Program status word | 8086 Flag register | with examples
Program Status Word, also called Flag register, is a special register that enable our machines to implement complex logic. This video explains the 8086 Flag register with examples. 8086 Flag register is 16 bit wide and has SIX conditional and THREE control flags. This video looks into these flags in detail.
Other more powerful 32 bit and 64 bit machines of the x86 architecture are more powerful but retains compatibility with the earlier predecessor such as the 8085 and 8086. we will however consider the program status word of the 8086 for simplicity. These 1 bits of information tells us about multiple things or multiple properties of the currently executing instruction. Whenever an instruction is executed, it changes the state of the FLAG register that enables the compiler to implement complex conditional logic.