Flags / Control Registers

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  • Overflow Flag (OF)
  • Direction Flag (DF) - Direction to read string
  • Interrupt Flag (IF)
  • Trap Flag (TF) - Used by debugger
  • Sign Flag (SF) - Shows the sign of the arithmetic operation
  • Zero Flag (ZF) - Set to 1 if result of arithmetic operation is 1
  • Auxilary Carry Flag (AF)
  • Parity Flag (PF) - It contains the total number of 1 bits in arithmetic operation
  • Carry Flag (CF) - Set to true if carry occurs in arithmetic operation