1. (a) Critical memory storage shall be maintained by a methodology that enables errors to be identified and corrected in most circumstances.

2. (b) This methodology may involve:

   1. (1) Signatures;
   2. (2) Checksums;
   3. (3) Partial checksums;
   4. (4) Multiple copies;
   5. (5) Timestamps; and/or
   6. (6) Effective use of validity codes.
3. (c) Critical memory is used to store all data that is considered vital to the continued operation of the EGS.

4. (d) This includes, but is not limited to:

   1. (1) All electronic meters required in electronic metering within the EGS, including last bill data and power up and door open metering;
   2. (2) Current credits;
   3. (3) EGS/game configuration data;
   4. (4) Information pertaining to the last ten (10) plays with the RNG outcome (including the current game, if incomplete); and
   5. (5) Software state (the last normal state the EGS software was in before interruption).

Codification Notes: “RNG” means random number generator.