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Conditional Flags
Conditional flags represent result of last arithmetic or logical instruction executed. Conditional flags are as follows:
1. CF (Carry Flag)
This flag indicates an overflow condition for unsigned integer arithmetic. It is also used in multiple-precision arithmetic.
2. AF (Auxiliary Flag)
If an operation performed in ALU generates a carry/barrow from lower nibble (i.e. D0 - D3) to upper nibble (i.e. D4 - D7), the AF flag is set i.e. carry given by D3 bit to D4 is AF flag. This is not a general-purpose flag; it is used internally by the processor to perform Binary to BCD conversion.
3. PF (Parity Flag)
This flag is used to indicate the parity of result. If lower order 8-bits of the result contains even number of 1's, the Parity Flag is set and for odd number of 1's, the Parity Flag is reset.
4. ZF (Zero Flag)
It is set; if the result of arithmetic or logical operation is zero else it is reset.
5. SF (Sign Flag)
6. SF (Sign Flag)
In sign magnitude format the sign of number is indicated by MSB bit. If the result of operation is negative, sign flag is set.
7. OF (Overflow Flag)
This stands for over flow flag. It occurs when signed numbers are added or subtracted. An OF indicates that the result has exceeded the capacity of machine. It becomes set if the sign result cannot express within the number of bites.
Read More: http://www.daenotes.com/electronics/digital-electronics/8086-8088-microprocessor
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Are all flags the same size?
Yes, apart from the Denmark and Nepal flag.
What is the operational difference between the IRET and RET instructions?
Usually return from interrupt restores the flags so that the interrupted code can continue to execute properly. Return from subroutine does not need to do that instruction is used intentionally in that flow of code and known that the flags are or are not destroyed depending on the architecture.
What is difference between branching and looping?
looping run condition contiously till a specific condition is true ,otherwise branching test condition at a time.
What do symbols mean on flags?
You can also gain some insight from the DESCRIPTION of a flag, which occasionally includes some information on symbolism, in the CIA World Factbook.
Which statement is used to execute some code only if a specified condition is true?
if ($condition == true) { codeToRun(); }
How many pins are available in 8086?
The 8086 family of microprocessors, including the 8086, 80C86, and 80C86AL, are presented in 40-pin DIP packages.
What is the difference between microprocessors 85 and 86?
85 is a 8 bit processor,number of flags are 5 and memory capacity is 64KB while 86 is a 16 bit processor ,number of flags are 9 and memory capacity is 1 MB.The main difference between 8085 and 8086 is that 8086 uses pipelining.
Where can one find Harley Davidson flags?
Harley-Davidson flags are available online from many retailers. One can find a variety of flags available on ebay while they can also be purchased from Amazon and Biker Flags.
What micro controllers for a digital control system?
for dcs 8086 and 8085 are usually used as base microcontroller as these have indication flags which r signaled to registers
When does the overflow flag in 8086 set?
In the 8086/8088, the overflow flag is set when the result of an arithmetic instruction exceeds the bounds of the signed representation of a number. This is not the same as the carry flag, which is used for the unsigned representation. Both flags get set as needed. You decide which one to pay attention to.
What information is available at the Six Flags website?
There is a lot of information available from the Six Flags website. It has locations of the parks, hours of operations along with what can and cannot be taken inside the park.
What is the basic difference between instruction RET and IRET in 8086 microprocessor?
RET pops the PC off of the stack, while IRET pops both the flags and the PC off of the stack.
Where is a good place to find American flags for sale?
American flags are available from many online sites. Included in these are The Flag Shop, USA Flags and American Flags 4 Less. Flags of many sizes and made from many different materials can be found.
Where can one purchase rebel flags?
Rebel flags, also commonly referred to as Confederate flags, are available at a few online retail stores. These stores include Amazon and Rebel Store.
Where can a person find information on all the different religious flags?
You can find information on different religious flags by researching online or visiting religious websites and forums. Additionally, you may find comprehensive information in books or resources that focus on the study of religion and religious symbols.
Which IC is used as clock generator in 8086?
The 8086 Microprocessor operate to require frequency that is provided by clock generator to 8086 Microprocessor and also Synchronization various component of 8086.
What are applications of 8086 microprocessor?
8086 main application is to evaluate the arithmetic operations in any systems that uses 8086
