The instruction set (opcode etc)

• Explain how intermediate language code is used after it has been generated?


  Software must be used to finish the translation process and The virtual machine will execute the intermediate language code and call functions to carry out the command
• Opcode: The part of an instruction that explains what the instruction does
• Operand: The part of an instruction that holds the value, memory address or register
• What are the two addressing modes mentioned in the study material?

  Immediate and direct
• In immediate addressing, how is the operand value treated?

  The operand value is treated as the actual value.
• If the operand in immediate addressing is 18, what value is used by the operation?

  18
• How does direct addressing differ from immediate addressing?

  Direct addressing uses the operand to signify a memory address.
• If the operand in direct addressing is 18, what value is used by the operation?

  The content of memory location 18.
• What are the key characteristics of immediate and direct addressing modes?

  • Immediate Addressing:
  • Operand is the actual value.
  • Example: Operand 18 means use 18.

  
  

  • Direct Addressing:
  • Operand signifies a memory address.
  • Example: Operand 18 means use the content of memory location 18.
• There are two addressing modes: immediate and direct.
• Immediate addressing - operand - actual value

  Direct addressing - operand - memory address