def instr_Jmp(instruction, pointers, fo, assembly_failed):
    if len(instruction) < 4:
        if len(instruction) < 3:
            CustomError.ERR_missingArgument(instruction[-1], '1')
            return False
        CustomError.ERR_missingArgument(instruction[-1], '2')
        return False
    topmid_byte_bottom_nibble = jump_flags.get(instruction[1], None)
    if topmid_byte_bottom_nibble == None:
        CustomError.ERR_invalidArgument(instruction[-1], '1')
        return False
    if instruction[2][0] != '&':
        CustomError.ERR_invalidArgumentType(instruction[-1], '2',
                                            "label reference")
        return False
    temp = pointers.get(instruction[2], None)
    if temp == None:
        CustomError.ERR_labelMissing(instruction[-1])
        return False
    low_bytes = int(temp) * 2
    if low_bytes > 65535:
        CustomError.ERR_outOfBounds(instruction[-1])
        return False
    if not assembly_failed:
        fo.write("{}{} {}".format("0d0", topmid_byte_bottom_nibble,
                                  "%.4x" % (low_bytes)))
    return True
def instr_Call(instruction, pointers, fo, assembly_failed):
    if len(instruction) < 3:
        CustomError.ERR_missingArgument(instruction[-1], '1')
        return False
    if instruction[1][0] != '&':
        CustomError.ERR_invalidArgumentType(instruction[-1], '1',
                                            "label reference")
        return False
    temp = pointers.get(instruction[1], None)
    if temp == None:
        CustomError.ERR_labelMissing(instruction[-1])
        return False
    low_bytes = int(temp) * 2
    if low_bytes > 65535:
        CustomError.ERR_outOfBounds(instruction[-1])
        return False
    if not assembly_failed:
        fo.write("{} {}".format("0efe", "%.4x" % (low_bytes)))
    return True