OS_Word 21_4 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_Word 15 – SWI Calls
» OS OS_Word 21
» OS_Word 21,4OS_Word
» OS_Word 21
» OS_Word 21,4
OS_Word 21,4
(SWI &07)
| Entry | |
|---|---|
| R0 | 21 (&15) |
| R1 | Pointer to block, containing: |
| +0 | 4 (reason code) |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Preserved, block updated containing: |
| +1 | X LSB |
| +2 | X MSB |
| +3 | Y LSB |
| +4 | Y MSB |
Use
The purpose of this call is to read the unbuffered mouse position.
Notes
The unbuffered mouse position, may be significantly out of step with the buffered values.
See also
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