Question

Explain the following addressing mode of 8085 Microprocessor:

Direct Addressing

Answer 1

1. In direct addressing mode, the memory address is given immediately after the opcode in the program.
2. The operand’s address is explicitly mentioned within the instruction itself.
3. Instructions that use direct addressing mode are three bytes long: the first byte contains the opcode, the second byte holds the lower-order address, and the third byte contains the higher-order address.
4. Example: LDA 9FFFH - This instruction loads the accumulator with the contents of the memory location 9FFFH.