Assignment 2, due Jan 31

On every assignment, write your name legibly as it appears on your University ID card! Homework is due on paper at the start of class on the day indicated (usually Friday). Exceptions will be made only by advance arrangement (excepting "acts of God"). Late work must be turned in to the TA's mailbox (ask the CS receptionist in 14 MLH for help). Never push homework under someone's door!

1. Background: The following SMAL code, if assembled and then packed into the Hawk memory, can be interpreted as an ASCII character string:

           W       #756E614A
           H       8#071141
           B       4#1321
           B       4#0201
   

   a) Convert the operand on each of the above SMAL directives to binary, using correct SMAL syntax for binary numbers. (0.5 points)

   b) Convert it to an equivalent series of 8 SMAL B (byte) directives, one per byte, expressing the value of each byte in binary. Warning: Check the first sections of Chapter 3 to get this right. (0.5 points)

   c) Convert the result of part B to a single SMAL ASCII directive. Hint: The character string is readable English. (0.5 points)

2. Background: Express each of the following decimal numbers as an 8-bit two's complement binary number. (0.1 point each)

   a) –100

   b) +100

   c) –1

   d) +50

   e) –75

3. Background: Express each of the following decimal numbers as an 8-bit one's complement binary number. (0.1 point each)

   a) –99

   b) +99

   c) –0

   d) +49

   e) –74

4. Background: Compute the 2's complement of each of the 8-bit binary numbers given here, and express that as a positive decimal number. (0.1 point each)

   a) 01011101

   b) 11100010

   c) 01101010

   d) 11110011

   e) 01111011