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Subject Advanced Computer Architecture PART-1 Answer any one full question. Give Flynns classification of various computer architectures. Clearly explain the features of each with conceptual diagrams. (10 Marks) Sol Michael Flynns introduced a classification of various computer architectures based on notions of instruction and data streams. They are SISD (single instruction stream over a single data stream) SIMD (single instruction stream over a multiple data stream) MIMD (multiple instruction stream over a multiple data stream) MISD (multiple instruction stream over a multiple data stream) SISD (single instruction stream over a single data stream) Conventional sequential machines are called SISD computers as shown in Fig 1a. CU control unit PU processing unit IS MU memory unit IS DS IS instruction stream DS data stream I/O Fig 1a SISD Uniprocessor architecture 2. SIMD (single instruction stream over a multiple data stream) Vector computers are equipped with scalar and vector hardware are called SIMD computers as shown in Fig 1b. SIMD Program loaded DS DS From Data sets loaded Host IS IS from host DS DS DS DS PE Processing Elements LM Local Memory Fig 1b SIMD architecture (with distributed memory) MIMD (multiple instruction stream over a multiple data stream) Parallel computers are reserved for MIMD machines is as shown in the Fig 1c. IS IS DS I/O I/O IS DS