bool copy_bootrom(void) {
    const int size = 8*1024;
    int i;
    unsigned char buf[size];
    int fd, w;
    int old  = disable_irq_save();
    cpucache_invalidate();
    DEVID &= ~(1<<31);
    SCU_REMAP = 0;
    for (i = 0; i < size; i++) {
      buf[i] = (*(volatile unsigned char*)(i));
    }
    SCU_REMAP = 0xDEADBEEF;
    DEVID |= (1<<31);
    restore_irq(old);
    fd = creat("/bootrom.bin", 0666);
    if (fd < 0) {
      return false;
    }
    else {
      w = write(fd, buf, size);
      if (w < 0)
	return false;
      close(fd);
    }
      
    return true;
}