Difference between revisions of "Turbo Sound Next Control"

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| 4-2 || Must be 1
 
| 4-2 || Must be 1
 
|-
 
|-
| 1-0 || Select active chip. 0-3: SID, AY3, AY2, AY1.
+
| 1-0 || Select active chip. 0-3: unused, AY3, AY2, AY1.
 
|}
 
|}
  
  
 
Otherwise, selects the register number to access from the active sound chip.
 
Otherwise, selects the register number to access from the active sound chip.

Revision as of 19:39, 17 November 2017

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.