclassifed Manufacturers]

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VT8231

Preliminary Revision 0.8 October 29, 1999

-40-

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I/O Registers – SoundBlaster Pro

Offset SB Pro Registers (220 or 240h typ)

Default Acc

FM Left Channel Index / Status

FM Left Channel Data

FM Right Channel Index / Status

FM Right Channel Data

4Mixer Index

Mixer Data

Sound Processor Reset

-reserved-

FM Index / Status (Both Channels)

FM Data (Both Channels)

Sound Processor Data

-reserved-

Sound Processor Command / Data

Sound Processor Buffer Status

-reserved-

Snd Processor Data Available Status

-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.

I/O Registers – Game Port

Offset Game Port (200-20F typical)

Default Acc

-reserved-

Game Port Status

1Start One-Shot

2-F

-reserved-

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