JRiddle solution

gistfile1.cs

using System;
using System.Text;

namespace JRiddle
{
	class MainClass
	{
		static void JRiddle()
		{
			var message = new byte[] {

				181,  18,                           //                           XXX, XXX,
				181,  45,                           //                           XXX, XXX,
				181,  59,                           //                           XXX, XXX,
				181,  60,                           //                           XXX, XXX,
				181,  45,                           //                           XXX, XXX,
				182,  35,                           //                           XXX, XXX,
				180, 232,                           //                           XXX, XXX,
				181,  11,                           //                           XXX, XXX,
				180, 235,                           //                           XXX, XXX,
				181,  23,                           //                           XXX, XXX,
				181,  20,                           //                           XXX, XXX,
				181,  13,                           //                           XXX, XXX,
				181,  26,                           //                           XXX, XXX,
				181,  22,                           //                           XXX, XXX,
				181,  17,                 // let the 8086's word                 XXX, XXX,
				181,  13,                 // cross his boundary                  XXX, XXX,
				180, 232,                 // at Little Bighorn                   XXX, XXX,
				181,  44,                 //    +1876*6*25                       XXX, XXX,
				181,  55,                           //                           XXX, XXX,
				181,  42,   181,  58,               //               XXX, XXX,   XXX, XXX,
				181,  65,   180, 233,               //               XXX, XXX,   XXX, XXX,
				180, 232,   181,  48,               //               XXX, XXX,   XXX, XXX,
				181,  60,   181,  60,               //               XXX, XXX,   XXX, XXX,
				181,  56,   181,   2,               //               XXX, XXX,   XXX, XXX,
				180, 247,   180, 247,               //               XXX, XXX,   XXX, XXX,
				181,  50,   181,  43,               //               XXX, XXX,   XXX, XXX,
				181,  55,   181,  53,               //               XXX, XXX,   XXX, XXX,
				181,  53,   181,  45,               //               XXX, XXX,   XXX, XXX,
				181,  58,   181,  43,               //               XXX, XXX,   XXX, XXX,
				181,  45,   180, 246,               //               XXX, XXX,   XXX, XXX,
				181,  56,   181,  52,               //               XXX, XXX,   XXX, XXX,
				180, 247,   181,  44,               //               XXX, XXX,   XXX, XXX,
				181,  55,   181,  42,               //               XXX, XXX,   XXX, XXX,
				181,  58,   181,  65,               //               XXX, XXX,   XXX, XXX,
				181,  44,   181,  45,               //               XXX, XXX,   XXX, XXX,
				181,  62,   180, 247,               //               XXX, XXX,   XXX, XXX,
				181,   7,   181,  46,               //               XXX, XXX,   XXX, XXX,
				181,  41,   181,  59,               //               XXX, XXX,   XXX, XXX,
				181,  44,   181,  45,               //               XXX, XXX,   XXX, XXX,
				180, 252,   180, 253                //               XXX, XXX,   XXX, XXX

				//          (68k)                                                (x86)
			};
			
			Array.Reverse (message);

			int weirdSum = 1876 * 6 * 25;

			short[] shortMessage = new short[message.Length / sizeof(short)];
			Buffer.BlockCopy(message, 0, shortMessage, 0, shortMessage.Length);

			for (int i = 0; i < shortMessage.Length; ++i) {
				shortMessage[i] = (short)(shortMessage[i] + weirdSum);
			}

			byte[] newMessage = new byte[shortMessage.Length];
			Buffer.BlockCopy(shortMessage, 0, newMessage, 0, newMessage.Length);

			Console.WriteLine(Reverse(Encoding.Unicode.GetString(newMessage)));
		}

		public static string Reverse( string s )
		{
			char[] charArray = s.ToCharArray();
			Array.Reverse( charArray );
			return new string( charArray );
		}

		public static void Main (string[] args)
		{
			JRiddle ();
		}
	}
}