20 Apr
2002
20 Apr
'02
11:57 a.m.
On Sat, 20 Apr 2002, Dave McGuire wrote:
My mistake...it was my impression that z/Architecture is very similar
to that of ESA/390, more so than the other evolutionary steps in the
S/360->S/390 family architectures.
64-bit addressing, twice as many instruction formats. That's a pretty big
change. The change from ESA/370 to ESA/390 wasn't that drastic.
Peace... Sridhar
Regardless of what industry buzzwords the
marketroids are trying to
take advantage of...those machines implement the S/390 architecture,
which is a mainframe architecture descended from mainframe
architectures.
Actually, those machines don't implement ESA/390. They implement z/Arch.
But z/Arch definitely evolved from ESA/390 R4.