Random Player 1 A button presses on Famicom AV and NES (Humble Bazooka Fami BT)

[EvilAsh25]

I have a Humble Bazooka Fami BT adapter that I've been testing and I'm seeing random A presses on player 1 in quite a few games. I saw that some people previously reported having this issue on Player 2, but I am seeing it on Player 1 as well.

I've found the easiest games to see this on are RPGs where a single A press will open the menu: Dragon Warriors 1+2, Destiny of an Emperor, Final Fantasy. If I leave the game up (usually takes around 1-3 minutes) eventually there will be an A press and it will open the menu. I've tried other games and have seen it happen in others as well, but it is difficult to test for and see the result due to the intermittent timing. A couple other games I've seen the issue so far: Duck Tales, Battle of Olympus

Here is what I've tried so far:

• It still happens when no controller is connected to the adapter.
• It happens on different Famicom AVs (I own 2, one RGB modded, one not).
• It happens on both the expansion port and the front controller ports of my Famicom AVs (I am using a Humble Bazooka FAM2NES adapter for the front controller ports).
• I also see the random A presses on my toaster NES (using the FAM2NES adapter).

I sent a message to Stone Age Gamer asking if I had a faulty device and they responded that there were games with issues. They asked which games I saw the issue with so they could add it to a list, but it seems like it is happening on a lot of games for me. At least more than I can reasonably test. I figured I would ask here before responding back.

If anyone has any suggestions I'm happy to try any additional testing.

What I am testing with:

• Device: Humble Bazooka Fami BT
• Consoles: Famicom AV and toaster NES
• FW: v25.01
• Controllers: Switch NES/SNES, 8Bitdo SN30 pro+, 8Bitdo M30
• Adapter Accessory: Humble Bazooka FAM2NES

[darthcloud]

Yes It's a known issue see #897 I think it's just that P1 is less likely.

I debugged a bit we couldnt figure how to fix it.

Basicly some glitch happen on the clk line which BR see as a clock pulse which make the bitstream offset by one.

Real controller are immune to this glitch, my own BlueRetroDevKit is immune too somehow.

We tried to make the FC adapter front end more like the BR devkit but that didn't help.

[EvilAsh25]

That's unfortunate, thanks for the reply though. I did end up contacting StonAgeGamer and got a replacement device, but the new one also has the issue.

I have a friend who has the RetroTime NES Hub and he isn't seeing the issue on his NES testing the same games. Maybe there is a hardware difference there that affects it?