8085 / 8085A for Stack

Stack I/O, and Machine Control Instructions:

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

PUSH Push Two bytes of Data onto the Stack

POP Pop Two Bytes of Data off the Stack

XTHL Exchange Top of Stack with H & L

SPHL Move content of H & L to Stack Pointer

The I/0 instructions are as follows:

IN Initiate Input Operation

OUT Initiate Output Operation

The Machine Control instructions are as follows:

EI Enable Interrupt System

DI Disable Interrupt System

HLT Halt

NOP No Operation