Exam 1 Form A Solutions

# Exam 1 Form A Solutions - EE319K Spring 2011 Exam 1A...

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EE319K Spring 2011 Exam 1A Solution Page 1 Jonathan W. Valvano February 25, 2011 2:00pm-2:50pm (4) Question 1. The basis elements are 1000=27, 0100=9, 0010=3, and 0001=1* 27+2*9+0*3+1=46 (3) Question 2. Answer true/false for each of the following three statements Part a) False, Flash EEPROM memory on the 9S12 is nonvolatile. Part b) True, the order in which I add the numbers does affect the final value of the carry bit. Part c) True, dropout error can occur on a logical right shift (e.g., lsra ). Overflow can occur. (4) Question 3. Consider ldab #-100 subb #50 Convert to signed (done), Subtract two signed -100 - 50 is -150. Does not fit, so V=1. Convert to unsigned -100 = -100+256 = 156. Subtract unsigned 156-50 is -106. This fits, so C=0. (4) Question 4. What is the binary representation of 8-bit signed number -10? Method 1) +10 is 8+2 or 00001010. Negative is 2’s complement. Complement 1111,0101, then add 1. 11110110 Method 2) Look at basis elements, need -128,64,32,16,4,2, so 11110110

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Exam 1 Form A Solutions - EE319K Spring 2011 Exam 1A...

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