PCI obsolescence - IEEE1284 (EPP,ECP,LPT) printer port ASIC
I suggest you bit banging LPT port in code. AVR example can be found here. Alternatively you can make debugging via some new preffered interface, and then just for old debug devices make an intermediate hardware that will translate this new interface to old LPT interface. This will be good for the future, because you can drop LPT completely when RTOS finally gets a replacement.