OS_Byte 211 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_Byte 15 – SWI Calls
» OS_Byte 211OS
» OS_Byte
» OS_Byte 211
OS_Byte 211
(SWI &06)
| Entry | |
|---|---|
| R0 | 211 (&D3) |
| R1 | EOR value |
| R2 | AND value |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Previous channel |
| R2 | Bell volume (see OS_Byte 212) |
Use
The purpose of this call is to read or write the sound channel for the bell (VDU 7?).
Notes
The default channel is 1.
To read/write the bell volume use OS_Byte 212. To read/write the frequency use OS_Byte 213. To read/write the duration use OS_Byte 214.
See also
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