How to tell if a Prime is version G1 or G2?

[toml_12953]

(04-13-2019 07:29 AM)grsbanks Wrote:  Softwarewise it runs at about 3x the speed of the G1:
http://techy.horwits.com/2018/12/hp-prim...hmark.html

When I try to run that benchmark, it asks for opts and no matter what number I put in there I get an Invalid Input error. I have both the app and the program on my virtual and physical calculators and both do that.