Sound command
| OSWord call | Action | Available on: | ||||
|---|---|---|---|---|---|---|
| (dec) | (hex) | BBC | Master | Electron | ||
| 7 | 07 | Sound command | x | x | x | |
This routine takes an 8 byte parameter block addressed by the X and Y registers. The 8 bytes of the parameter block may be considered as the four parameters used for the SOUND command in BASIC.
Parameter block
| XY+ | Length | Content |
|---|---|---|
| 0 | 2 | Channel |
| 2 | 2 | Amplitude |
| 4 | 2 | Pitch |
| 6 | 2 | Duration |
For example, to perform a
SOUND 1,-15,200,20then the contents of the table would be:
Parameter block
| XY+ | Content | Sound Param | Value |
|---|---|---|---|
| 0 | Channel | 1 | 0x01 |
| 1 | 0x00 | ||
| 2 | Amplitude | -15 | 0xF1 |
| 3 | 0xFF | ||
| 4 | Pitch | 200 | 0xC8 |
| 5 | 0x00 | ||
| 6 | Duration | 20 | 0x14 |
| 7 | 0x00 |
Last modified October 6, 2021: Move BBC content into subdirectory to allow more bbc content (23080e8)