HW1_soln

HW1_soln - EE 3750 HW 1 solutions 1 EE 3750 Homework 1...

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EE 3750 — HW 1 solutions 1 EE 3750 — Homework 1 solutions Fall 2009 1. (a) Let the effective address of variable blue be 42EH and let DS = 2A50H. What is the corresponding physical address of blue , assuming real mode operation? (b) Let the physical address of variable gold be 9B491H and let the effective address of gold be 2171H. What are the corresponding contents of DS, assuming real mode operation? (c) Assume protected mode operation. Let the effective address of variable tan be 2E04H and let the base value in the descriptor to which DS points be 67C000H. What is the corresponding physical address of tan ? All values are given in hex. (a) DS shifted by 4 bits = 2A500 EA = + 42E PA = 2A92E (b) PA = 9B491 EA = 2171 DS shifted by 4 bits = 99320 DS = 9932 (c) base address = 67C000 EA = + 2E04 PA = 67EE04 2. Explain the sequence of operations performed by the 8086 while executing the instruction ADD CH, [BX+DI] . (Be sure to include generation of effective and physical memory address and what happens to both the source and destination operands.)
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HW1_soln - EE 3750 HW 1 solutions 1 EE 3750 Homework 1...

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