820
Subroutines Section 3-19
2. The second MCRO(099) instruction passes the input data in CIO 0200 to
CIO 0203 and executes the subroutine. When the subroutine is complet-
ed, the output data is stored in CIO 0400 to CIO 0403.
The second MCRO(099) instruction operates in the same way, but the input
data in CIO 0200 to CIO 0203 is passed to A600 to A603 and the output
data in A604 to A607 is passed to CIO 0400 to CIO 0403.
D: 0300
D+1: 0301
D+2: 0302
D+3: 0303
A604
A605
A606
A607
1
1
1
Input
Output
Subroutine 1
Output data is passed when
returning from the subroutine.
Macro area output words
Input data is passed when
the subroutine is called.
Macro area input words
Execution of
subroutine 1
Just the addresses
are different.