OS_Byte 129 (scan single) (changes)
Showing changes from revision #2 to #3:
Added | Removed | Changed
OS SWI Calls
» OS_Byte
» OS_Byte 129
» OS_Byte 129 (scan keyboard for single key)
OS_Byte 129 (scan keyboard for single key)
(SWI &06)
| Entry | |
|---|---|
| R0 | 129 (&81) |
| R1 | &80 – &FF |
| R2 | &FF |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | 0 if not pressed, or 255 if pressed |
| R2 | 0 if not pressed, or 255 if pressed |
Use
The purpose of this call is to scan the keyboard for a range single of key. keys.
See also
Social
Follow us on
and
and
ROOL Store
Buy RISC OS Open merchandise here, including SD cards for Raspberry Pi and more.