Run Cygwin's Xwin in 100 dpi mode

Modify \usr\X11R6\bin\startxwin.bat.

Use this line to start up Xwin in 100 dpi mode:

run XWin -multiwindow -clipboard -silent-dup-error -dpi 100

Add this line to prepend the font path:

xset +fp /usr/X11R6/lib/X11/fonts/100dpi/

Run your xterm and specify the font parameters.

run xterm -fa "Lucida" -fs 10 -e /usr/bin/bash -l