1. A digital computer has a memory unit with 16 bits per word. The instruction set consists of 122 different operations. All instructions have an operation code part (opcode) and an address part (allowing for only one address). Each instruction is stored in one word of memory. [11 marks]

a. How many bits are needed for the opcode? [3 marks]

b. How many bits are left for the address part of the instruction? [3 marks]

c. What is the maximum allowable size for memory? [2 marks]

d. What is the largest unsigned binary number that can be accommodated in one word of memory? [3 marks]

2. Consider the MARIE program below. [9 marks]

a. List the hexadecimal code for each instruction. [3 marks]

Hex

Addr Label Instruction

100 Start, Load A

101 Add B

102 Store Temp

103 Load C

104 Add D

105 Add Temp

106 Store F

107 Output

108 HALT

109 A DEC 5

10A B DEC 3

10B C DEC 4

10C D DEC 13

10D E DEC 3

10E Temp HEX 00FD

10F F HEX 00FE

c. 3. Choose one area of rapid technological change in IT or Computer Science, research and report on recent developments and the outlook for the future in the area that you have chosen. You will need to provide both in text citations and bibliography entries according to Faculty of Business policy (APA format). Your report should be around 500 words. [10 marks]