identify Dallas chips

Dallas

dl $ info DS1287 DS1287	dl $ info DS1287/1187 DS1287/1187	dl $ info DS12885 DS12885	dl $ info DS1B2887 DS12B887

DS1187
DS1287 Realtime clock, 40 Byte RAM
DS1287A Realtime clock, 40 Byte RAM + RAM clear
DS1287/1187 Realtime clock
DS12885
DS12887 Realtime clock, 114 Byte RAM, successor of 1287
DS12887A Realtime clock, 114 Byte RAM + RAM clear
DS12B887 Realtime clock, 114 Byte RAM + RAM clear (used by ASUStek, identic to DS12887A)
DS12C887 Y2K fix

DS1385 NVRAM, RTC
DS17885 NVRAM