18 Oct
2011
18 Oct
'11
1:49 p.m.
When people
wanted to port the IBM OS family to x86 they wrote Hercules to
emulate the hardware. The OS doesn't make sense on anything but System/360,
370, 390, Z, etc. It was easier to port the hardware than the software.
When IBM wanted to port the IBM OS family to POWER, they did the same thing.
(Z, in your list above.)