Digital counter speeds

Hi everyone,

I am currently using a NI 9401 with a NI cDAQ 9172. I am using the onboard counter to do the following (pseudo-code):

- on every digital edge on counter-input pin 1 : p=p+1

- if (p = 100) { toggle output pin 2; p=0 }

It is working great for frequencies in the 10 MHz range.

I now want to do the same counting procedure at a rate of 100 MHz.

If I understand the datasheets correctly then this should not be possible with my current hardware. Is this correct?

I had the idea to buy and use an NI myRIO board to do this. What would you expect to be the highest input frequency the above code would work with? In your opinion: would that be the "way to go"?

Cheers!