Memory Mapping In 8085
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Memory Mapping In 8085
My question is, why is rom always mapped to a lower region of memory map in the 8085 microprocessor? The memory address space of the 8085 takes values from 0000h to ffffh. We can connect the rd’ or wr’ lines from the microprocessor to the coprresponding rd’ and wr’ pins of the memory ic.
The output device can be connected. Thus, we can say that 8085 can support a memory chip of size up to 64 kb. It starts program execution with the next address field.
The flow of an instruction cycle in 8085 architecture :
8085 memory organization 8085 has 16 address lines, so it can address up to 64kb of memory. Memory and i/o have separate address space. Port mapped i/o uses a separate, dedicated address space and is accessed via a dedicated set of microprocessor instructions. Data is transferred only between the accumulator and i.o port.
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