No need for DOSBOX or DOSBOX-X! These Terminal utilities use a bundled compilation of emu2 (https://github.com/dmsc/emu2). Just unzip the .run file into a bin directory (/boot/home/config/non-packaged/bin will do fine, just create it if it doesn't exist) and run it from the Terminal.
For Haiku X86_64 only.
Some of the ALT- and CTRL-hotkeys may not work as expected, because Terminal intercepts them before the DOS appication does. One of the following should get you to the app's menu...