x86暫存器

EAX (Accumulator Register) (32 bit)
EBX (Base Register) (32 bit)
ECX (Count Register) (32 bit)
EDX (Data Register) (32 bit)
ESP (Stack Pointer) (32 bit)
EBP (Base Pointer) (32 bit)
ESI (Source Index) (32bit)
EDI (Destination Index) (32bit)
FS
GS
SS (Stack Segment) (16 bit)
DS (Data Segment) (16 bit)
ES (Extra Segment) (16 bit)
CS (Code Segment) (16 bit)
EIP (Instruction Pointer) (32 bit)

RAX (EAX 64 Bit Version) (64 bit)
RBX (EBX 64 Bit Version) (64 bit)
RCX (ECX 64 Bit Version) (64 bit)
RDX (EDX 64 Bit Version) (64 bit)
RSP (ESP 64 Bit Version) (64 bit)
RBP (EBP 64 Bit Version) (64 bit)
RSI (ESI 64 Bit Version) (64 bit)
RDI (EDI 64 Bit Version) (64 bit)
RIP (EIP 64 Bit Version) (64 bit)


Flag
Over flow Flag  (OF)    OV(1)   NV(0)
Direction Flag  (DF)    DN(1)   UP(0)
Interrupt Flag  (IF)    EI(1)   DI(0)
Sign Flag       (SF)    NG(1)   PL(0)
Zero Flag       (ZF)    ZR(1)   NZ(0)
Auxiliary Flag  (AF)    AC(1)   NA(0)
Parity Flag     (PF)    PE(1)   PO(0)
Carry Flag      (CF)    CY(1)   NC(0)

整理如下圖：


參考資料：
BIOS研發技術剖析
微算機原理與接口技術
64位元微處理器應用編程