Update mappers.js

add mapper241

Author: ZhaoTonggang

src/mappers.js

@@ -1515,4 +1515,26 @@ Mappers[180].prototype.loadROM = function () {
   this.nes.cpu.requestIrq(this.nes.cpu.IRQ_RESET);
 };
 
+/**
+* Mapper 241 (BNROM, NINA-01)
+*
+* @description http://wiki.nesdev.com/w/index.php/INES_Mapper_241
+* @example 
+* @constructor https://blog.heheda.top
+*/
+Mappers[241] = function(nes) {
+			this.nes = nes;
+	};
+
+Mappers[241].prototype = new Mappers[0]();
+
+Mappers[241].prototype.write = function(address, value) {
+	 if (address < 0x8000) {
+			Mappers[0].prototype.write.apply(this, arguments);
+			return;
+		} else {
+			this.load32kRomBank(value, 0x8000);
+		}
+};
+
 module.exports = Mappers;