Events capacity varies with Civ2 version. It's measured by memory space. Total events memory in ToT is 104 kB, about a third that number in MGE and a quarter in FW. The size of an individual event can also vary. In ToT, a single event requires 284 bytes + strings (1 byte per character, including 1 null terminator per string). Not all words in events.txt are saved as strings; event names and parameters are keywords, and many others are converted to bitmasks. To determine your available memory in ToT, add the line @DEBUG immediately below @BEGINEVENTS in events.txt and then load the scenario. This will produce a file called report.txt in your scenario folder. Navigate to the end of the file and you will find your remaining heap space. Remove or comment out (semi-colon) the @DEBUG line before you release your mod/scenario, otherwise the game will continue dumping to the file (which also slows load times). Some of this info can be found in macro.txt, so yeah, read that.
