INSTRUCTION FORMAT AND ADDRESSING MODES OF 8085 MICROPROCESSOR - Dr M Pushpavalli

The Intel 8085 microprocessor, is a popular 8-bit microprocessor widely used in early computing devices. Its instruction format and addressing modes are crucial aspects defining how instructions are structured and how memory locations are accessed.
Instruction Format:The 8085 employs a variable-length instruction format, meaning instructions can have one, two, or three bytes.The first byte always specifies the opcode, which identifies the operation to be performed.
Additional bytes (if present) provide operand data or memory addresses.
Addressing Modes: The 8085 supports several addressing modes that determine how operands are accessed or referenced.Some common addressing modes include:Immediate Addressing,Direct Addressing,Register Addressing, Register Indirect Addressing and Implied Addressing.

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