Register indirect addressing allows data to be addressed at any memory location through an offset address held in any of the following registers: BP, BX, DI, and SI. For example, if register BX con- tains 1000H and the MOV AX,[BX] instruction executes, the word contents of data segment offset address 1000H are copied into register AX. If the microprocessor is operated in the real mode and DS = 0100H, this instruction addresses a word stored at memory bytes 2000H and 2001H, and transfers it into register AX (查看原文)
The [ ] symbols denote indirect addressing in assembly language. In addition to using the BP, BX, DI, and SI registers to indirectly address mem- ory, the 80386 and above allow register indirect addressing with any extended register except ESP. (查看原文)
