Using DBCS causes the compiler to recognize X'0E' (SO) and X'0F' (SI) as shift codes for the double-byte portion of an alphanumeric literal.
DBCS option syntax .-DBCS---. >>-+--------+-------------------------------------------------->< '-NODBCS-'
Default is: DBCS
Abbreviations are: None
With DBCS in effect, the double-byte portion of the literal is syntax-checked and the literal remains category alphanumeric.
related references
Conflicting compiler options