The ports show up as LPT2 and LPT3 in MAX, so I believe VISA is installed correctly. They just don't respond to the Parallel Port Read and Write vi. I've used Device Manager to see that they have hex addresses CCC8-CCCF and CCD8-CCDF (the motherboard parallel port is at 0378). I put those addresses into the vi and it doesn't operate.
I'm going to try to tie some pins together to simulate having a printer connected to the port so that it will think to operate in the SPP configuration.
I'll tie pin 1 to pin 10.
Pins 11,12, and 17 will be grounded.
I'll tie pins 13 and 15, but let them float. I've read this will help.
The other config I've read is to tie 12, 15, and 17 high, while tying pins 11 and 12 low.
I'll see if any of this works.