The assembler calls the exit with a request type of 1 (OPEN) at the
start of the assembly.
The exit sets the
return code in the Exit Parameter List to one of
these:
- 0
- Instructs the assembler to open the terminal data set, and supply
the terminal output records to the exit in later PROCESS calls.
The
exit can set the record length for the terminal data set by setting
the reason code to 4 and the buffer length field. The buffer length field can
be set to any value from 1 to 255 on z/OS and CMS, or from 1 to 125
on z/VSE. If the value is zero or greater than 255 on z/OS and CMS,
or zero or greater than 125 on z/VSE, the assembler issues message ASMA404W and does not call the exit for any further processing.
Note: A reason code of 16 indicates a REINIT call is required.
- 4
- Indicates that the exit writes the terminal records in later
WRITE calls. If you want to provide the assembler with the values
for the system variables &SYSTERM_DSN, &SYSTERM_MEMBER, and
&SYSTERM_VOLUME, the exit must set the reason code to 4 and place
the values in the data set name, member name, and volume serial fields of the exit-specific information block.
The assembler also shows this information in the Diagnostic Cross
Reference and Assembler Summary section of the listing, and includes
it in the associated data file Output File Information record.
Note: A reason code of 16 indicates a REINIT call is required.
- 16
- Instructs the assembler to open the terminal data set and make
no further calls to the exit.
If you provide a character string in the str6 suboption
of the EXIT assembler option, the buffer pointer field points to the character
string, and the buffer length contains the length of the character string.
The buffer length is set to zero if there is no character string.
HLASM Programmer's Guide
Copyright IBM Corporation 1990, 2014