Atari ST series Technical Reference Manual page 212

Change MFP Interrupt Vector
Mfpint()
T h is f u n c t i o n is u s e d t o c h a n g e a n i n t e r r u p t v e c t o r o n t h e M F P c h i p .
C macro format
in t n u m b e r -
l o n g v e c t o r ;
M f p i n t ( n u m b e r , v e c t o r )
Machine language format
v e c t o r , - ( s p )
m o v e .l
# n u m b e r , - (s p )
m o v e .l
m o v e . w # 1 3 , - ( s p )
t r a p # 1 4
a d d q .l # 8 , s p
Inputs
l o n g
v e c t o r
w o r d
n u m b e r
Results
N o n e
See also
J d i s i n t ( ) , J e n a b i n t ( )
204
Mfpint
P o i n t e r t o t h e n e w i n t e r r u p t h a n d l e r r o u ­
ti n e to u s e .
N u m b e r o f t h e M F P i n t e r r u p t t o c h a n g e .
Opcode = 13