Quoted from Parker_tz:
Does anyone happen to have the rom file for twilight zone version P-1. I want to make my sample game more like the original prototype game. I can not seem to find the file if anyone has the files or the rom set for sale I am interested. If you are currently running P-1 in your game is their any way you can copy your rom into a file?
Thank you Parker
I believe you posted this in the TZ thread as well. Go ahead and do whatever you want, but be aware that the P-1 ROM does not include any differences in game rules, and includes some minor bugs AND is not a "Prototype" ROM (the P in the name does not stand for Prototype).
The closest you can get to the original game as intended is still by installing the third magnet and using the 9.4H ROM