Difference between revisions of "Turbo Sound Next Control"
From SpecNext official Wiki
| Line 1: | Line 1: | ||
{{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 | ||
Revision as of 15:17, 28 August 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: SID, AY3, AY2, AY1. |
Otherwise, selects the register number to access from the active sound chip.