Yes but it can be XA for 31 or 64 bit. You SET MACH XA|XC|ESA but to go into 64-bit mode the machine has to execute a sigp instruction with parameters set up to put it into z/Arch mode.
On Fri, 2007-08-10 at 16:09 -0400, David Boyes wrote: > Doesn't IND USER EXT show a MACH= line? OK, not a single function > command, but the information is there w/o running control blocks. > > Still sounds like a requirement, though. >
