Before changing an instruction with OPSYN, you should create a
new name for the original instruction, so that you can use OPSYN
again later to restore the original instruction using that name.
_L OPSYN L Save original definition
L OPSYN MY_L Create my own definition
...
L OPSYN _L Restore original definition
The new name can also be used in the case where a macro defined
with OPSYN needs to intercept an instruction but may need to
reissue it unchanged, for example like IEABRC.
Jonathan Scott, HLASM
IBM Hursley, UK
