[PDF] 8085 instruction set pdf

  • What is 8085 instruction set?

    The 8085 instruction set is classified into 3 categories by considering the length of the instructions. In 8085, the length is measured in terms of “byte” rather than “word” because 8085 microprocessor has 8-bit data bus. Three types of instruction are: 1-byte instruction, 2-byte instruction, and 3-byte instruction.

  • How many instructions does 8085 have?

    Since the 8085 is an 8-bit device it can have up to 28 (256) instructions. However, the 8085 only uses 246 combinations that represent a total of 74 instructions. Each instruction has two parts. The first part is the task or operation to be performed.

  • What is 8-bit instruction in 8085?

    In 8085 Instruction set, XRI is a mnemonic that stands for “eXclusive OR Immediate with Accumulator” and “d8” stands for any 8-bit data. This instruction is used to Ex-OR 8-bit immediate data with the Accumulator. The result of Ex-ORing will be stored in the Accumulator overwriting its previous content.
  • In 8085 Instruction set, RC is a mnemonic, which stands for “Return if Carry”. This instruction is used to return to the main program, only if Cy flag value is 1. If Cy flag value is 0, program flow continues in the subroutine sequentially. It is a 1-Byte instruction.
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