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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. Subsequent 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, IBM Z#IBM z16, z16, and IBM Z#IBM z17, z17. 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Status Register
A status register, flag register, or condition code register (CCR) is a collection of status Flag (computing), flag bits for a Central processing unit, processor. Examples of such registers include FLAGS register (computing), FLAGS register in the x86 architecture, flags in the program status word (PSW) register in the IBM System/360 architecture through z/Architecture, and the application program status register (APSR) in the ARM Cortex-A architecture. The status register is a hardware register that contains information about the state of the Central processing unit, processor. Individual bits are implicitly or explicitly read and/or written by the machine code instructions executing on the processor. The status register lets an instruction take action contingent on the outcome of a previous instruction. Typically, flags in the status register are modified as effects of arithmetic and bit manipulation operations. For example, a Z bit may be set if the result of the operation is ze ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |