I tested Dosbox 0.74-3 with Pinephone keyboard.

Easy install:
sudo apt-get install dosbox

Fullscreen doesn't work, it is missaligned too badly. Maybe somebody, skill full enough, should make real Maemo Leste version.
BUT scaled window works!, have to edit config file using command:
nano ./.dosbox/dosbox-0.74-3.conf

change lines to:
windowsresolution=1440x668
output=opengl