Q: Is there any real-time clock available?
From Hardware
Suitable Solutions released an upgrade in 1986 called ClikClok. The upgrade, which worked only in 100B's and 100+'s, involved the removal ROM 2 (closest to external video port) and the insertion of a tiny device containing a chip and a battery. The ROM was then placed on top of the ClikClok device. It was packaged with a driver program for MS-DOS which would update the system's clock to the ClikClok's time. The ClikClok is relatively rare.