Changes

The Smart Watch SmartWatch consists out of the RTC itself and an EPROM expansion with a lot of RSX commends. The RTC itself was inserted like an EPROM in any kind of ROM or EPROM card. Further it contains a little battery. At least one clock is still running in 2010!

== Dallas Semiconductors Smart Watch SmartWatch ==

The 28pin '''Forward: Whether or not the Dobbertin Smart Watch does actually contain chipset from Dallas Semiconductors SmartWatch''' (DS1216) is still unknown... The term "Smart Watch" and an adapter that can inserted in standard ROM sockets, a ROM chip can be mounted on the technique adapter, finally, inside of inserting the RTC into adapter is a ROM socket does indicate that the Dobbertin RTC has some relation 16pin '''Phantom Time Chip''' (DS1315). Normal memory reads are forwarded to the Dallas productpiggyback ROM... It might be exactly that hardwareAfter reading from a specific sequence of addresses, or similar compatible or incompatible hardwarethe ROM is disabled, or something entirely different..and data is instead read from the Phantom Chip via 1bit databus. can somebody verify which chip(s) are used in Writing to the Dobbertin RTC ?'''Phantom Chip is done by reading from a specific sequence of addresses, too.

The 28pin '''Smart Watch''' (DS1216) is an adapter that can inserted in standard ROM sockets, a ROM chip can be mounted on the adapter, finally, inside of the adapter is a 16pin '''Phantom Time Chip''' (DS1315). Normal memory reads are forwarded to the piggyback ROM. After reading from a specific sequence of addresses, the ROM is disabled, and data is instead read from the Phantom Chip via 1bit databus. Writing to the Phantom Chip is done by reading from a specific sequence of addresses, too. * [[Media:DS1216-smart-watch.pdf|DS1216-smart-watch.pdf]] - Dallas Datasheet for '''28pin Smart Watch Adapter'''* [[Media:DS1315-phantom-time-chip.pdf|DS1315-phantom-time-chip.pdf]] - Dallas Datasheet for '''16pin Phantom Time Chip'''* [[Media:DS1216-app-note-52.pdf|DS1216-app-note-52.pdf]] - Dallas Application Note on Smart Watch and Phantom Time Chip

The recognition pattern is: C5h,3Ah,A3h,5Ch,C5h,3Ah,A3h,5Ch.