Semiconductor & Computer Engineering
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| − | {{title|z/Architecture}} | + | {{ibm title|z/Architecture}} |
'''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}}. | ||
== Overview == | == Overview == | ||
| − | The z/Architecture was introduced in 2000 with the introduction of the {{ibm|zSeries 900 | + | 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 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]]. |
{{expand section}} | {{expand section}} | ||