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'''z/Architecture''' is a {{arch|64}} [[big-endian]] [[instruction set architecture]] introduced by [[IBM]] in October [[2000]] as an extension and successor to the IBM {{ibm|ESA/390}}.
 
'''z/Architecture''' is a {{arch|64}} [[big-endian]] [[instruction set architecture]] introduced by [[IBM]] in October [[2000]] as an extension and successor to the IBM {{ibm|ESA/390}}.
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== Overview ==
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The z/Architecture was introduced in 2000 with the introduction of the {{ibm|zSeries 900}}. The ISA was designed as an extension to the {{ibm|ESA/390}} and features 64-bit registers, 64-bit operations, and a 64-bit virtual and real address space. Development for z/Architecture started in 1996 when IBM determined the ESA/390 had to be extended to 64-bit to overcome its limitations. The new architecture increased the 31-bit address to 64 bit, enough to address 16 [[exbibytes]].
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Latest revision as of 14:16, 29 January 2018

z/Architecture is a 64-bit big-endian instruction set architecture introduced by IBM in October 2000 as an extension and successor to the IBM ESA/390.

Overview[edit]

The z/Architecture was introduced in 2000 with the introduction of the zSeries 900. The ISA was designed as an extension to the ESA/390 and features 64-bit registers, 64-bit operations, and a 64-bit virtual and real address space. Development for z/Architecture started in 1996 when IBM determined the ESA/390 had to be extended to 64-bit to overcome its limitations. The new architecture increased the 31-bit address to 64 bit, enough to address 16 exbibytes.

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