You can use &SYSOPT_DBCS to determine if the DBCS assembler option was supplied for the assembly of your source module. &SYSOPT_DBCS is a Boolean system variable symbol, and has a global scope.
If the DBCS assembler option was specified, &SYSOPT_DBCS is assigned a value of 1. If the DBCS assembler option was not specified, &SYSOPT_DBCS is assigned a value of 0.
For more information about the DBCS assembler option, see the section "DBCS" in the HLASM Programmer's Guide.
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