Radio Shack TRS-80 Model 4 Owner's Manual page 324

You can improve the readability of a JCL file by using upper case for
macros and lower case for executable lines, such as TRSDOS
commands, or vice versa.
Using IIASSIGN
JCL provides the IIASSIGN macro to set a token's logical value true,
and to assign a character string value to a token.
The syntax for the IIASSIGN macro is:
IIASSIGN
token=character strin5
character string can consist of up to 32 characters. Any character on
the keyboard is allowed except a double-quotation mark ( " ).
Error Conditions
Any time you use IIASSIGN, there must be at least one character
assigned as a value or the compiling aborts.
Examples
In any of the previous examples that used the IISET macro, the
IIASSIGN macro could have been substituted. The character string
value assigned to the token has no effect on the JCL logic.
In the following example, if the token A is true, the tokens P1, KI, and
PR are all set to true. This example assigns character string values to
the tokens.
• TEST/JCL
IIIF A
IIASSIGN Pl=PROGRAM/BAS
IIASSIGN KI=ALL
IIASSIGN PR=80
IIEND
Using
II.
Comment and
IIQUIT
Compilation comments (//. Comment) are not written to the
SYSTEM/JCL file. They are displayed on the screen as they are
encountered during compilation. Thus, they act as a visual status log
of the compile.
The IIQUIT macro aborts the compilation stage if the JCL detects an
invalid condition. This macro lets you make sure all needed tokens
are entered before any execution takes place.
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