The logo register is also known as the program status register PSW (Program Status Word).
The contents of each model logo register are as follows:
The OFOVLOW FLAG Overflow Sign Operator Over the range of machine representation indicates that overflows, the symbol of the 1.sfsign flag symbol logo records the result of the SFSIGN Flag symbol flag, and the result is equal to 0, otherwise it is 0. CFCARRY FLAG carry flag The maximum effective bit is generated. Otherwise, when the 0.AFAuxiliary carry flag assists, the third bit is generated to the 4th bit, otherwise 0.pfparity flag parity operation The number of operational digits is 1 when the number of operators is 1, otherwise the 0.dfDirecion flag direction flag is used for string processing. DF = 1, after each operation, Si and DI are reduced. During time, it is increased. Great .Ifinterrupt Flag interrupt flag if = 1, allow the CPU response to be shielded, otherwise the interrupt is closed .Tftrap Flag trap flag is used to debug single-step operation. Iopli / o privilege leveli / o privilege level in protection mode for control Access to the I / O address space. NTNESTED TASK Nested task flag? RFRESUME FLAG restarts the flag? VMVIRTUAL_8086 MODE VMVIRTUAL_8086 MODE Virtual 8086 mode bit VM = 1, can simulate the 8086 processor programming environment. Acalignment Check Mode alignment check Bit? Vifvirtual Interrupt FLAG Virtual Interrupt Sign? VIPVIRTUAL INTERRUPT PENDING FLAG Virtual Interrupt Universal Sign? IDIDENTIFICATION FLAG Identification Sign?
The symbol of the sign bit in Debug indicates:
FLAGNAMEFLAG == TRUE (1) FLAG == FALSE (0) OF Overflow (yes / no) OVOVerflowNVNot oVerflowDF direction (decrement / increment) DNDowNUPUPIF Interrupt (allowed / off) EIEnable InterruptDIDisable InterruptSF sign (negative / positive) NGNeGativePLPLusZF zero ( Yes / No) ZrzeronZNot? Zeroaf Assisted Alignment (Yes / No) Acauxiliary CarryNanot AuxiliaryPF Pack (Yes / No) Peparity EvenPoparity ODDCF Carry (Yes / No) CycarryNCNOT Carry
