Duck Hunt (VS) NES-patch
========================
Version: 3.10


What's this?
============
Finally, it's "Duck Hunt(VS)" patched to be playable on a real NES instead of the
VS Unisystem. I haven't tried the patch on the hardware (I don't have a Zapper or CRT-tv),
but if you encounter any problems, feel free to contact me.

Features
========
* Patched to use mapper 1 instead of odd mapper 99.
* VS-Zapper emulation
* VS-Zapper theft-detection-alarm cracked.
* Coin-insert emulation by pressing "Start" on gamepad in port 1.
* Highscore saving (for each gamemode)

Usage
=====
Apply patch to "Duck Hunt(VS).nes". Press "start" on gamepad connected to port 1.
Make sure you have your Zapper connected to port 2.

When starting the patched ROM you'll see a introscreen that allows you to select
a gamemode. Game A is easist and Game C hardest. Pick desired mode with SELECT
and press START to play.

If you want to reset all highscores, hold B + A while starting the game.

Please notice
=============
If you have intentions of selling Duck Hunt(VS)-cartridges using my patch, please contact
me first.

Tech details
=============
This patch has been developed using the following tools:
* Notepad / NotePad++ / Visual Studio Code
* Dasm
* FCEUX / Mesen
* Own-written utility for applying patches
* Famicom AV NTSC / NES PAL

Notice that this version is not compatible with savefiles from older versions (2.0)
of this hack.

The three gamemodes are based on the following dipswitch settings from the arcade.
Game A = Bonuslife at 30.000 points, 5 misses/game, easy difficulty
Game B = Bonuslife at 50.000 points, 5 misses/game, normal difficulty
Game C = Bonuslife at 50.000 points, 3 misses/game, hard difficulty

Contact author
==============
This is the most complex patch I've ever done so far and it took many many hours
to finish it. If you feel like it, don't hesitate to contact me with your comments,
ideas or perhaps even some kind words. :)


Reach me at: morjoh@live.se


History
=======
v3.10	2022-02-16	* Fixed MMC1 initialization

v3.00	2020-03-22	* Almost completely rewritten
			* Dip switch settings are changed to three different
			  gamemodes
			* Individual highscore settings for each gamemode
			* Introscreen with scrolltext :)

v2.2	2015-03-27	* Minor optimizations

v2.1	2014-06-16	* Internal codecleanup
			* Minor optimizations
			* Highscores are now reset if DIP-switches changed from
			  last time you played.

v1.61	2013-05-04	* If SRAM is not present/write-protected for some reason
			  a red screen will flash for a few seconds while booting
			  the game.

v1.6	2013-04-24	* Fixed duck/pigeon flying-path bug that sometimes
			  occured.

v1.5	2013-03-29	* Added a dipswitch-settings screen.
			* Happy Easter edition! :)

v1.4	2013-03-24	* Code cleanup and minor optimizations

v1.3	2013-03-20	* Controls remapped! 

v1.2	2013-03-19	* Now works with EverdriveN8 flashcart! (Thanks Robert
			  for reporting this)

v1.1	2013-03-19	* Added highscore-saving 

v1.0b	2013-03-18	* First release!