Homework_8 - Computer Science and Engineering 331 Computer...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Computer Science and Engineering 331 Computer Organization and Design Spring 200 8 Homework #8: Test Memory Mapped I/O of SPIM Pair programming assignment 1. (6 points) Study and understand the assembly file tt.io.s and then run it on SPIM (version 7.0 and up). As you can see, this file contains both a main program to test the memory mapped I/O of SPIM and an interrupt (trap) handler. At the beginning, the prompt asks the user to input six lines. The main program uses polling to echo the first three lines to SPIM’s console (the ‘terminal’ of virtual machine SPIM) and then enables interrupts and let the interrupt handler to echo the next three lines. Determine how many times the interrupt (trap) handler is invoked if the six input lines are: computer organization design cse 331 SPIM What is the relationship between this number and the number of the characters in the last three lines, i.e., 10 (>, < or =)? Why? (You might want to add your own code to tt.io.s to keep count.) Include the answers to Question 1 as comments at the beginning of the file you submit (through
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/30/2008 for the course CMPEN 331 taught by Professor Bhat during the Spring '08 term at Pennsylvania State University, University Park.

Page1 / 2

Homework_8 - Computer Science and Engineering 331 Computer...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online