I am trying to install QNX 6.5 on an acromag board.
So far everything works ok but the serial ports.
if i configure the ports on the bios as auto i only get working com 1 on 3f8 irq 4.
if i configure com 2 as 2f8, iRQ3 (default) it never gets recognized.
if i configure com 2 as 3e8, 3 sometimes it is recognized by qnx, sometimes not. 
if i configure serial port 1 on any adreess that is not 3f8,4 sometimes i get the 2 ports working, sometimes i get only 
com 1, sometimes i get only com2.

The problem is not devc-ser8250. it is the enumerator that sometiimes don't see the ports.

On windows 7 both ports work OK.

On windows both ports appear as LPC serial port