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Sound_WriteControlBlock
SoundChannels
» SWI Calls
» Sound_WriteControlBlock
Sound_WriteControlBlock
(SWI &4018C)
| Entry | |
|---|---|
| R0 | Channel number (1 – 8) |
| R1 | Offset to read from (0 – 255) |
| R2 | 32-bit word to write |
| Exit | |
|---|---|
| R0 | Preserved (or 0 if fail, invalid channel, or invalid write offset) |
| R1 | Preserved |
| R2 | previous 32-bit word (if R0 non-zero on exit) |
Use
Writes 32-bit data values to the Sound Channel Control Block (SCCB) for the designated channel. This call can be used to read parameters not catered for in the Sound_Control calls returned by Voice Generators, using an area of the SCCB reserved for the programmer.
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