[PDF] 8085 opcode format

Opcode Format of 8085: The 8085A microprocessor has 8-bit opcodes. The opcode is unique for each Instruction and Data Format of 8085 and contains the information about operation, register to be used, memory to be used etc. The 8085A identifies all operations, registers and flags with a specific code.
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  • What is the format of the opcode?

    The opcode is the machinecode representation of the instruction mnemonic. The opcode field is 6 bits long (bit 26 to bit 31) but always set to 0 in the R format. The actual instruction to perform is placed in the funct field. The numeric representations of the source registers and the destination register.

  • What is opcode and operand in microprocessor 8085?

    Opcodes and operands
    The opcode is the instruction that is executed by the CPU and the operand is the data or memory location used to execute that instruction.

  • What is the instruction format opcode and operand?

    The layout of bits of instruction is called an instruction format. The instruction format contains opcode (the instructions to be executed), operand (the data on which the instructions are to be executed), and addressing mode.
  • In 8085 Instruction set, OUT is a mnemonic that stands for OUTput Accumulator contents to an output port whose8-bit address is indicated in the instruction as a8. It occupies 2 Bytes in the memory. First Byte specifies the opcode, and the next Byte provides the 8-bit port address.
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