FPGA Based Open Calculator Platform

[MeindertKuipers]

My personal opinion, based on my FPGA and microcontroller experience, is that with an FPGA you still depend heavily on the operating system to develop and specific tools that are typically vendor bound and closed source.
Most microcontroller tools are supported on many OS'es and allow others to develop and contribute as well. In addition, when planning to use SD cards, BT or Wifi, you will have to use some level of CPU support. Microcontroller libraries are often open source.
I was planning myself to start with an FPGA project to interface with the HP41, but when discovering the features of the RP2040 microcontroller I decided that that would be a much more flexible and open path towards something real and working.