I am using an original Atari 800. On my Windows 10 machine, I have a USB to 9 pin adapter. My SIO to PC device is the old one (NOT USB).
The SIO to PC worked on my Windows XP machine years ago. The USB to 9 pin adapter I have now works with other devices. But they don't seem to work together.
I run the configuration wizard and it says it was successful. However, it then shows "[Device Manager] RS232 Driver Failed to Initialize! (USB ONLY Mode Enabled)"
Booting the Atari from a mounted disk does nothing. I only get the memo pad.
The version of APE I am using is 3.0.2. The SIO to PC devices just shows a red light.
Any ideas what it could be?