On May 10, 2022, at 13:06:21, Gary Weinhold wrote: > > I think VM/370 (CP or CMS, perhaps both) used to rely on the CC after a > calls to internal routines. > > As a debugger, since it's tracing the instructions, I wouldn't be > surprised if it knew exactly which instruction set the CC. > I agree; that works ini a dynamic trace or single-step. For a Static disassembly, it's safest just to show a numeric CC mask.
> On 2022-05-10 2:29 p.m., Paul Gilmartin wrote (snipped): >> What if there are multiple code paths to the BC? >> (I had one co-worker perverse enough to rely on the >> CC after a subroutine return. He reset the program >> Mask before the BR 14 and I had to support it on a >> 370.) -- gil
