Since I know very little about building one of these things, I have included most of the files that are on the Tim's Timer RTC disk from Mystic Jim. I bought mine completely assembled, and I used the TYPE (E) chip (whatever that means). I so know that the TYPE (E) chips (or chematic or whatever) works perfectly with GEOS 1.2/1.3.2.0 and GEOS 128 2.0 in both modes. These files and programs were developed before the release of GEOS 2.0. Therefore I suspect that many of them, especially the V1.0 type things should not be used. Read all of the doc files to be sure what is going on, though. The REMINDER program that is included is a calendar type thingy that autoexecs and displays any reminders that are contained in the calendar's DATEBOOOK (if it's on the boot disk, of course), howver, I was unable to get it to work. You may have better luck.
If you have any questions or problems, please post a message on either of the General (128 or 64) message boards, or perhaps on the Programming board. Hopefully, someone out there will have an answer, cause I'm afraid I won't. :D