Mesa 7I92TM Parallel port pin mapping

Ah, so the .pin file is the descriptor for the .bin file. That's helpful

I have 3 of these things and this is the first one I've ever flashed. Presumably the factory image has some standard pinout that miraculously matched the pin in's of the other two devices. That's what I want to get back to.

I put the thing on the scope and it's just not right. If I scope the original computer with native parallel i get a nice clean step signal, but if I scope this card I only get intermittent step pulses. But the width of the high pulse is the same as the native parallel.

So I want to get back to the native firmware just to see if the intermittent problem goes away. I think it will because when I first go this card it did work on a different machine.

Thanks for the explanation on the .pin and .bit files - that helped a lot.  Do I need to worry about Table1 and Table2 mapping?  Or is that all taken care of in PNCConf?
 

I suspect the default firmware is a 5ABOB type parallel port firmware
but I can check later.

Hunting on the step/dir outputs is more likely a setup issue than firmware
(since all firmware stepgens are identical)

I did a diff on the two readhmid outputs from the re-flashed one vs. another one that I hadn't touched and they were the same for the pins in question. So either the flash didn't take or something else is broken. (there were other differences in the two files)

In any event for now I'm going to go back to making a DB-25 converter since I've exceeded my rabbit hole depth limit

Thank you for sticking with me.

After flashing, you need to power cycle  the 7I92 or use mesaflash's  --reload option

You should not need to use any kind of cable adapter

If you have a unique breakout, firmware can be built for this in a few minutes