WORLD OF GAME BEGINS........19th century

 What do you think of a game, as you think just as entertainment, yeah" that's right . The way of development of game have raised a lot from 19th century. There are lot of changes in the games we use to play today, we use our phones to play games. but, on the time of begin of games . There is a term name as "emulator". It is a gaming tool were early gamer use to play, it is like a video game.....The founder of emulator is LARRY MOSS...He was the origin of the emulator .

HISTORY OF EMULATOR 

In computing, an emulator is hardware or software that enables one computer system (called the host) to behave like another computer system (called the guest). An emulator typically enables the host system to run software or use peripheral devices designed for the guest system. Emulation refers to the ability of a computer program in an electronic device to emulate (or imitate) another program or device. Many printers, for example, are designed to emulate HP LaserJet printers because so much software is written for HP printers. If a non-HP printer emulates an HP printer, any software written for a real HP printer will also run in the non-HP printer emulation and produce equivalent printing. Since at least the 1990s, many video game enthusiasts have used emulators to play classic (and/or forgotten) arcade games from the 1980s using the games' original 1980s machine code and data, which is interpreted by a current-era system. 

A hardware emulator is an emulator which takes the form of a hardware device. Examples include the DOS-compatible card installed in some 1990s-era Macintosh computers, such as the Centris 610 or Performa 630, that allowed them to run personal computer (PC) software programs and FPGA-based hardware emulators. In a theoretical sense, the Church-Turing thesis implies that (under the assumption that enough memory is available) any operating environment can be emulated within any other environment. However, in practice, it can be quite difficult, particularly when the exact behavior of the system to be emulated is not documented and has to be deduced through reverse engineering. It also says nothing about timing constraints; if the emulator does not perform as quickly as the original hardware, the emulated software may run much more slowly than it would have on the original hardware, possibly triggering timer interrupts that alter behavior.

DEVELOPMENT OF EMULATORS DAY BY DAY..........

1] NES EMULATORS

NES EMULATOR

Family Computer Emulator V0.35 for FM Towns, by "Haruhisa Udagawa", with file timestamps of December 12, 1990. It could run some simple NES games such as Donkey Kong.

• Pasofami for the FM Towns, with a release date of May 1, 1993, in its info file. It had very preliminary sound emulation. Windows version was released in 1995.
• LandyNES by Alex Krasivsky, which it seems became the base of iNES emulator. At least one beta version for DOS, called Prerelease "Stupid" version, was released to the public on September 8, 1996 with the filename "DC-NES.ZIP". This version supported some simple Mapper 1 games and had graphical glitches. Unfortunately no copy of this emulator remains on the internet; it was mainly hosted on now-defunct FTP sites and none of the websites that supposedly hosted it were archived by Wayback Machine. This project was discontinued after the release of NESticle.
• Marat Fayzullin's NES (also known as interNES in early versions) is the first (or at least one of the first) emulators to use NES HEADER FORMATE. The release date of the first version is 1996 according to its site.
• NESA (Nintendo Entertainment System in Assembler) by British programmer Paul Robson was one of the first free NES emulators with source code available. 
• NES STICLE (first version known as v0.2) was released on April 3, 1997. It was one of the first freeware NES emulators.
• There was an unreleased NES emulator for the Genesis that was programmed by Yuji Naka during the early 1990s as a hobby.

2] Game Boy/Color

GAME BOY EMULATOR

Not much is known about GB/C emulation before 1995.

• Marat Fayzullin's VISUALS GAME BOY (VGB) was first known GB/C emulator that could run commercial games. First released in 1995 for some unknown platform then ported to PC sometime in 1995 or 1996.
• NO$DOS was released for DOS in 1997. Game Boy Color support was added in 1998 along with it being paid only.

3] Game Boy Advance{GBA}

GBA EMULATOR

Unlike other consoles, GBA emulation and the Homebrew scene was started as early as 2000, a year before GBA's release.

• GBA EMULARTORS, released in September 2000, was the first known GBA emulator. It could run some homebrew ROMs as well as Nintendo's "Yoshi's Story" tech demo.
• VITRUAL GAME BOY ADVANCED[VGBA], done by the same author of iNES and VGB - Marat Fayzullin, was first released in 2000 according to its official site. In versions released in 2001, it could run a few commercial games.
• IGBA, which was available as early as February 2001 and last updated on March 25, 2001, could run a few commercial games with some graphical glitches and with no sound.
• Several GBA emulators with more accuracy were released in 2001, for example BOYCOTT ADVANCE,DREAM GBA, GBA, and VBA
• mGBA, original going to be a written in JavaScript, development began in 2013 with its first release in early 2015. It aimed for accuracy on low-end machines and has since been one of the best GBA emulators around.

4] Nintendo DS

DS EMULATOR

• DS EMULATORS, first released in 2004, was the first "attempt" to emulate the Nintendo DS, although it only emulated GBA hardware.

• iDEAS, first released in 2004 or 2005, was the first Nintendo DS emulator that could run commercial games. It also had some plugin system that was not widely used.

• ENSATA: An official Nintendo DS emulator made by Nintendo (and Intelligent Systems?) that was leaked to emulation community in an unknown year (perhaps 2005 or 2006). It could run select few commercial games, though compatibility was very low.

5] Nintendo 3DS

3DS EMULATOR

• CITRA was the first released 3DS emulator. Its first commit was on Aug 29, 2013. It was able to boot its first game, Ocarina of Time 3D, on Dec 13, 2014.
• 3DMOO was started shortly after Citra, on Mar 19, 2014.
• TRONS'DS first version was released May 11, 2014.

6] Nintendo Switch

NINTENDO SWITCH EMULATOR

• CageTheUnicorn, now MEPSHITO, was the first program to attempt to emulate only a part (not the whole) of the Nintendo Switch, it started development May 16, 2017. The developers have stated their goals are for it to be used as a debugger and that there are no plans for getting commercial games running.
• YUZU, a fork of CITRA started research and early development sometime in Spring 2017, with its first commit on September 24, 2017. It was publicly released January 13, 2018.
• RYUJINX was the first Nintendo Switch emulator to boot a commercial game, Puyo Puyo Tetris, when it released on February 4, 2018.

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