Search Results for: Direct Memory Access

Features of Microprocessor 8257 DMA Controller

Features of Microprocessor 8257 DMA Controller: The Features of Microprocessor 8257 DMA Controller are follows, 1. It is a programmable; 4-channel, direct memory access controller. Each channel can be programmed individually. Therefore, we can interface 4 input/output devices with 8257. 2. Each channel includes a 16-bit DMA address register and a 14-bit counter. DMA address …

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8257 DMA Controller

8257 DMA Controller: In microprocessor based systems data transfer can be controlled by either software or hardware. Upto this point we have used program instructions to transfer data from I/O device to memory or from memory to I/O device. To transfer data by 8257 DMA Controller method microprocessor has to do following tasks : To …

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Pentium Pro, Pentium II and Pentium III Processors

Pentium Pro, Pentium II and Pentium III Processors: Pentium Pro The Pentium Pro is a sixth-generation x86 microprocessor and it was introduced by Intel in 1995. This processor was developed based on the P6 micro-architecture. The Pentium and Pentium MMX processors have 3.1 and 4.5 million transistors respectively, but the Pentium Pro consists of 5.5 …

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