typedef void (*ptr_func_t)();

struct smd_header {
    char console_name[16];
    char copyright[16];
    char domestic_name[48];
    char international_name[48];
    char version[14];
    unsigned short checksum;
    char io_support[16];
    unsigned long rom_start;
    unsigned long rom_end;
    unsigned long ram_start;
    unsigned long ram_end;
    unsigned long sram_enabled;
    unsigned long unused1;
    unsigned long sram_start;
    unsigned long sram_end;
    unsigned long unused2;
    unsigned long unused3;
    char notes[40];
    char country_codes[16];
};

extern int main(void);
static __attribute__((interrupt)) void __start(void);
static __attribute__((interrupt)) void HSYNC_handler(void);
static __attribute__((interrupt)) void VSYNC_handler(void);
static __attribute__((interrupt)) void CPUException_handler(void);

extern unsigned __stacktop;

__attribute__((section(".stack"), used)) unsigned *__stack_init = &__stacktop;

__attribute__((section(".vectors"), used)) ptr_func_t __isr_vectors[] = {
    __start,
    CPUException_handler,
    CPUException_handler,
    CPUException_handler,
    CPUException_handler,
    CPUException_handler,
    CPUException_handler,
    CPUException_handler,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    HSYNC_handler,
    __start,
    VSYNC_handler,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
    __start,
};

__attribute__((section(".smd_header"), used)) struct smd_header __smd_header = {
    .console_name = "SEGA MEGA DRIVE ",
    .copyright = "BIGEVILCORP.    ",
    .domestic_name = "HELLO WORLD                                     ",
    .international_name = "HELLO WORLD                                     ",
    .version = "GM XXXXXXXX-XX",
    .checksum = 0x0000,
    .io_support = "J               ",
    .rom_start = 0,
    .rom_end = 0xfffff,
    .ram_start = 0xff0000,
    .ram_end = 0xffffff,
    .sram_enabled = 0x00000000,
    .unused1 = 0x00000000,
    .sram_start = 0x00000000,
    .sram_end = 0x00000000,
    .unused2 = 0x00000000,
    .unused3 = 0x00000000,
    .notes = "                                        ",
    .country_codes = "  E             ",
};

static void __start(void)
{
    main();
}
static void HSYNC_handler(void) {}
static void VSYNC_handler(void) {}
static void CPUException_handler(void)
{
     asm inline volatile ("  stop #2700");
}