Posts in the “Clock/calendars” Category
The SmartWatch was a single-chip clock/calendar add-on that could be used by many computers, including the TRS‑80 Model I, III, and 4. The SmartWatch chip, a Dallas Semiconductor DS1216E, worked by replacing a 28-pin ROM and plugging the chip into its socket.
The Newclock-80 was a clock/calendar add-on for the TRS‑80 released by Alpha Products in 1983. It replaced their TIMEDATE 80 clock/calendar but remained software compatible with it.
The Newclock-80 plugged into the expansion bus and required no hardware modifications. The price was $59.95 for both the Model I and Model III versions, a significant reduction from the $95 price of the TIMEDATE 80. The Model III version also worked on the Model 4.