Editing OpenMSX (section)

{{Infobox software
| name = openMSX
| logo = OpenMSX-logo-256.png
| caption = 
| developer = openMSX [[Virtual team|Team]]
| latest release version = 20.0
| latest release date = {{release date and age|2024|09|22}}<ref>{{cite web|url=https://openmsx.org/|title=Home|accessdate=22 September 2024}}</ref>
| latest preview version = 
| latest preview date = 
| programming language = [[C++]] (core), [[Tcl]], (openmsx-catapult: [[wxWidgets]])<ref>{{cite web | url=https://packages.debian.org/jessie/openmsx-catapult | title=Debian -- Details of package openmsx-catapult in jessie | accessdate=2017-03-10}}</ref>
| operating system = [[POSIX]] and [[Microsoft Windows|Windows]]
| platform = 
| genre = [[Emulator]]
| license = [[GNU General Public License|GNU GPLv2]]+
| website = {{URL|//openmsx.org}}
}}
{{lowercase|openMSX}}
[[File:OpenMSX cbios021.png|thumb|right|openMSX running CBIOS]]

'''openMSX''' is a [[free software]] [[emulator]] for the [[MSX|MSX architecture]]. It is available for multiple platforms, including [[Microsoft Windows]] and [[POSIX]] systems such as Linux. 

For copyright reasons, the emulator cannot be distributed with original MSX-BIOS [[ROM image|ROM images]]. Instead, openMSX includes C-BIOS, a minimal implementation of the MSX BIOS, allowing some games to be played without the original [[ROM image]]. It is possible for the user to replace C-BIOS by native BIOS if they prefer.

OpenMSX emulates a large amount of MSX systems and MSX related hardware, including:

*MSX TurboR
*[[Moonsound]]
*[[AT Attachment|IDE]] Controller by Sunrise
*GFX9000
*Pioneer Palcom LaserDisc

Also some computer systems similar to MSX are emulated, like the SpectraVideo SVI-318/328, ColecoVision and Sega SG-1000.

Notable features include:
*Scalers
*Debugging including visual debugging of graphics
*[[Tcl]] Script Support
*Cheat Finder
*Game Trainers
*Audio/Video recording
*Reverse support (go back in emulated time to correct mistakes or debug what happened)

OpenMSX has an open communication protocol to communicate with the openMSX emulator. Utilizing this communication protocol enables to write versatile add-ons for openMSX. Projects making use of this protocol include the following applications:
*openMSX Catapult (by the openMSX team; obsoleted by the new graphical user interface introduced with openMSX 20.0)
*openMSX Debugger (by the openMSX team; obsoleted by the built-in debugger introduced with openMSX 20.0))
*openMSXControl plugin
*NekoLauncher openMSX
*openMSX Peashooter
*openMSX Control Plugin for Gedit

There is a dead subproject to redevelop Catapult, a GUI developed for the emulator that is part of the project, utilizing [[Python (programming language)|Python]] and the [[Qt (toolkit)|Qt]] toolkit.

The separate openMSX Debugger, written in [[C++]] and utilizing the [[Qt (toolkit)|Qt Toolkit]] is not in development anymore, as efforts are now focused on the built-in debugger.

So, as of release 20.0, a GUI was integrated that replaces almost all functionality of the Catapult and separate Debugger programs. Both these sub-projects will not be developed further, in favour of the built-in functionality. The new GUI is using the [[Dear ImGUI]] toolkit.