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What is the importance of flags in microprocessor?
sign flag parity flag zero flag
What are the various flags used in 8085?
there are 5 flags of intel 8085 are: Carry flag(CY), parity flag(P), Auxiliary Carry flag(AC), Zero Flag(Z), Sign flag(S).
Show the bit positions of various flags in 8085 flag register?
The 8085 microprocessor has 5 flags: 1. Zero flag: The zero flag is set, when the ALU operation results a zero . 2. Carry flag: If an arithmetic operations results in a carry, this flag is set. 3. Parity flag: This flag is set, when an arithmetic or logical operation results in a data, which has even number of 1s. If otherwise, it is reset. 4. Sign flag: After the execution of an arithmetic or logic operations, if D7 bit of the accumulator is 1, it indicates a negative number and this flag is set. If otherwise, it is reset. 5. Auxiliary Carry flag: used for BCD Operations, During the BCD operations, if D3 bit producing the carry then the AC bit set as1, otherwise the bit is 0. 6. Carry Flag: when a carry is generated by digit D7, then the carry flag set as 1, otherwise the bit will be 0.
Explain different types of flags in 8085 microprocessor?
Flags are microprocessor dependent. ie flags are different for different microprocessors. Flag represents the status ( & Type) of the operation performed. Ex: In terms of 8085 we have 5 flags : Zero, Carry, Ac Carry, Parity, Sign Flag register is of 8 bits in this case. These flags can also be used for logic implementation.
Conditional call and unconditional call all condition of 8085 microprocessor?
Calls Which are based on conditions like flag status are called conditional flags ex:cc(Call if carry) cz(Call if zero) Calls Which are independent of any kind of conditions, are called unconditional call Ex:Call 2030
What Is The Flags Signals In Microprocessor?
Microprocessors are equipped with flags which are used for letting one know some information such as for instance whether the result of any operaton was positive or negative,the result contains the even parity bits or odd,whether carry bits are generated or not.all these help the programmer out in performing further opertaions.different microprocessors contain different types and differnet number of flags.for instance INTEL 8085 contains 5 flags. AUX CARRY FLAG,ZERO FLAG,SIGN FLAG,PARITY FLAG,CARRY FLAG Anand bhat(mca@kiit-870024)
Ora a is executed in intel 8085 microprocessor?
The ORA A instruction does not change the contents of the accumulator. It does, however, set flags to indicate something about the value of the accumulator. In particular, Z means the result is zero, N means it is negative, and P means it has an odd number of ones.
How many flag registers are there in 8085?
We have only one flag register of 8 bits. Bits description is as follows (Assuming D0=LSB & D7=MSB) D7=Sign Bit. D6= Zero Flag D4= Auxiliary Carry Flag D2 = Parity Flag D0= Carry Flag.
Explain 8086 flag register?
FLAGS REGISTER="h2headingh3"style="color:rgb(0,0,0);"name="flags_register">Flags Register - determines the current state of the processor. They are modified automatically by CPU after mathematical operations and allow one to determine the type of the result as well as determine conditions to transfer control to other parts of the program. Generally you cannot access these registers directly.Carry Flag (CF) - this flag is set to 1 when there is an unsigned overflow. For example when you add bytes 255 + 1 (result is not in range 0...255). When there is no overflow this flag is set to 0.Parity Flag (PF) - this flag is set to 1 when there is even number of one bits in result, and to 0 when there is odd number of one bits.Auxiliary Flag (AF) - set to 1 when there is an unsigned overflow for low nibble (4 bits).Zero Flag (ZF) - set to 1 when result is zero. For non-zero result this flag is set to 0.Sign Flag (SF) - set to 1 when result is negative. When result is positive it is set to 0. (This flag takes the value of the most significant bit.)Trap Flag (TF) - Used for on-chip debugging.Interrupt enable Flag (IF) - when this flag is set to 1 CPU reacts to interrupts from external devices.Direction Flag (DF) - this flag is used by some instructions to process data chains, when this flag is set to 0 - the processing is done forward, when this flag is set to 1 the processing is done backward.Overflow Flag (OF) - set to 1 when there is a signed overflow. For example, when you add bytes 100 + 50 (result is not in range -128...127).
What are the instruction for make content of accummulator zero in 8085?
Sub a ani 00h xra a
When was Raising the Flag at Ground Zero created?
Raising the Flag at Ground Zero was created in 2001.
What is meant by flag is set or not set in 8085 processor?
The flags are testable conditions that are set after many arithmetic or logical instructions to indicate something about the result of the result. For instance, the Z flag means the result is zero, the N flag means it is negative, the O flag means a signed overflow occurred, the C flag means an unsigned overflow occurred, and the P flag means an even number of bits is set in the result. You can use the various flag testable jump instructions, such as JZ or JNZ to test the flag after performing an operation that sets or resets the flag.
