OS_Byte 212 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_Byte 15 – SWI Calls
» OS_Byte 212OS
» OS_Byte
» OS_Byte 212
OS_Byte 212
(SWI &06)
| Entry | |
|---|---|
| R0 | 212 (&D4) |
| R1 | EOR value |
| R2 | AND value |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Previous volume |
| R2 | Bell frequency (see OS_Byte 213) |
Use
The purpose of this call is to read or write the sound volume for the bell.
Notes
This call reads or sets the bell volume, the range 128 (loud) – 248 (soft).
*Configure Loud sets the volume to &90.
*Configure Quiet sets the volume to &D0.
To read/write the bell channel use OS_Byte 211. To read/write the frequency use OS_Byte 213. To read/write the duration use OS_Byte 214.
See also
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