=> R0 = 21
R1 = pointer to block containing :
0 = 0
1 = 1-4 shape number
2 = 0-8 /w/ - width in bytes
3 = 0-32 /h/ - height in pixels
4 = 0-(w*4-1) x active point (in pixels from left)
5 = 0-(h-1) y active point (in pixels from top)
6 = LSB of pointer to shape data
7
8
9 = MSB of pointer
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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