This tutorial refers to the Year 2000 compliance of your machine. Please refer to tutorials 2-4 to examine the compliance of your programs. The problem is that most RTCs have no means of recording the century. If the BIOS cannot do this or the machine's operating system cannot upgrade the BIOS and RTC then the clocks will show wrong dates when the RTC rolls over to the year 2000. A DOS BOOT DISK Testing your RTC, BIOS and Operating system clocks for millennium compliance.
Press escape to exit the program.
Switch off the machine. Re Boot the machine using the Dos boot disk. In older machines the OS clock will roll over but the RTC and BIOS clocks will revert to 1900, with the century byte staying at 19. Escape to the DOS prompt. We can define true compliance as the ability of the BIOS to automatically update the century byte as the clocks rollover from the 20 th to the 21 st century.