Sound_ReadControlBlock (changes)
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Programmer's SoundChannels Reference Manuals
» Part 15 – SWI Calls
» Sound_ReadControlBlockSound
» Sound_ReadControlBlock
Sound_ReadControlBlock
(SWI &4018B)
| Entry | |
|---|---|
| R0 | Channel number (1 – 8) |
| R1 | Offset to read from (0 – 255) |
| Exit | |
|---|---|
| R0 | Preserved (or 0 if fail, invalid channel, or invalid read offset) |
| R1 | Preserved |
| R2 | 32-bit word read (if R0 non-zero on exit) |
Use
Reads 32-bit data values from 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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