>>46474076I misinterpreted your question then
With modern games, they simply just pull the time and date from the system/console itself. But with simpler/dumber systems like the Gamebody/Color/Advance, cartridges would have internal clocks that piggybacked off of the same batter/power as the save file. Don't quote me on this, but I guess RAM was cheaper to produce and use than persistent memory, so any and all game cartridges with internal saves would have batteries, similar to the coin CMOS batteries they use on motherboards to save the BIOS settings. That's why some video games back in the cartridge era required save cartridges, because the developers didn't include batteries when they manufactured the cartridge--probably in an effort to save money.
