Turbo Sound Next Control

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Number $FFFD
Decimal 65533
Short desc. Controls stereo channels and selects active sound chip and sound chip channel.
Bit Mask %11-- ---- ---- --0-
Readable No
Writable Yes
Subsystem Turbo Sound Next

When written to with the top bit set, selects the active sound chip.

Bit Function
7 Must be 1
6 Enable left audio
5 Enable right audio
4-2 Must be 1
1-0 Select active chip. 0-3: unused, AY3, AY2, AY1.

Otherwise, selects the register number to access from the active sound chip.