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HW#5_Sol - of ACCA and ACCB 6.1 ACCD X Y SP PC DAR Note the...

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EE 367 Introduction to Microprocessors (Fall 2011) Solution Set, Homework 5 4.16, a) 2^8 = 256 different instructions. b) 2^16 = 65,536 different memory addresses. c) 65,536 different 24-bit words in memory. 4.22, The Opcode tells the MPU if additional fetches are needed for the operand portion of instruction. 4.23, Two. Accumulator A(ACCA) and Accumulator B(ACCB). Accumulator D(ACCD) can also be considered though it is made
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Unformatted text preview: of ACCA and ACCB. 6.1, ACCD, X, Y, SP, PC, DAR Note: the internal registers include all of the Programmers Model registers, plus registers needed for processor operation (such as DAR). 6.2, The differences between registers B and D are that B is 8-bit and D is 16-bit. Also, Reg B is the lower byte of Reg D....
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