Valid characters
Any printable character specified appears in the heading, including
spaces.
Double-byte data can be used when the DBCS assembler option is specified.
The double-byte data must be valid. Variable symbols are allowed.
However, the following rules apply to ampersands and single quotation marks:
- The DBCS ampersand and single quotation mark are not recognized as delimiters.
- A double-byte character that contains the value of an EBCDIC
ampersand or single quotation mark in either byte is not recognized as a delimiter
when enclosed by SO and SI.
- A single ampersand initiates an attempt to identify a variable symbol
and to substitute its current value.
- A pair of ampersands is printed as one ampersand.
- A pair of single quotation marks is printed as one single quotation mark.
- An unpaired single quotation mark followed by one or more spaces
simply ends the string of characters printed. If a non-space
character follows an unpaired single quotation mark, the assembler issues
an error message and prints no heading.
Only the characters printed in the heading count toward the maximum
of 100 characters allowed. If the count of characters to be printed
exceeds 100, the heading that is printed is truncated and error
diagnostic message
ASMA062E Illegal operand format
is issued.
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