Modules/clock/Settings
From MSX Game Library
Library configuration (msxgl_config.h):
#define RTC_USE_CLOCK TRUE // Add functions to handle date and time #define RTC_USE_CLOCK_EXTRA TRUE // Add extra date and time functions that require additional data #define RTC_USE_SAVEDATA TRUE // Add functions to read/write into the CMOS #define RTC_USE_SAVESIGNED TRUE // Add signature handling to validate CMOS I/O