Printer port dongle and dosemu trouble.

Hello.

You need a port range, not just one or two ports.
Check out your /proc/ioports for more. In my case parport0 resides in a range of 0x378-0x37a (according to /proc/ioports) and most likely you have the same range.

Also it may be necessary to unload the kernel's parport driver in order dosemu to access it as dosemu checks /proc/ioports itself to avoid conflicts.