OS_Word 21_6 (changes)
Showing changes from revision #1 to #2:
Added | Removed | Changed
Programmer's OS Reference SWI Manuals Calls
» Part OS_Word 15 – SWI Calls
» OS OS_Word 21
» OS_Word 21,6OS_Word
» OS_Word 21
» OS_Word 21,6
OS_Word 21,6
(SWI &07)
| Entry | |
|---|---|
| R0 | 21 (&15) |
| R1 | Pointer to block, containing: |
| +0 | 6 (reason code) |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Preserved, block updated |
| +1 | X LSB |
| +2 | X MSB |
| +3 | Y LSB |
| +4 | Y MSB |
Use
The purpose of this call is to read the pointer (not mouse) position from the two signed 16-bit values.
Notes
If the mouse and pointer are linked, then the pointer position will be updated with the mouse position each VSync interrupt.
See also
Social
Follow us on
and
and
ROOL Store
Buy RISC OS Open merchandise here, including SD cards for Raspberry Pi and more.