On: Windows on Raspberry

[vardump]

You can achieve MHz GPIO speed with RPi running Raspbian. There are FIFOs and DMA.

The days of bitbanging are long since gone.

[TheRealPomax → vardump]

Of course you can, but this article is about folks who want to use Windows (for whatever reason). If you want to use "the raspi" as a controller, there is zero reason to look for a way to put Windows on a tiny board. A standard raspi already does what you need.