MESA 7I76 / 7i76e Model

There are three numbers for each pin.

The IO number, which IO pin of the FPGA it is. (what the software calls it)
The Pin number (which pin it is on the DB25 connector)
The 7i76 number, which terminal it is on the 7i76.

For all practical purposes you only need to worry about the 7i76 numbers. But you can use Mesaflash to check that the DB25 numbers correspond to the DB25 numbers that the 7i76 expects. (basically a firmware compatibility check)

The 7i76 GPIO pins are serially accessed, they _all_ connect to pins 7 and 8 on the DB25 (IO 10 & 11 for P3, 27 & 28 for P2)

Just a follow-up... I got it figured out, and for anyone having issues with not seeing the TB-4, TB-5, TB-6 issues...
you NEED an external power supply (24vcd typical).

RE: forum.linuxcnc.org/38-general-linuxcnc-q...76d-pncconfig-issues

Thanks for the assistance! I think I have enough to go with for now.
Jerry

Apologies for reviving this old topic but found a mistake on the diagram that may generate a lot of frustation to anyone trying to use it.

Pin AI3 is missing, so all other digital input pins from so on are displaced 1 position.

Unfortunatelly even if moderators delete the link in both  #98901  and  #112565  on the forum, the diagram is still appearing as one of the first searchs on search engines. Not sure if OP has a way to change the picture on his cloudfront account.