z/Architecture

(redirected from Zarchitecture)

z/Architecture

The hardware architecture in IBM's Z mainframes. z/Architecture was an evolutionary step beyond ESA/390. The primary difference is the widening of all registers from 32 to 64 bits and the use of 64-bit addressing for both real and virtual storage. It includes the ability to execute programs using older 24 and 31-bit addressing so that ESA/390 programs run unchanged.

Introduced in 2000, z/Architecture added 130 instructions, many of which deal with 64-bit data, and support for Variable Workload License Charges, which allows software to be priced based on usage. See zEnterprise, IBM Z and z/OS.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
CA management solutions are also taking advantage of the new zArchitecture instructions and coding techniques in z/OS v1.6 to further optimize mainframe management.