If the problem to solve is piping an emacs buffer to a Windows 95 text mode binary and replacing the buffer with the text output, the solution could be 1. Run

If the problem to solve is piping an emacs buffer to a Windows 95 text mode binary and replacing the buffer with the text output, the solution could be 1. Run Windows 95 in an emulator, maybe a webassembly one. 2. Generate the mouse clicks and keyboard events to run that program, probably in a full screen DOS window. It must be in the %PATH% 3. In the same way type in the buffer in the input of the program. 4. OCR the output. 5. Replace the content of the buffer. I think it is feasible. Step 1 is for example https://github.com/felixrieseberg/windows95 https://github.com/felixrieseberg/windows95 I wouldn't be surprised that steps 2 to 4 are already implemented in some form. Step 5 should be trivial.