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When writing to memory, the CPU writes data from MDR to the memory location whose address is stored in MAR. MAR, which is found inside the CPU, goes either to the RAM (random-access memory) or cache. The MAR register is half of a minimal interface between a microprogram and computer storage; the other half is a MDR.
The memory data register is half of a minimal interface between a microprogram and computer storage; the other half is a memory address register (MAR). During the read/write phase, the Control Unit generates control signals that direct the memory controller to fetch or store data.
PC Card is a parallel peripheral interface for laptop computers and PDAs. [1] The PCMCIA originally introduced the 16-bit ISA-based PCMCIA Card in 1990, but renamed it to PC Card in March 1995 to avoid confusion with the name of the organization. [2]
An instruction set architecture (ISA) is an abstract model of a computer, also referred to as computer architecture.A realization of an ISA is called an implementation.An ISA permits multiple implementations that may vary in performance, physical size, and monetary cost (among other things); because the ISA serves as the interface between software and hardware.
The PC-9800 series [3], commonly shortened to PC-98 or simply 98 (キューハチ, Kyū-hachi), [4] is a lineup of Japanese 16-bit and 32-bit personal computers manufactured by NEC from 1982 to 2003. [1] While based on Intel processors, it uses an in-house architecture making it incompatible with IBM clones; some PC-98 computers used NEC's own ...
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Building a computer at home is generally considered a cost-effective alternative to buying a pre-built one because it excludes the assembly labor cost. However, the total cost of building a computer can vary based on an individual's budget, the quality and availability of the parts used, and the discounts offered by mass production.