Include a bool for switching emulation modes

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

main.cpp

@@ -57,7 +57,7 @@ public:
 	std::mt19937 gen; //Standard mersenne_twister_engine seeded with rd()
 	std::uniform_int_distribution<> distrib;
 	std::array<Key,16>keymap{X,K1,K2,K3,Q,W,E,A,S,D,Z,C,K4,R,F,V};
-	bool USE_ORIGINAL_CHIP8_SET=true;
+	bool USE_ORIGINAL_CHIP8_SET=true; //True means use the original CHIP-8 spec (COSMAC VIP emulation). Set to false to use CHIP-48 spec.
 
 	std::string Display8(int number){
 		std::bitset<8>numb(number);