This will replace the old event decoding format with new input.

‘Format line?’ asks the user for the event decoding format. The format of each line is;
b-mask, load-loc, load-len, comments
b-mask-- These are the bits that have to be set in the event bitmask for this format line to become active.
load-loc -- This tells the program where (which parameter number) to start loading the data into. SMAUG will automatically load the event bit mask as parameter 1. and LAM-- mask as parameter 2 if the values 1 and 2 for the load-loc are not used.
load-len -- This tells the program how many words of data to load.
comments -- This can be any character string preceded by a "!" mark used typically to describe the format lines. If the comments are not included, then the third comma can be left off.

The event decode format is typically stored in a file so that the user only has to define it once, and thereafter only has to remember the file name that he stored the format under.