Emu68
M68K emulation for ARM
Building instructions
In order to build Emu68 several tools are necessary. The first one is of course git, which will be used to clone the repository. Further, cmake will be used to configure the build. Firmware, if required, will be downloaded by cmake during project configure phase, here, either curl or wget will be used. Finally, aarch64 or aarch32 toolchain will be necessary.
Building on Ubuntu
Make sure your package repository is up to date
sudo apt-get update
Subsequently install the build-essential package as well as cross-compiler
sudo apt-get install build-essential gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
After the compiler is fetched we are almost done. Almost. The AArch64 architecture allows bi-endian …
Emu68
M68K emulation for ARM
Building instructions
In order to build Emu68 several tools are necessary. The first one is of course git, which will be used to clone the repository. Further, cmake will be used to configure the build. Firmware, if required, will be downloaded by cmake during project configure phase, here, either curl or wget will be used. Finally, aarch64 or aarch32 toolchain will be necessary.
Building on Ubuntu
Make sure your package repository is up to date
sudo apt-get update
Subsequently install the build-essential package as well as cross-compiler
sudo apt-get install build-essential gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
After the compiler is fetched we are almost done. Almost. The AArch64 architecture allows bi-endian operation, but the majority of the world is focusing on little-endian format as the native one. The cross-compiler provided by Ubuntu is not an exception and it defaults to little-endian systems. Furthermore, it lacks one big-endian relevant header which will need to be fixed now
sudo cp /usr/aarch64-linux-gnu/include/gnu/stubs-lp64.h /usr/aarch64-linux-gnu/include/gnu/stubs-lp64_be.h
One might wonder how it could work if a little-endian header is taken for the big-endian target. Well, in this case it is fully possible - this file is almost empty. At this point everything is configured properly and building of Emu68 can start. First, clone the repository
git clone https://github.com/michalsc/Emu68.git
After entering the Emu68 directory created by git, one need to pull the submodules
git submodule update --init --recursive
Now, create build directory and install directory, enter the build directory
mkdir build install
cd build
Finally, configure the cmake project
cmake .. -DCMAKE_INSTALL_PREFIX=../install -DTARGET=raspi64 -DVARIANT=pistorm \
-DCMAKE_TOOLCHAIN_FILE=../toolchains/aarch64-linux-gnu.cmake
In this example a 64-bit RaspberryPi build is selected with a PiStorm variant. Should you prefer a version of Emu68 which works in bare metal on Raspberry, but does not require PiStorm board, remove the -DVARIANT=pistorm from this line. If you prefer to not use the toolchain file, you need to specify your preferred compiler by yourself, e.g.
CC=aarch64-linux-gcc-10 CXX=aarch64-linux-g++-10 cmake .. -DCMAKE_INSTALL_PREFIX=../install \
-DTARGET=raspi64 -DVARIANT=pistorm
During configuration process cmake will fetch the most recent RaspberryPi firmware by itself. After the configuration is completed, start building process and finally install the compiled files to previously created install directory
make && make install
Now, build process is completed. Copy the contents of the install directory onto FAT32 or FAT16 formatted SD card. Your Emu68 build is completed.