What is the purpose of Zero flag?
Table of Contents
- 1 What is the purpose of Zero flag?
- 2 What is the zero flag in assembly?
- 3 How can reset carry flag in 8085?
- 4 When a zero flag is set and a carry flag is set during an ALU operation of a microprocessor?
- 5 Which flag get set when the result is zero?
- 6 What is the vector address of TF zero flag?
- 7 What is a zero flag in 8085 microprocessor?
- 8 What is ZeroZero flag (Z) in Excel?
What is the purpose of Zero flag?
Along with a carry flag, a sign flag and an overflow flag, the zero flag is used to check the result of an arithmetic operation, including bitwise logical instructions. It is set to 1, or true, if an arithmetic result is zero, and reset otherwise.
What is the zero flag in assembly?
The Zero flag indicates that an operation produced zero. For example, if an operand is subtracted from another of equal value, the Zero flag is set. The Sign flag indicates that an operation produced a negative result. If the most significant bit of the destination operand is set, the Sign flag is set.
Which flag is not present in 8085?
Zero flag
Zero flag is present in 8085 but not in the 8051.
What does a 0 in the zero flag after an arithmetic operation mean?
Zero flag (ZF) – the zero flag is set(1) when the result of an arithmetic operation is zero. Unsigned overflow means there has been a carry out of, or a borrow into, the most significant bit (msb) of the destination operand in an arithmetic operation using unsigned numbers.
How can reset carry flag in 8085?
Unfortunately the 8085 does not have a ‘reset carry’ instruction, but it does have ‘set carry’ and ‘complement carry’. By loading different numbers into the register and/or varying the other instructions you could set or reset flags at will.
When a zero flag is set and a carry flag is set during an ALU operation of a microprocessor?
Zero Flag (Z) The zero flag is set (i.e. becomes 1) when the ALU operation results in 0, and the flag is reset (i.e. becomes 0) if the result is nonzero. This flag is affected by the results in the accumulator as well as in the other registers.
How can I reset zero flag in 8085?
What is the function of trap flag?
A trap flag permits operation of a processor in single-step mode. If such a flag is available, debuggers can use it to step through the execution of a computer program.
Which flag get set when the result is zero?
For example, if the result of an arithmetic operation is zero, the zero flag is set (i.e., ZF = 1).
What is the vector address of TF zero flag?
Introduction
| Interrupt | Flag | Interrupt vector address |
|---|---|---|
| Reset | – | 0000H |
| INT0 (Ext. int. 0) | IE0 | 0003H |
| Timer 0 | TF0 | 000BH |
| INT1 (Ext. int. 1) | IE1 | 0013H |
What is a trap flag used for?
What is the flag register in 8085?
Flag register in 8085 microprocessor. The Flag register is a Special Purpose Register. Depending upon the value of result after any arithmetic and logical operation the flag bits become set (1) or reset (0). In 8085 microprocessor, flag register consists of 8 bits and only 5 of them are useful.
What is a zero flag in 8085 microprocessor?
Answer Wiki. A zero flag is used in 8085 to indicate that the arithmetic or logical operation resulted to a zero. It is located at the 6th bit in flag register.
What is ZeroZero flag (Z) in Excel?
Zero Flag (Z) – After any arithmetical or logical operation if the result is 0 (00)H, the zero flag becomes set i.e. 1, otherwise it becomes reset i.e. 0. 00H zero flag is 1.
What is the meaning of 0 flag in C++?
Flags generally reflect the status of arithmetic and logical operations. Zero flag is set to 1, if the result (all 8 bits) is zero; otherwise it is reset.
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