OS_Byte 4 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_Byte 15 – SWI Calls
» OS_Byte 4OS
» OS_Byte
» OS_Byte 4
OS_Byte 4
(SWI &06)
| Entry | |
|---|---|
| R0 | 4 |
| R1 | New state |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Old state |
| R2 | Corrupted |
Use
The purpose of this call is to alter the effect of the four arrow keys and the End key.
Notes
The value of R1 determines their state.
OS_Byte 237 may be used to write and read this state.
The ‘End’ key was also known as the ‘Copy’ key on Acorn branded keyboards.
See also
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