Arduino for STM32

ok have been looking again at the confusing list of board variants. Have looked closely at STM32F756ZG which on the overview page lists : Up to 168 I/O ports with interrupt capability Up to 164 fast I/Os up to 108 MHz Up to 166 5 V-tolerant I/Os I have also looked at NUCLEO-H723ZG & NUCLEO-U575Z...

I have a project I want to make that needs around 96 directly controlled DIO pins. I had started the project with a Teensy4 but soon realised I could not use auto direction level shifters as these caused oscialltions in the signals. So I needed an extra 42 pins so I can control the IO direction indi...