MICROPROCESSOR AND MICROCONTROLLER

8051 INSTRUCTION SET ADDRESSING MODES

ARCHITECTURE OF 8085

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
MOV A, @R0-Identify the Addressing mode
A
immediate
B
direct
C
Register indirect
D
implied
Explanation: 

Detailed explanation-1: -The R0 and R1 are used for 8-bit addresses, and DPTR is used for 16-bit addresses, no other registers can be used for addressing purposes. Let us see some examples of this mode. In the instructions, the symbol is used for register indirect addressing.

Detailed explanation-2: -The mode of addressing is known as register indirect mode. In this addressing mode, the offset address of data is in either BX or SI or DI Register. The default segment is either DS or ES. Example: MOV AX, [BX].

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