I have several IO cards.
A hypercom 3 and a hypercom4 and a Vario.
All worked well.
Now with OS4 I am using the VArio to print(parallel port).
It is about twice as fast as the hypercoms were.
Maybe OS4??
And it also has a clockport on it..nice card.
But any io card will perfom better then the standard parallel port me think.
I would go for smallest io card more cooling.
