This is neither groundbreaking or especially relevant, but I found it interesting.
I figured the timetable feelie in Stationfall was probably not stored in memory, but created by a pseudo-random number generator. Poked around with TXD for a minute. Here it is:
The time is in global variable G144 (decimal)
X= G144 / 50
X= X-132
X= X^2
X= X/4
G92= X+132
Good to know, right?
P.S. Another fun fact from TXD. In Zork 2 you actually start at the entrance to the Royal Puzzle.