Reference no: EM132914673

Question 1. Three contiguous bytes in memory contain the hexadecimal value 1ACCAD in the little-endian format. Assume the bytes are stored from memory address 0700h in increasing order.

With the help of diagrams, use the given bytes to differentiate big endian from small endian format [10]

Question 2. The instruction set for a simple processor is given in Table below

STOP		Stop execution
LOAD	x	load operand (immediate or memory location) into AC
STORE	x	Store contents of AC in memory location x
MOVAC		Copy contents of AC to DR
MOVE		Copy contents of DR to AC
ADD		Add DR to AC
SUB		Subtract DR from AC
DEC		Decrement AC by 1
INC		Increment AC by 1
AND		Logically AND bitwise DR to AC
NOT		Complement contents of AC
BRA	addr	Jump to instruction with address addr
BZ	addr	Jump to instruction addr if AC= 0
BN	addr	Jump to instruction addr if AC ≤ 0

Using the instruction set of the simple processor. Write an assembly language for the simple processor that implements the following algorithm
k= 0
k= k+3
WHILE k> 0 DO
k = k-1
END DO

3. Describe information stored on the stack frame related to each function CALL

4. Define the following terms as they are used in the interrupt system. Where necessary give an example
a. Interrupt service routine
b. Hardware interrupt
c. Software interrupt
d. Exception
e. Non maskable interrupt

5. Write a program using stack based CPU to implement the expression: Y = A*B-(A+C*B)