11) What will be the value of BX after the following instructions execute? mov bx, 91BAh and bx, 92h
11) What will be the value of BX after the following instructions execute? mov bx, 91BAh and bx, 92h
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:### Question 11) What will be the value of BX after the following instructions execute?
```assembly
mov bx, 91BAh
and bx, 92h
```
### Analysis
To determine the result of these instructions, let's break them down step-by-step.
1. **First Instruction: `mov bx, 91BAh`**
- This instruction moves the hexadecimal value `91BAh` into the BX register.
Let's convert `91BAh` to binary to understand its bits:
```
91BAh (hex) = 1001 0001 1011 1010b (binary)
1 0 1 0
1001 0001 1011 1010
```
2. **Second Instruction: `and bx, 92h`**
- This instruction performs a bitwise AND operation between the current value in BX and `92h`.
Let's convert `92h` to binary:
```
92h (hex) = 1001 0010b (binary)
1 0 0 1
1001 0010
```
To perform the AND operation, we'll align both binary values:
```
1001 0001 1011 1010 (91BAh)
AND 1001 0010 (92h)
-----------------
0000 0010 (result)
```
3. **Final Result:**
- After performing the bitwise AND operation, the resulting value in BX is `2h`.
### Conclusion
The value of BX after executing the given instructions will be `2h`.
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