Difference between revisions of "Turbo Sound Next Control"

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{{Port
 
{{Port
 
|Number=$FFFD
 
|Number=$FFFD
|PortMask=%11-- ---- ---- --0-
 
 
|ShortDesc=Controls stereo channels and selects active sound chip and sound chip channel.
 
|ShortDesc=Controls stereo channels and selects active sound chip and sound chip channel.
 
|Readable=No
 
|Readable=No
 
|Writable=Yes
 
|Writable=Yes
 
|Subsystem=Turbo Sound Next
 
|Subsystem=Turbo Sound Next
 +
|PortMask=%11-- ---- ---- --0-
 
}}
 
}}
 
 
When written to with the top bit set, selects the active sound chip.  
 
When written to with the top bit set, selects the active sound chip.  
  

Revision as of 23:02, 19 April 2019

Number $FFFD
Decimal
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.