[Bug] Time sync problem

[basic2004]

PCem didn't works 'Synchronise time to host clock'.
I removed nvr and enter CMOS for test, this has set to 01-01-1980.
If time sync works correctly, this will set year 2017 automatically.

[Battler]

- basic2004: Some BIOS'es consider a year such as 2017 as invalid, and default to 1980-01-01 when they detect it. Make sure to test on other boards as well to exclude such a possibility.

[basic2004]

- basic2004: Some BIOS'es consider a year such as 2017 as invalid, and default to 1980-01-01 when they detect it. Make sure to test on other boards as well to exclude such a possibility.

I using 486 WinBIOS and some Pentium BIOSes.
That was correctly, also worked in 86Box.