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
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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: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 |
**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.
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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