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The Auxiliary Carry flag of the Intel 8085 is used to store the carry/borrow from the least significant 4 bits of an 8 bit arithmetic operation. This bit (and the Carry flag from the most significant 4 bits) is needed by the Decimal Adjust Accumulator instruction to convert the result of the 8 bit arithmetic operation to correct 2 digit Binary Coded Decimal format.
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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).
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.
What is the use of AC Flag in 8085?
The Auxiliary Carry (AC) flag in the 8085 indicates a carry out of the low order 4 bits of an operation, more specifically that the low order 4 bits are greater than 9 (10012). The AC flag can thus be used to facilitate decimal arithmetic.
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.
What is psw of 8086?
Flag Register (PSW)Status is indicated with individual bits: 0 - CF - Carry Flag2 - PF - Parity Flag4 - AF - Auxiliary carry Flag6 - ZF - Zero Flag7 - SF - Sign Flag8 - TF - Trap Flag9 - IF - Interrupt Flag10 - DF - Direcetion Flag11 - OF - Overflow Flag
When will be the carry flag set?
if the result of an arithmetic operation, consists a carry then the carry flag is set
What is the Difference between Carry and auxiliary carry?
The carry flag indicates a carry or borrow resulting from an operation. You can use it to build multi-precision representations. The auxillary carry is very much the same, except it indicates a decimal carry or borrow, useful when representing BCD digits, and can then be used in the various "adjust for addition", etc. type of instructions. (DAA, AAA, etc.)
What is the 3 auxiliary verbs of the simple future tense?
The future tense uses the auxiliary verb will.
What is the tense of enter that uses an auxiliary verb?
Present perfect tense:Subject + Auxiliary Verb "have" + Past ParticipleI have entered.
Why increment INR instruction in 8085 does not affect carry flag?
INR affect the carry flag.
How much fuel can you carry in an auxiliary fuel tank?
30 gallons
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.
