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When can a user program execution be interrupted?
It won't be desirable to interrupt a program when an instruction is being executed and is in a state such as instruction decode. The most desirable place for program interruption will be when it has completed the prior instruction and is about to begin a new instruction. Figure below shows instruction execution cycle with interrupt cycle where interrupt situation is acknowledged. Please remember that even interrupt service routine is also a program and after recognizing interrupt next instruction executed by instruction cycle is first instruction of ISR (interrupt servicing routine).
Name the switching schemes used in a digital exchange? The several switching systems used are: 1. Strowger Switching System 2. Cross bar Switching. 3. Electronic Swit
What is the point of the REPLACING option of a copy statement? Ans) REPLACING permits for the similar copy to be used more than once in the similar code by changing the replac
Q. What are common reason for error massages while copying file? While copying files with copy, DOS in encounters any error, it displays a suitable error massage. The common re
Subtraction of 01000-01001 using 2's complement method. Ans. Firstly 1's complement of 01001 is 10110 and 2's complement is 10110+ 1 =10111. Thus 01000 = 01000 - 01001
Define EMS The area at location C8000H-DFFFFFH is often free oropen. This area is used for the expanded memory system in a XT or PC system, or for the upper memory system in an
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Write a short note on structure chart. Structure Chart is an significant program design method and it shows all components of code in a hierarchical format
prevention of boiler troubles
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