Read the source of Hercules and you will find that your statement is not correct.?
On Sunday, November 20, 2022, 9:23 PM, Mark Waterbury <mark.s.waterbury@...> wrote:
To all,
There is one big "flaw" in this thread, the part about adding newer instructions " for use in 370 mode ..." -- I believe Roger Bowler set out to develop hercules-390 as a S/390 emulator, from "day one"... it only runs S/370 SCPs by virtue of the fact that the real S/390 machines could also do so ...? because those machines provided a certain amount of backward compatibility.
?
So, on a real S/390, you would have newer problem-state instructions available to use, even if you were running an older SCP that was originally for S/360 or S/370 ...
Just saying ...
Cheers,
Mark S. Waterbury
