I cancelled the pixel doubling which was left over by the RPi
[dosdemo] / src /
drwxr-xr-x   ..
-rw-r--r-- 788 demo.c
-rw-r--r-- 415 demo.h
drwxr-xr-x - dos
-rw-r--r-- 1354 screen.c
-rw-r--r-- 415 screen.h
drwxr-xr-x - sdl
-rw-r--r-- 5924 tunnel.c