detect_256_mode.c

// Detect jumper position of System 256 if in 246+ or 256 mode
void test(void)
{
	uint64_t v4 = 0;
	int64_t v5 = 0;
	for (int i = 0; i < 10; i += 1)
	{
		int64_t TimerSystemTime = GetTimerSystemTime();
		DelayThread(16666);
		v4 += GetTimerSystemTime() - TimerSystemTime;
		sceGsSyncV(0);
		int64_t v7 = GetTimerSystemTime();
		sceGsSyncV(0);
		v5 += GetTimerSystemTime() - v7;
	}
	int64_t v8 = (int)(100 * v5 / v4);
	int64_t gClockType = 0;
	if ( v8 >= 97 && v8 <= 103 )
		gClockType = 100;
	else if ( v8 >= 130 && v8 <= 136 )
		gClockType = 133;
	if ( gClockType <= 100 )
	{
		// System is in 246+ mode
		// e.g. display "SYSTEM256 MODE SETTING ERROR"
	}
	else
	{
		// System is in 256 mode
	}
}