Stack I/O, and Machine Control Instructions:

The following instructions influence the Stack and/or Stack Pointer:

1.      PUSH    Push two bytes of Data onto the Stack

2.      POP     Pop Two Bytes of Data off the Stack

3.      XTHL    Exchange Top of Stack along with H and L

4.      SPHL    Move content of H and L to Stack Pointer

The I/0 instructions are given as:

1.      IN         Initiate Input Operation

2.      OUT     Initiate Output Operation

The Machine Control instructions are as:

1.      EI         Enable Interrupt System

2.      DI         Disable Interrupt System

3.      HLT      Halt

4.      NOP     No Operation