DATA2, W DATA4, F 10) MOVF work ANDWF WREG= C Z
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:Please use the following GPR register names and contents when answering the following questions: (let the GPRs be reset to the table values upon entering each question).
| GPR NAME | ADDRESS | CONTENTS (HEX) |
|----------|---------|----------------|
| DATA1 | 01 | 5A |
| DATA2 | 02 | 59 |
| DATA3 | 03 | F9 |
| DATA4 | 04 | DB |
| DATA5 | 05 | 4E |
| CTR1 | 06 | 03 |
| CTR2 | 07 | 02 |

Transcribed Image Text:**Instruction Set Example**:
1. **Instruction**: `MOVF DATA2, W`
- **Explanation**: This instruction moves the content of the register labeled `DATA2` into the WREG (working register).
2. **Instruction**: `ANDWF DATA4, F`
- **Explanation**: This instruction performs a bitwise AND operation between the WREG and the register labeled `DATA4`, storing the result back into `DATA4`.
**Register Overview**:
- **WREG (Working Register)**: The working register is used to store intermediate results and facilitates operations within the instruction set. The current value is not specified in the image.
- **Status Flags (NCZ)**:
- **N (Negative Flag)**: Indicates if the result of the operation is negative.
- **C (Carry Flag)**: Indicates if there is a carry out from the most significant bit during an arithmetic operation.
- **Z (Zero Flag)**: Indicates if the result of an operation is zero.
**Additional Notes**:
- The area labeled "work" appears to be a space for calculations or notes related to the operations.
- The status flags (N, C, Z) help in understanding the outcomes of arithmetic and logic operations, guiding subsequent program decisions.
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