Been trying to search for what the post_ttl connector on the CR4 XL and Jr Programmer v2 is for. So far I found an image of one connected to a CR3 and someone mentioning something called rater feature. I also read a warning that you should not try to program the CR4. Is the post_ttl port how they were programmed when they were built?
For the Jr programmer v2, it is used for serial post monitoring. Using the rater feature on some coolrunners(CR4 and CR3), you can optimize the boot times on the console. The port is where the jr programmer plugs into the coolrunner.
