Thanks for your reply. In short: my setup is a pc with an analog ati card connected to a crt tv 15khz with a vga scart rgb cable. Using win7 and calamity crtemudriver that let me to use lowres. I tried to launch the game and I noticed it uses the desktop resolution (640x480 interlaced that is the max res a 15khz can support and is not good for playing). Which is the minimum resolution that the game support?
Would be great to play it in 320x200 pure old school resolution with no filters, no scaling :)