Atari ST series Technical Reference Manual page 383

The Intelligent Keyboard Controller
T h is c o m m a n d c a u s e s t h e I K B D t o s e n d a p a c k e t w h i c h c o n t a i n s i n f o r m a ­
ti o n a b o u t t h e s c a l e f a c t o r u s e d f o r a b s o l u t i o n p o s i t i o n m o d e .
Packet returned
Byte
Number Description
1 $ F 6 ( s t a t u s p a c k e t h e a d e r )
2 $ 0 C T h e n u m b e r o f t h e c o r r e s p o n d i n g s e t c o m m a n d
3 H o r i z o n t a l d i s t a n c e (i n m o u s e u n i t s ) t h a t m u s t b e t r a v e l e d
b e f o r e t h e m o u s e
4 V e r tic a l d i s t a n c e (i n m o u s e u n i t s ) t h a t m u s t b e t r a v e l e d b e f o r e
th e m o u s e
5 - 8 P a d b y t e s (0 )
$8C Inquire Mouse Scale
x
p o s i t i o n c h a n g e s .
y
p o s i t i o n c h a n g e s .
375