Consider the instruction formats of the basic computer in Fi

Consider the instruction formats of the basic computer in Fig. 5-5 and the list of instructions in Table 5-2. For each of the following 16-bit instructions, give the equivalent 16 bit binary code, write the equivalent RTL statement and find the final binary value of the destination when the instruction is executed. All values are given in hexadecimals and M=memory. Complete the following tables using the instruction: C450, where, M[450]=0890, and M[890]= AF02. Complete the following tables using the instruction: 4450, where M[450]= 0990 7040, where AC=5007 and E=0

Solution

a)
Given Instruction is :

Hexadecimal : C450
Instruction(binary): 1100 0100 0101 0000 contains
Instruction RTL : M[450] <- R1 ;(consider C450)
So, xor operation between these two locations..
0000 1001 1000 0000 = 0890
1100 0100 0101 0000 = C450
----------------------------------
1100 1101 1101 0000 = cDD0
------------------------------------
In Hexadecimal: CDD0
In binary: 1100 1101 1101 0000

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b)
Given data:
Hexadecimal: 4450
Binary instruction: 0100 0100 0101 0000

Instruction: M[450] <- R1 ;consider R1 = 4450H
Performing XOR operation..

0000 1001 1001 0000 ----> 0990
0100 0100 0101 0000 ----> 4450
-----------------------------------
0100 1101 1100 0000 ----> 4DC0

Final answer in
Hexadecimal : 4DC0
Binary: 0100 1101 1100 0000

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(c)
Given data
Hexadecimal : 7040
Binary: 0111 0000 0100 0000

RTL instruction
Ac <- 7040
Accumulator operation, so addition performing
0101 0000 0000 0111 ---> 5007
0111 0000 0100 0000 ---> 7040
----------------------------------
1100 0000 0100 0111 ----> C047
-------------------------------------
Final answer is:
Hexadecimal : C047
Binary : 1100 0000 0100 0111