====== AppleTalk and Time ======

===== ProDOS GET_TIME Behavior =====

Under some circumstances((at the very least, when booted over AppleTalk, maybe other times)), the Apple II Workstation Card will respond to the ProDOS GET_TIME call with a response retrieved from the server, but //only if MACHID bit 0 does **not** indicate clock is installed//.  This has the effect that regularly calling GET_TIME will keep the ProDOS time/date updated.

Unfortunately, there are many programs that check MACHID bit 0 and if it is unset, don't call GET_TIME before prompting the user to enter the date and time.  Thus the benefit is possibly erased if GET_TIME hasn't been called yet.

===== Time Zone =====

The Workstation Card firmware provides a system call to set a relative time zone offset from the AFP server.  However, none of the Workstation Card software allows setting this.

===== AppleTalk ConvertTime Call Behavior =====

The AppleTalk ConvertTime Call (call $34) remembers the seconds when converting from AFP format to ProDOS (which does not have a field for seconds).  A subsequent call to convert from ProDOS to AFP format will use the seconds to generate the AFP time.  If you thought, as I did, that you might try to get the number of seconds by doing a convert, then a convert back, and subtracting... well you have to have an intervening conversion that is exactly 0 seconds into the minute.

Note that Jan 1, 2000 12:00 AM is 0x00000000 in AFP time, so converting that to P8 time makes for a nice easy way to do it.