September 2002
Intermediate to advanced
332 pages
11h 1m
English
Content preview from IBM eServer zSeries 900 Technical Guide
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14 IBM eServer zSeries 900 Technical Guide
Most ESA/390 architecture instructions with 32-bit operands have new 64-bit and 32- to
64-bit analogs.
New 64-bit branch instructions.
64-bit addressing is supported for both operands and instructions for both real addressing
and virtual addressing.
64-bit address generation.
z/Architecture provides 64-bit virtual addressing in an address space, and 64-bit real
addressing.
64-bit control registers.
z/Architecture control registers can specify regions, segments, or can force virtual
addresses to be treated as real addresses. The prefix area is expanded from 4K to 8K
bytes.
New instructions provide quad-word storage consistency.
The 64-bit I/O architecture allows CCW indirect data addressing to designa ...
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