HW4-3750

HW4-3750 - 1 EE 3750 Homework 4 due Wed., April 14, 2004...

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1 EE 3750 — Homework 4 due Wed., April 14, 2004 For all problems: state any assumptions made; include comments as needed to make assembly instruction sequences clear. 1. (a) Brey, Chapter 9, Problem 11 - When does ALE float to its high-impedance state? (b) Brey, Chapter 9, Problem 27 - What 8086/8088 signal is used to select the direction of the data flows through the 74LS245 bi-directional bus buffer? 2. Let SWIPE be a word array holding 160 signed integers. Write an 8086 instruction sequence to use program-controlled I/O to output the words with value at least 3000. (If a word has value less than 3000, then do not output it.) Let DEVOUT denote the output device. The status port for DEVOUT is a byte port at address 2D9CH; bit 2 is the ready bit. The data port for DEVOUT is a word port at address 2D9EH. 3. Write an 8086 instruction sequence to input arrays low and high , then compute and output the S+P transform of those arrays using program-controlled I/O. (Homework 3, Problem 4 described this transform.) The program will operate as part of an embedded image processing
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This note was uploaded on 01/25/2012 for the course EE 3750 taught by Professor Desouza during the Fall '08 term at LSU.

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HW4-3750 - 1 EE 3750 Homework 4 due Wed., April 14, 2004...

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