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OS_Word 21_0
OS SWI Calls
» OS_Word
» OS_Word 21
» OS_Word 21,0
OS_Word 21,0
(SWI &07)
| Entry | |
|---|---|
| R0 | 21 (&15) |
| R1 | Pointer to 10-byte block |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Preserved |
Use
The purpose of this call is to define a pointer shape.
Notes
This OS_Word defines a pointer shape, which may be selected with OS_Byte 106. Pointers are always defined in 2 bits per pixels, colour 0 is transparent. The shape data is given from top to bottom, with bits 0,1 in each byte giving the left most pixel. Mouse colours can be set with VDU 19.
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