SlackBuildsOrg/system/b2

b2 is a cross-platform BBC Micro emulator. Use your Windows/Linux PC or
macOS computer to play your old BBC games or develop new BBC software.

more info at https://github.com/tom-seddon/b2

Note: the maintainer is hosting the source in its github account
due to the many submodules b2 is using.
If in doubt please prepare the source package yourself with these
commands: for example, for TAG=b2-20240720-010024-9f95270

git clone --recursive --branch $TAG https://github.com/tom-seddon/b2.git
rm -rf b2/.git
mv b2 $TAG
tar cvfz $TAG.tar.gz $TAG
rm -rf $TAG