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The IBM z13 is the last z Systems server to support running an operating system in ESA/390 architecture mode. [2] However, all 24-bit and 31-bit problem-state application programs originally written to run on the ESA/390 architecture will be unaffected by this change.
IBM Z is the family name for all of IBM's z/Architecture mainframe computers, from the latest z17 to the classic System/360. Learn about the evolution, features, and virtualization of IBM Z systems, as well as the list of models and their specifications.
Out-of-order execution is a computer engineering paradigm that allows processors to execute instructions in an order governed by data and units availability, rather than by their original order. Learn about its history, benefits, challenges, and examples.
Learn about the structure and design of computer systems, from the earliest concepts to the modern technologies. Explore the subcategories, roles, and examples of computer architecture, such as instruction set architecture, microarchitecture, and systems design.
Tomasulo's algorithm is a hardware algorithm that allows out-of-order execution and improves parallelism of instructions. It uses register renaming, reservation stations, common data bus, and instruction lifecycle stages to avoid hazards and exceptions.
Amdahl's law is a formula that limits the theoretical speedup of a task by the fraction of time that cannot be parallelized. Learn the definition, derivation, examples and applications of Amdahl's law in computer architecture and parallel computing.
The Pick Operating System, also known as the Pick System or simply Pick, [1] is a demand-paged, multi-user, virtual memory, time-sharing computer operating system based around a MultiValue database. Pick is used primarily for business data processing. It is named after one of its developers, Dick Pick. [2] [3]
A control loop is a fundamental building block of control systems that consists of a process sensor, a controller function, and a final control element. Learn the difference between open loop and closed loop systems, and see examples of applications and diagrams.