[RedruM69] recently ran into a system with a dead Real Time Clock (RTC) module ... and 100 or so bytes of battery backed SRAM (before the days of cheap, plentiful flash memory).

If you did much dismantling of PCs back in the 1980s and 1990s, you might be familiar with the Dallas Semiconductor range of potted real-time clock modules. These were chunky dual-in-line devices ...

NetTimeLogic’s RTC Master Clock is a full hardware (FPGA) only implementation of a synchronization core allowing to read and write a I2C Realtime Clock (RTC) like the DS1307 or MCP7941x. Access to the ...