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Cell microprocessors are multi-core processors that use cellular architecture for high performance distributed computing. The first commercial Cell microprocessor, the Cell BE, was designed for the Sony PlayStation 3. IBM designed the PowerXCell 8i for use in the Roadrunner supercomputer. [1]
Cell, a shorthand for Cell Broadband Engine Architecture, [a] is a 64-bit multi-core microprocessor and microarchitecture that combines a general-purpose PowerPC core of modest performance with streamlined coprocessing elements [2] which greatly accelerate multimedia and vector processing applications, as well as many other forms of dedicated computation.
A control store is the part of a CPU's control unit that stores the CPU's microprogram.It is usually accessed by a microsequencer.A control store implementation whose contents are unalterable is known as a Read Only Memory (ROM) or Read Only Storage (ROS); one whose contents are alterable is known as a Writable Control Store (WCS).
The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor. A CU typically uses a binary decoder to convert coded instructions into timing and control signals that direct the operation of the other units (memory, arithmetic logic unit and input and output devices, etc.).
A confluent cell duplicates the signal onto a length of red wire consisting of special transmission states. The signal passes down this wire and constructs a new cell at the end. This particular signal (1011) codes for an east-directed special transmission state, thus extending the red wire by one cell each time.
It is made up of logically independent control units, but takes up only one of the eight control unit slots which can be connected to a channel. [2]: 8 A two-channel switch is available, allowing the control unit to be connected to two channels, on one or two computer systems, controlled by manual switches or by programming. [2]: 65–66
A UCB is created for each I/O device. The data in the UCB includes the device's unit number (a part of the device name) and a listhead to which pending I/O requests may be queued. The UCB may have a device-driver defined extension in which the driver can keep driver-defined data that is instantiated for each device. [10]
Often, calculating a memory address involves more than one general-purpose machine instruction, which do not necessarily decode and execute quickly. By incorporating an AGU into a CPU design, together with introducing specialized instructions that use the AGU, various address-generation calculations can be offloaded from the rest of the CPU ...