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Z/Architecture

z/Architecture, initially and briefly called ESA Modal Extensions (ESAME), is IBM's 64-bit complex instruction set computer (CISC) instruction set architecture, implemented by its mainframe computers. IBM introduced its first z/Architecture-based system, the z900, in late 2000. Subsequent z/Architecture systems include the IBM z800, z990, z890, System…

Operating system support, Overview & Registers

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Bits
64-bit
Branching
Condition code, indexing, counting
Design
CISC
Designer
IBM
Encoding
Variable (2, 4 or 6 bytes long)
Endianness
Big

Topics to explore

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Overview

Features

Registers

Memory

Addressing

Operating system support

Non-IBM implementations

Advanced semantic analysis

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Map overview Semantic statistics

Z/Architecture

Nodes79
Edges78
Triples116
Avg. degree1.97
Density0.025316
Components1

How this topic connects Entity context

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Z/Architecture

Top relations

related to Non-IBM implementations · 16
Z/Architecture → Architecture, Architecture-compatible, ESA/390, FLEX-ES, G2/z800 CPUs, Hercules, Hitachi, Hitachi's, Hitachi-unique CPU, IBM, Itanium-based, July, Platform Solutions Inc, PSI, VOS3, While Hitachi
related to Operating system support · 13
Z/Architecture → Architecture, IBM, IBM's, Linux, MVS, Older, OS, TPF, Transaction Processing Facility, VM, VM Version, VSE, VSE Version
related to IBM mainframe expanded storage · 12
Z/Architecture → Architecture, Central Storage, Expanded Storage, IBM, IBM System/360, Initially, It, KB, Similarly, This, Traditionally, When
related to Control registers · 11
Z/Architecture → Architecture, Because, CPU, ESA/390, For, IBM S/390, Operation, Principles, PSW, The, They
related to Floating-point registers · 11
Z/Architecture → Architecture, Double, Each CPU, Extended, FP, FP0, Hexadecimal, Ignoring, Single, System/360E Single, VR0
related to Vector facility · 10
Z/Architecture → Architecture, Architecture Principles, ES/9000, IBM, It, Operation, Packed SIMD, SIMD, The, Vector Facility
related to Prefix register · 7
Z/Architecture → Architecture, Bits, If, In, KiB, PSA, The
related to Features · 6
Z/Architecture → Among, Architecture, ESA/390, For, Operation, Principles
related to Address encoding · 5
Z/Architecture → AR, Architecture, As, Depending, ESA
related to Memory · 5
Z/Architecture → Architecture, Expanded Storage, IBM, Main, Main Storage

Important terminology Word statistics

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Important terminology

architecture ibm storage esa system address expanded data 64-bit memory instructions register bits instruction facility registers vector mvpg 16 introduced

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Z/ArchitectureBits64-bit1.00infobox
Z/ArchitectureBranchingCondition code, indexing, counting1.00infobox
Z/ArchitectureDesignCISC1.00infobox
Z/ArchitectureDesignerIBM1.00infobox
Z/ArchitectureEncodingVariable (2, 4 or 6 bytes long)1.00infobox
Z/ArchitectureEndiannessBig1.00infobox
Z/ArchitectureFloating-point16× 64-bit (hexadecimal and IEEE binary; IEEE decimal starting with IBM System z9)1.00infobox
Z/ArchitectureGeneral-purpose16× 64-bit1.00infobox
Z/ArchitectureIntroduced2000; 26 years ago (2000)1.00infobox
Z/ArchitecturePredecessorESA/3901.00infobox
Z/ArchitectureTypeRegister–Register Register–Memory Memory–Memory1.00infobox
Z/ArchitectureVector32× 128-bit, VR0–VR15 contain FPR0–FPR151.00infobox
Z/ArchitectureVersionARCHLVL 2 and ARCHLVL 3 (2008)1.00infobox

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