Ref: Your note of 29 September 2017, 05:08:48 -0700
There is no incrementing machine hardware level, and even if
there were, there is no guarantee that all "upgrades" are totally
compatible.
An alternative approach is to check whether an opcode which was
introduced in that level is a known machine opcode, for example
using LAT:
AIF (O'LAT EQ 'O').ZS6OK
If you want to check OPTABLE, the only safe approach is to check
for existing known OPTABLE values and assume that if it is none
of those, it is a future level!
Jonathan Scott
HLASM team
IBM Hursley UK
