Addressing Modes and Effective Address

Question

minyoung.han.127 0 Newbie Poster

10 Years Ago

Consider a computer that has a number of registers such that the three registers R0 = 1500, R1 = 4500, and R2 = 1000. Show the effective address of memory and the registers’ contents in each of the following instructions (assume that all numbers are decimal).

(a) ADD (R0)+, R2
(b) SUBTRACT - (R1), R2
(c) MOVE 500(R0), R2
(d) LOAD #5000, R2
(e) STORE R0, 100(R2)

**I can get the register contents but I don't know how to get the effective address??

assembly

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Assembly Guy 72 Posting Whiz · Answer 1 · 2013-09-30T07:08:55+00:00

See http://stackoverflow.com/questions/1699748/what-is-the-difference-between-mov-and-lea#answer-1699778 for information on the difference between a value and effective address.