fn format(mode: &AddressMode, prefix: &str) -> String {
    // let suffix = match mode {
    //     AddressMode::Implied => "",
    //     AddressMode::Accumulator => " A",
    //     AddressMode::Immediate(value) => &*format!(" #${value:02x}"),
    //     AddressMode::ZeroPage(value) => &*format!(" ${value:02x}"),
    //     AddressMode::ZeroPageX(value) => &*format!(" ${value:02x},X"),
    //     AddressMode::Absolute(offset) => &*format!(" ${offset:04x}"),
    //     AddressMode::AbsoluteX(offset) => &*format!(" ${offset:04x},X"),
    //     AddressMode::AbsoluteY(offset) => &*format!(" ${offset:04x},Y"),
    //     AddressMode::IndirectX(value) => &*format!(" (${value:02x},X)"),
    //     AddressMode::IndirectY(value) => &*format!(" (${value:02x}),Y"),
    //     AddressMode::ZeroPageY(value) => &*format!(" ${value:02x},Y")
    // };
    // format!("{}{}", prefix, suffix)
    prefix.to_string()
}