I wanted to play Pirates! again, and had purchased it on GOG. Reading up on it, I wanted to play in Tandy mode for the much improved audio along with the EGA quality graphics. However, the DOSBox provided by GOG apparently has a bug with Tandy graphics that was fixed in later versions of DOSBox. The problem with just using a fixed DOSBox is that GOG has patched the MOUNT command to include the "-t overlay" option so that C: is first mounted as the game directory, and then the "cloud_saves" directory is mounted as C: with the "-t overlay" option, so that writes to C: go into the overlayed directory instead of the main directory.

So, I either lose Tandy audio or lose the ability to keep backup saves on the GOG cloud. Is there a version of DOSBox that includes the overlay option to the MOUNT command?