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Q. How many instructions in a Computer?
A computer can have a vast number of instructions and addressing modes. Older computers with the growth of Integrated circuit technology have a very complex and large set of instructions. These are known as 'complex instruction set computers' (CISC). Illustrations of CISC architectures are Digital Equipment Corporation VAX computer and IBM 370 computer.
Though later it was found in studies of program style that many complex instructions found CISC aren't used by program. This lead to the concept of making a simple but faster computer which could execute simple instructions much faster. These computers have registers addressing,simple instructions and move registers. These are known as Reduced Instruction Set Computers (RISC).
When will the current screen processing terminates? A current screen processing terminates when control reaches either a Leave-screen or the end of PAI.
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For executing recursive function the data structure used is: For executing recursive function, stack is used as a data structure.
Question: (a) Describe the importance of Micro-Programming and point out one area where Micro-Programming is extensively used. (b) Below is a diagram of an 8086 processor.
Name two special purpose registers. Index register Stack pointer
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