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IBM Mainframe Expanded Storage
z/Architecture, initially and briefly called ESA/390, ESA Modal Extensions (ESAME), is IBM's 64-bit computing, 64-bit complex instruction set computer (CISC) instruction set architecture, implemented by its mainframe computers. IBM introduced its first z/Architecture-based system, the IBM System z#IBM zSeries family, z900, in late 2000. Later z/Architecture systems include the IBM z800, z990, z890, System z9, IBM System z10, System z10, zEnterprise 196, zEnterprise 114, IBM Z#zEnterprise gen2 (zBC12 and zEC12), zEC12, IBM Z#zEnterprise gen2 (zBC12 and zEC12), zBC12, IBM Z#IBM z13, z13, IBM Z#IBM z14, z14, IBM Z#IBM z15, z15 and IBM Z#IBM z16, z16. z/Architecture retains backward compatibility with previous 32-bit-data/31-bit-addressing architecture ESA/390 and its predecessors back to the 32-bit-data/24-bit-addressing System/360. The IBM z13 is the last z Systems server to support running an operating system in ESA/390 architecture mode. However, all 24-bit and 31-bit problem- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ESA/390
The IBM System/390 is a discontinued mainframe product family implementing the ESA/390, the fifth generation of the System/360 instruction set architecture. The first computers to use the ESA/390 were the Enterprise System/9000 (ES/9000) family, which were introduced in 1990. These were followed by the 9672, Multiprise, and Integrated Server families of System/390 in 1994–1999, using CMOS microprocessors. The ESA/390 succeeded the ESA/370 used in the Enhanced 3090 and 4381 "E" models, and the System/370 architecture last used in the IBM 9370 low-end mainframe. The ESA/390 was succeeded by the 64-bit z/Architecture in 2000. History On February 15, 1988, IBM announced Enterprise Systems Architecture/370 (ESA/370) for 3090 enhanced ("E") models and for 4381 model groups 91E and 92E. In additional to the primary and secondary addressing modes that System/370 Extended Architecture (S/370-XA) supports, ESA has an access register mode in which each use of general register ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
