Fail. Principles of Operation is about the machine, not the assembler. Extended mnemonics are specific to the assembler, not the machine.
The GNU assembler has some different extended mnemonics than HLASM for the same instructions and the same extended mnemonic produces different instructions depending on the assembler. For example, in HLASM JLH = BRCL 2 but in gas JLH = BRC 6. And since IBMers were responsible for both, one is not more correct than the other. On Fri, 21 Sep 2012 10:52:21 -0600, Steve Comstock wrote: >I asked the HLASM team about that once and it was >a conscious decision to let some extended mnemonics >only be specified in the POO, or at least not to >produce new HLASM documentation until the next >release of the Assembler.
