Super Mario 64 RNG Function

#include <iostream>
unsigned short RNG64(unsigned short input){
    unsigned short S0 = (input & 0xFF) << 8;
    S0 ^= input;

    input = (S0 << 8) + (S0 >> 8);
    S0 = input ^ ((S0 & 0xFF) << 1);

    unsigned short S1 = (0xFF80 ^ (S0 >> 1));

    return S0 & 1 ? S1 ^ 0x8180 : S1 ^ 0x1FF4;
}
unsigned short RNGWrapper(){
    static unsigned short StoredInput=0;
    StoredInput = RNG64(StoredInput);
    return StoredInput;

}
int main(){
    for (int i = 0; i < 50; i++){
        std::cout << RNGWrapper() << std::endl;
    }
    system("PAUSE>NUL");
}