rem: return keyboard_getchar();
add: return arch_debug_blue_screen_getchar();
context: arch_debug_serial_getchar(void){#if BOCHS_DEBUG_HACK	if (sBochsOutput)		return keyboard_getchar();#endif	while ((in8(sSerialBasePort + SERIAL_LINE_STATUS) & 0x1) == 0)		;	return in8(sSerialBasePort + SERIAL_RECEIVE_BUFFER);}