Little John PalmOS is an open source multi-system emulator

Emulator

In computing, an emulator is hardware or software or both that duplicates the functions of a first computer system in a different second computer system, so that the behavior of the second system closely resembles the behavior of the first system...

 for Palm OS

Palm OS

Palm OS is a mobile operating system initially developed by Palm, Inc., for personal digital assistants in 1996. Palm OS is designed for ease of use with a touchscreen-based graphical user interface. It is provided with a suite of basic applications for personal information management...

 5.0 (or newer) devices. The program emulates ten game consoles or handheld devices for Palm OS, and will open standard ROMs stored on the device or memory card. Note that, unlike most emulators for a mobile device which emulate the mobile device itself on a Windows, Mac OS, or Linux platform, LJP runs on a Palm OS device to emulate game systems. It is free software

Free software

Free software, software libre or libre software is software that can be used, studied, and modified without restriction, and which can be copied and redistributed in modified or unmodified form either without restriction, or with restrictions that only ensure that further recipients can also do...

 licensed under the GPL

GNU General Public License

The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

.

Features

• Sound (except Wonderswan)
• Multiple screen modes (zoom/smoothing)
• Adjustable/auto frameskipping
• SRAM support
• Multiple Save/Load state
• Turbo mode
• Support for zipped roms
• Supports Bluetooth Gamepad, IR Keyboard, and Wii Remote input
• Tapwave Zodiac
  Tapwave Zodiac
  The Zodiac is a mobile entertainment console, launched on 5 May 2003, and released in October 2003 by Tapwave, a former private company that was based in Mountain View, California....
  
   accelerated/smoothed
• Customizable input

Development

Little John Palm is written largely by Yohann Magnien, but several other individuals also greatly contributed, especially Bruno "Tinnus" Bottino, Henk "metaview" Jonas, and Jeff "Skeezix" Mitchell.

During the writing of Little John Palm, code was taken from the many other open source emulators for other platforms, including Jeff Mitchell's own GuineaPig emulator, another popular multi-emulator for the Palm OS. In that respect, LJP can be considered more of a porting of existing code onto the Palm platform, as opposed to have been written from scratch. However, this is something of a generalization, for while the emulator is largely influenced by existing emulators, much effort had to be made to port it to the Palm platform. As of 2009, the current version is 1.2.

History

Little John Palm was originally a NES emulator for the GP32 called Little John, written by yoyofr. It was then ported to the Tapwave Zodiac, and renamed LJZ (Little John Zodiac). Later it was again ported to the general Palm OS, and renamed LJP. Tinnus started working at 0.92, making a version 0.92T. After Tinnus and yoyofr releasing 1.0 RC2, and Tinnus releasing 1.0 RC3, Henk "MetaView" Jonas took over and released versions 1.0 RC4-9 and 1.0-1.1.

Future

Tinnus had stopped working on LJP, instead working on LJR/LJX (Little John Revival), which is a project aimed at performing the same general functions with a better framework. metaview has taken over updating LJP, and had released 1.0 RC4-9 and 1.0-1.1.

Compatible systems

• Nintendo Entertainment System
  Nintendo Entertainment System
  The Nintendo Entertainment System is an 8-bit video game console that was released by Nintendo in North America during 1985, in Europe during 1986 and Australia in 1987...
  
   (NES)
• Super Nintendo Entertainment System
  Super Nintendo Entertainment System
  The Super Nintendo Entertainment System is a 16-bit video game console that was released by Nintendo in North America, Europe, Australasia , and South America between 1990 and 1993. In Japan and Southeast Asia, the system is called the , or SFC for short...
  
   (SNES)
• Game Boy
  Game Boy
  The , is an 8-bit handheld video game device developed and manufactured by Nintendo. It was released in Japan on , in North America in , and in Europe on...
  
  /Game Boy Color
  Game Boy Color
  The is Nintendo's successor to the 8-bit Game Boy handheld game console, and was released on October 21, 1998 in Japan, November 19, 1998 in North America, November 23, 1998 in Europe and November 27, 1998 in the United Kingdom. It features a color screen and is slightly thicker and taller than...
  
   (GB/GBC)
• Sega Mega Drive/Genesis
• Sega Master System
  Sega Master System
  The is a third-generation video game console that was manufactured and released by Sega in 1985 in Japan , 1986 in North America and 1987 in Europe....
  
   (SMS)
• Sega Game Gear
  Sega Game Gear
  The was Sega's first handheld game console. It was the third commercially available color handheld console, after the Atari Lynx and the TurboExpress....
  
   (GG)
• Wonderswan
  WonderSwan
  was a line of handheld game consoles produced in Japan by Bandai between 1999 and 2003. It was developed by the late Gunpei Yokoi's company Koto and Bandai...
  
  /Wonderswan Color (WS)
• NeoGeo Pocket/NeoGeo Pocket Color (NGP)
• Atari 2600
  Atari 2600
  The Atari 2600 is a video game console released in October 1977 by Atari, Inc. It is credited with popularizing the use of microprocessor-based hardware and cartridges containing game code, instead of having non-microprocessor dedicated hardware with all games built in...
  
   (VCS)
• TurboGrafx-16
  TurboGrafx-16
  TurboGrafx-16, fully titled as TurboGrafx-16 Entertainment SuperSystem and known in Japan as the , is a video game console developed by Hudson Soft and NEC, released in Japan on October 30, 1987, and in North America on August 29, 1989....
  
  (TG16) (Not fully implemented)