Describe information stored on the stack frame

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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)

Reference no: EM132914673

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