Function cpu_read_in

core/cpu.c:158–163

}

static uint8_t cpu_read_in(uint16_t pio) {
    if (unprivileged_code()) {
        return 0; /* in returns 0 in unprivileged code */
    }
    return port_read_byte(pio);
}

static void cpu_write_out(uint16_t pio, uint8_t value) {
    if (unprivileged_code()) {