The Datapoint 3300 was strictly a terminal. It was not programmable and did not have an instruction set. It basically had counters for the cursor position and put characters into memory at that position, and had a ROM to generate characters. Manual: http://bitsavers.org/pdf/datapoint/3300/70116_3300termMaint_...
I don't think the Datapoint 2200 had any specific influences, at least none that I could find. Keep in mind that at the time, it was fairly common to make a processor out of TTL chips. People would make a custom processor for random things like a CNC controller or a video game. These processors were usually ad hoc, with an instruction set that had the features that were needed. If people were going to copy something, it was often a PDP-8 or 11 or a Data General NOVA.
I don't think the Datapoint 2200 had any specific influences, at least none that I could find. Keep in mind that at the time, it was fairly common to make a processor out of TTL chips. People would make a custom processor for random things like a CNC controller or a video game. These processors were usually ad hoc, with an instruction set that had the features that were needed. If people were going to copy something, it was often a PDP-8 or 11 or a Data General NOVA.