IO AND MEMORY INTERFACE
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Control bus
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Address bus
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Data bus
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either address bus or data bus
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Detailed explanation-1: -Explanation: The bits in a selected location are accessible using data bus. Explanation: For n memory locations, log n(to the base of 2) address lines are required. For addressing 4K bytes of memory, 12 address lines are required since log(4KB) =log(4*1024)=log(212)=12.
Detailed explanation-2: -Explanation: In case of subroutines or interrupt service routines, the number of instructions executed by the processor depends on the length of procedure (or subroutine) or length of interrupt service routine along with the main calling program.
Detailed explanation-3: -A context switch is the process of storing and restoring state (the context) of a CPU, so that execution can be resumed from the same point at a later time. When it is generated, the processor saves its execution state via a context switch, and begins executing the interrupt handler at the interrupt vector.