I have written a few other emulators, and the very first question is always: is this feasible? The things to look for are:
- Software. Is the VT100 firmware available?
- Documentation. Is the hardware documented?
- Prior art. Are there other emulators to learn from?
One question remained, would a Rasperry Pi be powerful enough to simulate all the VT100 in real time? I wasn't sure, but projects like RetroPie suggest it should be.