CS326 Homework #10

CS326 Homework #10 - CS 326/508 Computer Organization and...

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CS 326/508 Computer Organization and Design Spring 2012 Homework #10 Due: May 2, 2012 The document entitled “System Call Codes.pdf” posted in the Course Documents folder on Blackboard explains how basic I/O is accomplished in MIPS. Read this document so that you can use the information to complete this assignment. An example program named “Console IO Subroutine.asm” is provided in the Course Documents folder on Blackboard that demonstrates the programming for using Console I/O, subroutines and the stack in memory. This program is documented throughout with comments explaining what the program is doing. This program can be opened and run in the MARS software and you should do this in preparation for completing the assignment. Currently, the program when run, prompts the user to enter five integers (words) via the console interface. As each integer is input, it is read and placed (pushed) onto the stack in memory.
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Unformatted text preview: When the last integer is input, the program then reads the integer values from the stack (pops) and prints them to the console. You should note that the integers are displayed in reverse order from that entered. This is because the stack is a last-in first-out (LIFO) data structure. For this assignment, modify the program so that instead of handling integers, it works with characters. In other words, accept characters (a, b, c) instead of integers (1, 2, 3). Make all necessary changes to the program so that the characters are correctly read from the console as input, pushed on and popped off the stack, and printed on the console. Turn in: 1. Printed copy of your program. 2. Screen print of the MARS window showing the stack and console. See next page....
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  • Fall '12
  • Pierce
  • Console IO Subroutine.asm

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