L #In_Adr
SLD 3 // push 3 bit positions, to fit word address to pointer format.
LAR1
L IW [AR1,P#0.0]
// do something with the 1st input word.
L IW [AR1,P#2.0]
// do something with the 2nd input word.
L PIW [AR1,P#2.0] // sample access to peripherial input address.