This is the source to the Windows version of RPCemu.

There is a slight problem in that in order to compile with hardware scaling enabled, you need a WIP version of Allegro, which can be got from the Allegro SVN. However, there are no guarantees that a given WIP will even compile. Therefore, you will either have to fix it, wait for Allegro 4.2.1, or disable hardware scaling (the stretch_blit calls in vidc20.c).