Start the DOSVM tick timer when the GET_SYSTEM_TIME interrupt (int 1a ah 00) is fired. This fixes a bug when running Sid Meier's CIVILIZATION for Windows 3.1 where the game would appear to hang at the launch screen (although sound would play as expected). This was due to the BIOSDATA.Ticks field never being updated.
I originally had written a version of this patch which moved away from using `BIOSDATA.Ticks` until I saw that the timer thread existed and seemed like a more sensible option.
-- v2: krnl386.exe16: Start DOSVM timer on GET_SYSTEM_TIME