07-16-2011, 02:50 PM
Because your e7400 is a dual-core CPU. Every process that isn't optimized for the multi-threading can use only 1 core (in your case JPCSP uses 50% of your CPU because it uses the 100% of one of the two cores installed on your system). You can find this thing also in other non-professional softwares. It isn't a problem of the emulator, but just a feature that it missing.