The Flag register is
a Special Purpose Register which shows the status of the task
. This is an 8-bit register but the only 5bit is used for the operation. The flag becomes set or reset after arithmetic and logical operation.
How many flags are there in microprocessor?
Flag register of 8086 microprocessor. The flag register is one of the special purpose register. The flag bits are changed to 0 or 1 depending upon the value of result after arithmetic or logical operations. 8086 has 16-bit flag register, and there are
9 valid flag bits
.
What are the types of flags in microprocessor?
- Sign Flag (S)
- Zero Flag (Z)
- Auxiliary Cary Flag (AC)
- Parity Flag (P)
- Carry Flag (CY) …
- Overflow Flag (O) – This flag will be set (1) if the result of a signed operation is too large to fit in the number of bits available to represent it, otherwise reset (0).
What are the different types of flags?
Flags of various forms and purpose are known as
colours, standards, banners, ensigns, pendants (or pennants), pennons, guidons, and burgees
.
What are the various flag used in 8085?
8085 has five flags.
Sign flag, zero flag, Auxiliary carry flag, Parity flag and Carry flag
.
What is difference between carry and auxiliary carry flag?
The auxiliary carry flag
AF watches for a 4-bit (nibble) carry
, while the common carry flag CF watches for a carry-out from the MSB of the operand size.
What are the two types of flags?
- National Flags – Individuals and businesses alike fly these to show pride in their country, or to signify their country of origin.
- Provincial Flags-Each province has it’s own special flag these flags are usually flown at government offices.
What are the 8086 interrupt types?
The 8086 has two hardware interrupt pins, i.e.
NMI and INTR
. NMI is a non-maskable interrupt and INTR is a maskable interrupt having lower priority. One more interrupt pin associated is INTA called interrupt acknowledge.
Which instruction does not affect any flag?
As there is no arithmetic or logical operation being performed, no flags are affected by
data transfer instructions
. Arithmetic instruction: Arithmetic Instructions are the instructions that perform basic arithmetic operations such as addition, subtraction, and a few more.
What is auxiliary carry flag?
Auxiliary Carry Flag (AF) is
one of the six status flags in the 8086 microprocessor
. This flag is used in BCD (Binary-coded Decimal) operations. … This flag is set to one if there is a CARRY from the lower nibble or BORROW for the lower nibble in binary representation. Else it is set to zero.
What are 3 types of flags?
- National flags are one of the symbols of a country. …
- International flags are flags that symbolize union of any type between nations.
- Maritime flags are the flags used at sea. …
- Sport flags are used in sports as a method of signalization. …
- Political flags can represent political parties.
How many types of flags are there?
Flags have many uses. Well , if it’s based upon a microprocessor question , there are about 9 flag bits that form the flag register. Carry flag , Auxiliary Carry flag, Zero flag, parity flag, Overfow flag, Sign flag etc. There are
two types of flags in programming language
.
Why are flags so important?
A flag represents an idea, or an ideal. It is neither a mere piece of decoration, nor an object to be honoured for itself. It is honoured for what it represents. Many flags are
held in high esteem for their history
; for the sacrifices made by the people; for the qualities for which the country and people stand.
What is the purpose of Zero flag?
Along with a carry flag, a sign flag and an overflow flag, the zero flag is
used to check the result of an arithmetic operation, including bitwise logical instructions
. It is set to 1, or true, if an arithmetic result is zero, and reset otherwise.
What is the function of DF flag?
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.
What is the difference between 8085 and 8086?
| Property 8085 Microprocessor 8086 Microprocessor | Data Bus Size 8-Bit 16-Bit | Address Bus Size 16-bit 20-bit | Clock Speed 3MHz Varies in range 5.8 – 10 MHz |
|---|
