openMSX

openMSX is a <a href="/facts/Free_software/IaoVtJXn">free software</a> <a href="/facts/Emulator/FMHE8qDj">emulator</a> for the <a href="/facts/MSX/mthwra8a">MSX architecture</a>. It is available for multiple platforms, including <a href="/facts/Microsoft_Windows/bwhAhuSL">Microsoft Windows</a> and <a href="/facts/POSIX/mQkSt234">POSIX</a> systems such as Linux. 
For copyright reasons, the emulator cannot be distributed with original MSX-BIOS <a href="/facts/ROM_image/D7ngQLxV">ROM images</a>. Instead, openMSX includes C-BIOS, a minimal implementation of the MSX BIOS, allowing some games to be played without the original <a href="/facts/ROM_image/D7ngQLxV">ROM image</a>. 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:

<ul><li>MSX TurboR</li>
<li><a href="/facts/Moonsound/3ybyLpc8">Moonsound</a></li>
<li><a href="/facts/AT_Attachment/QPchqXH8">IDE</a> Controller by Sunrise</li>
<li>GFX9000</li>
<li>Pioneer Palcom LaserDisc</li></ul>
Also some computer systems similar to MSX are emulated, like the SpectraVideo SVI-318/328, ColecoVision and Sega SG-1000.
Notable features include:

<ul><li>Scalers</li>
<li>Debugging including visual debugging of graphics</li>
<li><a href="/facts/Tcl/s7fbKYtR">Tcl</a> Script Support</li>
<li>Cheat Finder</li>
<li>Game Trainers</li>
<li>Audio/Video recording</li>
<li>Reverse support (go back in emulated time to correct mistakes or debug what happened)</li></ul>
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:

<ul><li>openMSX Catapult (by the openMSX team; obsoleted by the new graphical user interface introduced with openMSX 20.0)</li>
<li>openMSX Debugger (by the openMSX team; obsoleted by the built-in debugger introduced with openMSX 20.0))</li>
<li>openMSXControl plugin</li>
<li>NekoLauncher openMSX</li>
<li>openMSX Peashooter</li>
<li>openMSX Control Plugin for Gedit</li></ul>
There is a dead subproject to redevelop Catapult, a GUI developed for the emulator that is part of the project, utilizing <a href="/facts/Python_(programming_language)/YbuGqofa">Python</a> and the <a href="/facts/Qt_(toolkit)/gVhwlQnJ">Qt</a> toolkit.
The separate openMSX Debugger, written in <a href="/facts/C%252B%252B/Et0F2qn9">C++</a> and utilizing the <a href="/facts/Qt_(toolkit)/gVhwlQnJ">Qt Toolkit</a> 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.

openMSX open-in-new

openMSX