> since they probably don't have the hardware farm And if they do, then they can test on back-level hardware natively.
What would really be nice, what would solve the "problem" for ISVs, is not necessarily full LGR capability, but simply a "dial down" capability in VM: "I know this is really a z14, but make it appear to this particular guest as a z12" -- which if I am understanding correctly is more or less a subset of LGR. Charles -----Original Message----- From: IBM Mainframe Assembler List [mailto:[email protected]] On Behalf Of Gary Weinhold Sent: Wednesday, March 27, 2019 11:50 AM To: [email protected] Subject: Re: Determing the Presence of an Instruction So it appears the LGR facility to limit the instruction set is not practical for those ISVs who wish to test thei software on prior generations of z hardware, since they probably don't have the hardware farm (unless LGR works on a couple of zPDTs hooked together).
