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Subroutine Instructions Section 3-17
3-17 Subroutine Instructions
Instruction
Mnemonic
Code
Symbol/Operand Function Location
Execution
condition
SUBROUTINE
CALL
SBS
@SBS
091
Output
Required
MACRO
MCRO
@MCRO
099
Output
Required
SUBROUTINE
ENTRY
SBN
092
Output
Not required
SUBROUTINE
RETURN
RET
093
Indicates the end of a subroutine program. Output
Not required
N: Subroutine
number
SBS(091)
N
Main program
Subroutine
program
(SBN(092) to
RET(093))
Execution condition ON
Program end
Calls the subroutine with the specified subroutine number and executes that
program.
N: Subroutine
number
S: 1st input
parameter word
D: 1st output
parameter word
MCRO(099)
N
S
D
MCRO(099)
MCRO(099)
Execution of subroutine
between SBN(092) and
RET(093).
The subroutine uses A600
to A603 as inputs and A604
to A607 as outputs.
Calls the subroutine with the specified subroutine number and executes that
program using the input parameters in S to S+3 and the output parameters in
D to D+3.
N: Subroutine
number
SBN(092)
N
Subroutine region
or
Indicates the beginning of the subroutine program with the specified
subroutine number.