Specifies the address of the console message prefix of the command
to scan.
EOD=
Specifies the address to which the routine returns when the
end of the command is detected.
ERROR=
Specifies the address to which the routine returns when a syntax
error is detected. Register 0 will contain the address of the parameter
being scanned. The residual length of the command is in the low-order
byte of register 2.
BLANK=
Specifies how a blank is interpreted.
DLM
Specifies that a blank is a normal delimiter and any number
of contiguous blanks is treated as one comma.
EOD
Specifies that a blank is to be interpreted as the end of data
(EOD).
NORMAL=
This parameter specifies that after the macro processing routine
executes, the issuing program can resume execution at an instruction
other than the instruction that immediately follows the macro.