defasm drop
    # 58 ?'                        ; pop eax
next

defasm dup
    # ff ?' # 34 ?' # 24 ?'        ; push dword [esp]
next

defasm over
   # ff ?' # 74 ?' # 24 ?' # 4 ?'  ; push dword [esp + 4]
next

defasm swap
    # 58 ?'                        ; pop eax
    # 5b ?'                        ; pop ebx
    # 50 ?'                        ; push eax
    # 53 ?'                        ; push ebx
next