I have the same DB9 adapter and had the same problem!high5 wrote:tried the >2 controllers support today with some dual DB9 to USB adapters which connect two db9 joysticks to a single usb port.
First one is some years old (from http://www.retro-donald.de (offline)), second one ist "RetroFun! Twin Connect 2x Retro joysticks to PC" from http://electronica4u.com/
Both are working fine under Windows (Winuae shows two input devices per adapter). At least the last one should work under Linux: Our adapter installs without additional drivers, on every system starting from Windows XP to Windows 10, Linux and other supporting HID devices.
Both of them give same results on minimig and SNES core. Both connected joysticks controll the same player. On the Linux side lsusb just shows one single device per adapter.
Any ideas if this dual adapters may work with MiSTer or would I need a dedicated adapter per joystick?
Yesterday I found out Donald's adapter was sold with older firmware. I have two of them, bought at the end of 2015 and mid 2016.
While the sticker on the Eeprom says it has the latest firmware from 3/2015, both really had the old one and therefore both work only with one controller under Linux.
I had them flashed with the last firmware and now they both work as intended with the MiSTer and two controllers per adapter.
The other adapter might have this problem: