19. GENERAL PURPOSE REGISTERS INSTRUCTION POINTER AND FLAG REGISTER SEGMENT REGISTERS CODE SEGMENT DATA SEGMENT CS SS DS ES FS GS EIP EFLAGS IP FLAGS 0 16 31 15 ESP EBP EDI ESI EDX ECX EBX EAX SP BP DI SI DX CX BX AX 0 16 31 15 STACK SEGMENT
20. CF VM RF 0 NT IOPL OF IF TF SF ZF 0 AF 0 PF 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 DF 16 17 18 31 RESERVED FOR INTEL E F L A G FLAGS Flag Register of 80486 AC CF: Carry Flag AF: Auxiliary carry ZF: Zero Flag SF : Sign Flag TF : Trap Flag IE : Interrupt Enable DF : Direct Flag OF : Over Flow IOPL : I/O Privilege Level NT : Nested Task Flag RF : Resume Flag VM : Virtual Mode AC : Alignment Check
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22. P A R I T Y 1 G X 8 ___ BE 3 ___ BE 2 ___ BE 1 ___ BE 0 1 G X 8 1 G X 8 1 G X 8 P A R I T Y P A R I T Y P A R I T Y DP 3 D 31 - D 24 DP 2 DP 1 DP 0 D 23 - D 16 D 15 - D 8 D 7 - D 0
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25. P E M P E M T S N E W P A M W T C E P G 31 16 15 0 Control Register Zero ( CR 0 )For The 80486 Microprocessor
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28. P R W U S P W T P C D A D O O OS BITS PAGE TABLE OR PAGE FRAME Page Directory or Page Table Entry For The 80486 Microprocessor 31 0 1 2 3 4 5 6 7 8 9 10 11 12
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31. 0 31 31 31 0 0 Con Ent Set select Tag Valid LRU Bits Valid bits 3 7 11 11 10 2 4 3 Cache test register of the 80486 microprocessor TR 3
32. GENERAL PURPOSE REGISTERS INSTRUCTION POINTER AND FLAG REGISTER SEGMENT REGISTERS CODE SEGMENT DATA SEGMENT CS SS DS ES FS GS EIP EFLAGS IP FLAGS 0 16 31 15 ESP EBP EDI ESI EDX ECX EBX EAX SP BP DI SI DX CX BX AX 0 16 31 15 STACK SEGMENT