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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
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What is the Difference between memory mapped IO and IO mapped IO?
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.
What is a memory mapped register?
A memory mapped register is a register that has its specific address stored in a known memory location.
Differentiate between memory mapped IO and IO mapped IO?
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.
Graphic images where each pixel is bit-mapped and take up more memory?
Graphic images where each pixel is bit-mapped and take up more memory?
What is the segment of the data bus that connects RAM to the processor?
The usage of "segment" and "data bus" in the question appears inconsistent, and does not completely make sense. If you mean the data segment in the 8086/8088, then this is the region of memory mapped by the Data Segment (DS) register, usually reserved for operands in memory. If you are talking about the 8085, then the question does not make sense at all.
What is the advantage and disadvantage of interrupt in memory mapped IO?
disadvantages of interrupt
Define a system bus in a PC?
The bus between the CPU and memory on the motherboard. Also called the memory bus, front-side bus, local bus, or host bus.
What is the Main Function Of System Bus?
The bus between the CPU and memory on the motherboard. Also called the memory bus, front-side bus, local bus, or host bus.
What are the advantages of memory mapped IO?
Memory mapped IO uses a portion of RAM to handle IO requests. In this manner, instructions the CPU uses for reading and writing memory can also be used for IO, reducing the circuitry needed. This makes the CPU simpler, cheaper and more effecient.
What is system bus?
System bus speed in microprocessors is the speed at which a processor sends/receives data from the motherboard's memory controller. It is also called the Front Side Bus (FSB) speed in the case of Intel CPUs.
What is the functional of a bus?
The bits of address bus inform the memory(Ram) which particular element is to be read or write in memory.
What is memory mapping in microprocessor?
Memory mapping is the technique of assigning specific memory locations to specific capabilities. For example, the stack can be "mapped" or placed in memory (usually towards the high end of memory). The "heap" is often placed just below the stack. Not only are software constructs placed (mapped) into specific locations in memory, but peripherals can be mapped to memory as well. For example, a serial port may have several registers "mapped" into memory at specific locations. The means that if you want to send a message out the serial port, you would perform the same operation as you would writing to memory, except that you would provide the address of the write register of the serial port. In this way, peripherals appear exactly the same as memory. The technique replaces the older "port" access in which peripherals were accessed via a different set of signals. (basically a different address space which was access via the "port" command rather than the memory read/write).
