1f7edfdb3b
While Emscripten has an SDL compabtility layer, it assumes that the code is executing in the main browser process (and thus has access to them DOM). The Infinite Mac project runs emulators in a worker thread (for better performance) and has a custom API for the display, sound, input, etc. Similarly, it does not need the cross-platform sound support from cubeb, there there is a sound API as well. This commit makes SDL (*_sdl.cpp) and cubeb-based (*_cubeb.cpp) code be skipped when targeting Emscripten, and instead *_js.cpp files are used instead (this is the cross-platform convention used by Chromium[^1], and could be extended for other targets). For hostevents.cpp and soundserver.cpp the entire file was replaced, whereas for videoctrl.cpp there was enough shared logic that it was kept, and the platform-specific bits were moved behind a Display class that can have per-platform implementations. For cases where we need additional private fields in the platform-specific classes, we use a PIMPL pattern. The *_js.cpp files with implementations are not included in this commit, since they are closely tied to the Infinite Mac project, and will live in its fork of DingusPPC. [^1]: https://www.chromium.org/developers/design-documents/conventions-and-patterns-for-multi-platform-development/
DingusPPC
Written by divingkatae and maximumspatium
Be warned the program is highly unfinished and could use a lot of testing. Any feedback is welcome.
Philosophy of Use
While many other PowerPC emus exist (PearPC, Sheepshaver), none of them currently attempt emulation of PPC Macs accurately (except for QEMU).
This program aims to not only improve upon what Sheepshaver, PearPC, and other PowerPC mac emulators have done, but also to provide a better debugging environment. This currently is designed to work best with PowerPC Old World ROMs, including those of the PowerMac G3 Beige.
Implemented Features
This emulator has a debugging environment, complete with a disassembler. We also have implemented enough to allow Open Firmware to boot, going so far as to allow audio playback of the boot-up jingles.
How to Use
This program currently uses the command prompt to work.
There are a few command line arguments one must enter when starting the program.
-r, --realtime
Run the emulator in runtime.
-d, --debugger
Enter the interactive debugger.
-b, --bootrom TEXT:FILE
Specifies the Boot ROM path (optional; looks for bootrom.bin by default)
-m, --machine TEXT
Specify machine ID (optional; will attempt to determine machine ID from the boot rom otherwise)
As of now, only the Power Macintosh G3 Beige is implemented.
How to Compile
You need to install development tools first.
At least, a C++20 compliant compiler and CMake are required.
You will also have to recursive clone or run
git submodule update --init --recursive
This is because the CubeB module is not included by default. All other components are already included in the thirdparty folder and compiled along with the rest of DingusPPC.
For example, to build the project in a Unix-like environment, you will need to run the following commands in the OS terminal:
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make dingusppc
You may specify another build type using the variable CMAKE_BUILD_TYPE.
Future versions may drop SDL 2 as a requirement.
For Raspbian, you may also need the following command:
sudo apt install doxygen graphviz
Testing
DingusPPC includes a test suite for verifying the correctness of its PowerPC CPU emulation. To build the tests, use the following terminal commands:
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make testppc
Intended Minimum Requirements
- Windows 7 or newer (64-bit), Linux 4.4 or newer, Mac OS X 10.9 or newer (64-bit)
- Intel Core 2 Duo or better
- 2 GB of RAM
- 2 GB of Hard Disk Space
- Graphics Card with a minimum resolution of 800*600
Compiler Requirements
- GCC 4.7 or newer (i.e. CodeBlocks 13.12 or newer)
- Visual Studio 2013 or newer