A draft of a assembly language-like machine emulator written in Python

emulator.py

#!/usr/bin/env/python3
# Authur: Yoxem
# License: Public Domain

code = [["MOV", 12 ,"GEN1"], ["MOV", "GEN1", ["GEN2", 6]], ["ADD", "GEN1", 12], ["ADD", "GEN1", "GEN2"]]

memory = [0] * 20;

registers = {
'GEN1' : 0,
'GEN2' : 0,
'GEN3' : 0,
'GEN4' : 0,
'GEN5' : 0,
'GEN6' : 0,
'GEN7' : 0,
'GEN8' : 0,
'STB' : 10, # STACK BOTTOM
'STT' : 5, # STACK TOP
'FRM' : 0

}

def emulator(code, register, memory):
    label = dict()
    i = 0
    while i < len(code):
        this_line = code[i]
        if this_line[0] == 'MOV':
            if isinstance(this_line[1], list):
                address = registers[this_line[1][0]] + this_line[1][1]
                registers[this_line[2]] = memory[address]
            elif isinstance(this_line[2], list):
                address = registers[this_line[2][0]] + this_line[2][1]
                memory[address] = registers[this_line[1]]
            else:
                if isinstance(this_line[1], int):
                    registers[this_line[2]] = this_line[1]
                else:
                    registers[this_line[2]] = registers[this_line[1]]

        elif this_line[0] == 'ADD':
            if isinstance(this_line[2], int):
                registers[this_line[1]] += this_line[2]
            else:
                registers[this_line[1]] += registers[this_line[2]]
        
        elif this_line[0] == "LABL" : # label
            label[this_line[1]] = i
        
        elif this_line[0] == "JUMP":
            i = label[this_line[1]]
        
        elif this_line[0] == "PUSH":
            memory[registers["STT"]] = registers[this_line[1]]
            register["STT"] -= 1
        elif this_line[0] == "POP":
            registers[this_line[1]] = memory[registers["STT"]]
            register["STT"] += 1



        if this_line[0] != "JUMP":
            i += 1

emulator(code, registers, memory)