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Why increment INR instruction in 8085 does not affect carry flag?
INR affect the carry flag.
What is jump on carry in 8085?
Jump on Carry is simply a "JUMP" instruction which will transfer the control to some specific location if carry flag is set. For Example: JC 2004H This instruction will take the control to address location 2004H if carry flag is set.
What is the purpose of adc instruction according to 8085 microprocessor?
this instruction is used to add the specified register content to that of the accumulator along with the carry flag value. this instruction is used in processes which involve continuous addition.
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 do you clear carry flag in 8085?
You can clear carry by using these two commands STC // it will force to set the carry flag CF=1// CMC //it willl complement that carry and you have done, CF=0 // in single instruction u can reset carry by using any logical instruction. because logical operation resets carry always... eg. XRI 00h or ANI 0F Geniusminds.com
If the accumulator has C5H from a previous instruction and the carry flag is set then what will be the contents of the accumulator and carry flag after executing the instruction ADI 94H?
If you add 94H to C5H with the ADI instruction, the result in the accumulator will be 59H and the carry flag will be set. It does not matter what value the carry flag had to start with, because you said ADI, instead of ACI. (For ACI, the result would be 5AH with carry set.)
What are the uses of Auxiliary Carry flag?
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.
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.
Will DCX instruction affect the zero flag?
no....it does not aff
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.
Which flags are checked after instruction JNC and JNZ?
JNC is Jump No-Carry, so the carry flag is checked. JNZ is Jump No-Zero, so the zero flag is checked.
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.
