→ Implied addressing refers to instructions that comprise only an opcode without an operand; for example, the INCA (“increment accumulator”) instruction.
→ An implied sequence commences when the PC reaches the opcode for an implied instruction
(a). loads that opcode into the IR
(b). Increments the PC (c). Recognizing that this is an implied instruction, the CPU executes it and continues on to the next instruction.
→ Instructions that use implied addressing are: CLRIM, DECA, DECX, HALT, INCA, INCX, NOP, POPA, POPSR, PUSHA, PUSHSR, ROLC, RORC, RTI, RTS, SETIM, SHL, and SHR.