Working Principle of Flags in 8086
- The results of arithmetic such as addition, subtraction, and bitwise, will be utilized to set new values to the markers. Each unique case would determine when the marker is switched on or off for a certain condition in order to update it.
- A Carry Flag (CF) indicates that an arithmetic operation resulted in zero, whereas a Zero Flag (ZF) indicates that two numbers were added and the result was overflow.
- Conditional branching allows instructions such as jump if zero or carry condition to alter the order of operations by testing flags. Consider a case in point where control could move from a program to one point in memory depending on whether or not a Zero Flag is set.
- Data Flow Control: Flags can also be used to manage the direction in which data moves, similar to string operations. This is where the Direction Flag (DF) is used to determine if data is being processed forwards or backwards.
- Interrupt Handling: Other flags like the Interrupt Flag (IF), help in enabling and disabling interrupt requests. The main intention is to allow events from the external world make the processor act, otherwise they may help to rank some duties in order of their importance.
Types of Flags in 8086
In this article, we will be going through the definition of different flags in 8086. We will talk about the topic’s flag register, types of flags, working principles, construction, and applications of flags in 8086 after looking at their various types. We will also discuss its advantages and disadvantages along with some FAQs.
Table of Content
- Flag Register in 8086
- Types
- Working Principle
- Construction
- Advantages
- Disadvantages
- Applications