Question

Explain the following instruction of 8085 Micro-processor:

LDAX D

Answer 1

LDAX rp: [LOAD ACCUMULATOR INDIRECT]

Format: [A] ← [[rp]]

Addressing: Register indirect

Group: Data transfer group

Bytes: 1 byte

Flag: None

Comment: The data stored in the memory location whose address is held in the register pair rp is transferred to the accumulator. The contents of the memory location remain unchanged. The register pair rp may be B (i.e. B and C) or D (i.e. D and E).

Example: Let [B] = 25 H, [C] = 25 H and [2525] = 33 H

Instruction: LDAX B

After execution: [A] = 33 H