Unconditional Jump Instruction in 8085 Microprocessor

Arjun Thakur
Updated on 27-Jun-2020 14:45:21

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In 8085 Instruction set, there are a set of jump instructions, which can transfer programcontrol to a certain memory location. So after these branchingmnemonics we shall have to mention 16-bit target address of thelocation. These jump instructions can be divided into two categories– Unconditional jump instructions andConditional jump instructionsHere in this section we shall discuss only the unconditional jump instruction. Tre required mnemonic is JUMP a16. Here in this instruction a16 denotes 16-bit memory location address.This instruction does not depend on the current conditions of theflag bits in the flag register. It is a 3-Byte instruction. The firstByte will contain the ... Read More

Jump If Not Carry (JNC) in 8085 Microprocessor

George John
Updated on 27-Jun-2020 14:45:09

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In 8085 Instruction set, we are having one mnemonic JNC a16, which stands for “Jump if Not Carry” and “a16”stands for any 16-bit address. This instruction is used to jump to the address a16 as provided in the instruction. But as it is a conditional jump so it will happen if and only if the present carry flag value is 0. If carry flag value is 1, program flow continues sequentially. It is a 3-Byte instruction.Mnemonics, OperandOpcode(in HEX)BytesJNCLabelD23Let us consider one example of this instruction type JNC 4000H. It is a 3-Byte instruction. The result of execution of this instruction ... Read More

Conditional Jump Instructions in 8085 Microprocessor

Ankith Reddy
Updated on 27-Jun-2020 14:44:57

4K+ Views

In 8085 Instruction set, there are a set of jump instructions, which can transfer program control to a certain memory location. So after these branching mnemonics, we shall have to mention 16-bit target address of the location. These jump instructions can be divided into two categories– Unconditional jump instructions andConditional jump instructionsHere we shall discuss conditional jump instructions in details. Under conditional Jump instructions, we are having 8 different mnemonics. We know that there are 5 flag bits in 8085 Flag register. They are S, Z, P, Cy, AC. Out of them only on AC flag bit, there is no jump ... Read More

Jump If Carry (JC) in 8085 Microprocessor

Chandu yadav
Updated on 27-Jun-2020 14:43:31

6K+ Views

In 8085 Instruction set, we are having one mnemonic JC a16, which stands for “Jump if Carry” and “a16” stands for any 16-bit address. This instruction is used to jump to the address a16 as provided in the instruction. But as it is a conditional jump so it will happen if and only if the present carry flag value is 1.If carry flag value is 0, program flow continues sequentially. It is a 3-Byte instruction.Mnemonics, OperandOpcode(in HEX)BytesJC LabelDA3Let us consider one example of this instruction type JC 4000H. It is a 3-Byte instruction. The result of execution of this instruction ... Read More

Jump If Not Zero (JNZ) Result in 8085 Microprocessor

George John
Updated on 27-Jun-2020 14:43:01

11K+ Views

In 8085 Instruction set, we are having one mnemonic JNZ a16, which stands for “Jump if Not Zero” and “a16” stands for any 16-bit address. This instruction is used to jump to the address a16 as provided in the instruction. But as it is a conditional jump so it will happen if and only if the present zero flag value is 0. If zero flag value is 1, program flow continues sequentially. It is a 3-Byte instruction.Mnemonics, OperandOpcode(in HEX)BytesJNZLabelC23Let us consider one example of this instruction type JNZ 4000H. It is a 3-Byte instruction. The result of execution of this ... Read More

Jump If Zero (JZ) Result in 8085 Microprocessor

Ankith Reddy
Updated on 27-Jun-2020 14:42:29

3K+ Views

In 8085 Instruction set, we are having one mnemonic JZ a16, which stands for “Jump Zero” and “a16” stands for any 16-bit address. This instruction is used to jump to the address a16 as provided in the instruction. But as it is a conditional jump so it will happen if and only if the present zero flag value is 1. If the zero flag value is 0, program flow continues sequentially. It is a 3-Byte instruction.Mnemonics, OperandOpcode(in HEX)BytesJZ LabelCA3Let us consider one example of this instruction type JZ 4000H. It is a 3-Byte instruction. The result of execution of this instruction ... Read More

Jump if Parity Odd (JPO) in 8085 Microprocessor

Arjun Thakur
Updated on 27-Jun-2020 14:42:13

905 Views

In 8085 Instruction set, we are having one mnemonic JPO a16, which stands for “Jump if Parity Odd” and “a16” stands for any 16-bit address. This instruction is used to jump to the address a16 as provided in the instruction. But as it is a conditional jump so it will happen if and only if the present parity flag value is 0. If parity flag value is 1, program flow continues sequentially. It is a 3-Byte instruction.Mnemonics, OperandOpcode(in HEX)BytesJPO LabelE23Let us consider one example of this instruction type JPO 4000H. It is a 3-Byte instruction. The result of execution of ... Read More

Jump if Parity Even (JPE) in 8085 Microprocessor

Ankith Reddy
Updated on 27-Jun-2020 14:41:43

2K+ Views

In 8085 Instruction set, we are having one mnemonic JPE a16,  which stands for “Jump if Parity Even” and “a16” stands for any 16-bit address. This instruction is used to jump to the address a16 as provided in the instruction. But as it is a conditional jump so it will happen if and only if the present parity flag value is 1. If the parity flag value is 0, program flow continues sequentially. It is a 3-Byte instruction.Mnemonics, OperandOpcode(in HEX)BytesJPE LabelEA3Let us consider one example of this instruction type JPE 4000H. It is a 3-Byte instruction. The result of execution ... Read More

Python Exit Handlers with atexit

Daniol Thomas
Updated on 27-Jun-2020 14:38:59

724 Views

The atexit module in the standard distribution of Python has two functions – register() and unregister(). Both functions take some existing function as an argument. Registered functions are executed automatically when the interpreter session is terminated normally.If more than one functions are registered, their execution is in the reverse order of registration. It means, functions f1(), f2() and f3() are registered one after other, their order of execution will be f3(), f2() and f1().The unregister() function removes the specified function from list of functions to be automatically invoked.Following code shows how a function is registered for automatic execution upon termination ... Read More

Measure Execution Time of Small Python Code Snippets using timeit

Nancy Den
Updated on 27-Jun-2020 14:38:42

268 Views

The Timer class and other convenience functions in timeit module of Python's standard library are designed to provide a mechanism to measure time taken by small bits of Python code to execute. The module has a command line interface and the functions can be called from within program as well.Easiest way to measure time of execution is by using following convenience functiontimeit()This function returns object of Timer class. It mainly requires two parameters.stmt − a string containing valid Python statement whose execution time is to be measured.setup − a string containing Python statement which will be executed once, primarily to ... Read More

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