X86 real mode register at a glance assembly learning

8086 CPU has a total of 14 registers, all of which are 16 bits

AX: accumulating register

CX: counter register

DX: data register

DS: segment register

ES: additional segment register

BX: base address register

SI: source index register

DI: destination indexing register

CS: code snippet register

IP: instruction pointer register

SS: stack segment register

SP: stack pointer register

BP: base pointer register

FLAG: flag register

The above are 14 registers running in X86 series CPU real mode.

AX registers can be divided into two independent 8-bit AH and AL registers

BX registers can be divided into two independent 8-bit BH and BL registers

CX registers can be divided into two independent 8-bit CH and CL registers

DX registers can be divided into two independent 8-bit DH and DL registers

Except for the above four data registers, none of the other registers can be divided into two separate 8-bit registers.