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Memory mapped buses helps in the extension of the address of the physical ram through which the devices can access the address
Memory mapped IO is one where the processor and the IO device share the same memory location(memory) while IO mapped IO is one where the processor and the IO device have different memory located to each other.
In memory mapped I/O, a chunk of the CPU's address space is reserved for accessing I/O devices. In I/O mapped I/O, I/O devices are handled distinctly by the CPU and hence occupy a separate chunk of addresses predetermined by the CPU for I/O. In case of Memory mapped I/O the same address BUS is used for accessing both Memory (RAM) and the Registers of I/O devices. For I/O Mapped I/O, separate address BUS is used. As Address space is generally larger for Memory than I/O registers, the length of I/O address is larger in case of Memory Mapped I/O. For a system which uses I/O Mapped I/O, there is a requirement for a extra h/w Circuitry.
the height of a mountain is mapped by a helicopter and a laser
i mapped the areas to go on a vacation
We Mapped the World was created on 2010-04-05.
As a verb. The terrain has been mapped for the upcoming incursion.
Peripheral-Mapped IO is IO that is selected when the IO/M- line is high.
We traveled across Europe, but our route was mapped out before we left home
Peripheral-Mapped IO is IO that is selected when the IO/M- line is high.
the discovery that the human lymphatic system can be mapped with radioactive dyes, and that the lymph node(s) closest to a tumor serve to filter and trap cancer cells.
More then 390 miles of passageways have been mapped.