Electronics and Communication Engineering - Microprocessors - Discussion
Discussion Forum : Microprocessors - Section 1 (Q.No. 7)
7.
To multiply a number by 8 in 8085 we have to use
RAL instructionAnswer: Option
Explanation:
When RAL instruction is used once the number is doubled.
Discussion:
20 comments Page 1 of 2.
Navya said:
1 decade ago
Sir,
Can you explain what is RAL?
Can you explain what is RAL?
K.Supriya said:
1 decade ago
Sir, Please explain this RAL ?
Alpesh said:
1 decade ago
Sir, What is the RAL?
Kaushik R said:
1 decade ago
RAL means rotate accumulator to left with carry.
Sambhji said:
1 decade ago
How answer is thrice, can you explain?
Saurabh said:
1 decade ago
There is no multiplication instruction in the 8085.
These operations are equivalent to multiplying by 2:
1) Shift left by 1 (shifting left by n is multiplying by 2^n).
2) Add the value to itself once.
So 2^3 = 8.
These operations are equivalent to multiplying by 2:
1) Shift left by 1 (shifting left by n is multiplying by 2^n).
2) Add the value to itself once.
So 2^3 = 8.
Khan. said:
9 years ago
Sir, not understand this. Please explain me in detail.
Quant said:
9 years ago
Sir I can't understand please can you explain in a simple way.
Meena said:
9 years ago
The answer is simple.
Let's take a value 0100 ---> 4.
1st time: Just apply left shift operation on that value 01000 ---> 8(4 * 2^1).
2nd time: again do the same thing 010000 ---> 16(4 * 2^2).
3rd time: again left shift the value 0100000 ---> 32(4 * 2^3).
So by doing three times left shift we are getting eight times of that value.
So the answer is thrice.
Let's take a value 0100 ---> 4.
1st time: Just apply left shift operation on that value 01000 ---> 8(4 * 2^1).
2nd time: again do the same thing 010000 ---> 16(4 * 2^2).
3rd time: again left shift the value 0100000 ---> 32(4 * 2^3).
So by doing three times left shift we are getting eight times of that value.
So the answer is thrice.
(1)
Sagar prajapat said:
9 years ago
Please understand;
1<<1=2 0001<<1= 0010.
1<<2=4 0001<<2= 0100.
1<<3=8 0001<<3= 1000.
1<<1=2 0001<<1= 0010.
1<<2=4 0001<<2= 0100.
1<<3=8 0001<<3= 1000.
(1)
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