On Mon, 22 Feb 2016 11:13:37 -0000 "Dave Wade" <[email protected]> wrote:
> > > > > > You can't seriously mean that you think that a 32-bit application and > > > a 64-bit application would be expected to be compatible with each > > > other? I would expect the 32-bit code to work in 32-bit mode, but > > > having it work if you are in 64-bit mode is a ridiculous expectation. > > > > Really? It works fine on IBM's z/OS. > > > > It seems ridiculous to me that you think it shouldn't. This is what I > > have been saying. IBM moved from 24 bit to 31 bit to 64 bit and > > everything still works. No expanded footprint, no duplicate libraries, > > no problem. > > > > That’s not (quite) true. As I said before problem state code works fine. That is 99.9% of all applications code. > Anything that uses supervisor mode will likely fail. Absolutely not true. I don't know of any code we wrote for XA and ESA that runs sup state that had any problems going forward. We continue to support ESA code to this day. I can't remember anything that failed. I also can't remember an OS service that wasn't upward compatible. _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
