You would need to buy this:
https://www.ebay.com/itm/285294092600
Then you would need to cut a USB 2.0 Extender cable into 2 parts and connect the D+ and D- cables to the rs485 board.
I can share pictures next week, but for now you need to get these 2 parts.
I have never heard about that issue.
When you experience the lockup does the test buttons on the NAOMI itself work ?
When you say you are using a converter what do you mean ?
The problem with the NAND carts is that the NAND chips are long past their expected lifetime. Not too long I helped some people moving from Triforce NAND to DIMM. Of course that required several new Triforce units.
Not kick harness JAMMA harness.
If you do not have a JAMMA harness or a JAMMA setup you will need a supergun like this to play the games:
https://rgbslab.com/products/has-v5-0
If you just want to verify your setup just get your JVS IO powered with 5V and see if the ttx boots up.
CN9 is the big square footprint with 4 pins. There is no connector mounted in your pictures.
As you said, just get a JAMMA harness and power it with that since you will need to add some joysticks.
The original power to this JVS IO came through CN9. 5V and 12V. I suspect 5V is all you need.
You can pinout the 5Vand 12V from the appropriate JAMMA connector and onto the other headers.
This IO might also needs spoofing of the coin meter so that you will be allowed to insert coins. Insert a...
Older FPGAs always relied on uploading the bitstream to RAM in the FPGA device. Software would wait until the ready pin was asserted. My question is if the software checks if the ready pin is already asserted and if it is skips the upload ?
@RGB Thank you for the tip, I think I would prefer the HD15 directly since then It's only one cable with the nice VGA adapter + audio of course.
Tell me is the CSync TTL without the 470R on HAS 5.0 ?