All Marvel sheeva CPU's got inbuilt RTC's. All you need to enabled them is to add 1.5V button cell and 32.768khz crystal. Both of them together cost 50cents at the max. But these people save that 50 cents making hackers like us crave.
As per the Marvell spec you can disable the rtc by grounding Xtal_in Xtal_out and rtc_Battery pin's
A RTC is a pleasant and almost necessity to any intelligent device. Yes we can sync to NTP but we shouldn't be living in 1970 if there is no NW.
In Dock star also that is the case. But the board is designed in such a way that these lines are grounded using a 0 ohm resister in the pcb. So all you need is to do is desolder those resistors and connect a crystal and a 1.5 battery to make the RTC ticking.
It took someone with enough resources to desolder the CPU and trace back the lines to discover this.viewtopic.php?f=6&t=258
So if someone can do the same with POGOPLUG devices we can do the same hack. Eagerly waiting for some help.....