CS 61 - Computer Organization & Assembly Language

Assignment 2 - due via electronic turnin by Saturday August 6, 2005 11pm

This program should be written in LC-3 assembly.

Read in two one-digit decimal numbers from the user and subtract the first from the second, and output the answer as a decimal number and as an 8-bit binary number.

In order to accomplish this, your program must:

• Read both numbers from the console using TRAP instructions
• Convert both numbers into a binary representation
• Negate the first number and add them together
• Output the result as a binary number, determining the value of each bit and outputting either a '0' or a '1'
• Convert the number (including the sign) into a printable decimal number and output the result.

What to turnin

Turn in your source code (the .asm file) making sure that your name, id, and all relevant information is located in a block of comments at the top of the file.