Contains a rechargeable battery, five chips, a quartz crystal, a 8bit general-purpose I/O port (9pin male DSUB), and a few odds and ends.
The RTC is a HD146818 (which is a [[PC compatible RTC chip]]).
== Technical ==
Contains a HD146818P ([[PC compatible RTC chip|PC-style RTC]]), a TMP[[Z80 PIO|Z84C20]]P ([[Z80 PIO]]), three logic chips, an 8bit general-purpose I/O port (9pin male DSUB), and a rechargeable 3.6V battery. * Reportedly: DK-Tronics RTC module used the [[Z80 PIO]] chip to address the RTC itself as Port A of the PIO, with a 9-pin user i/o port as Port B.
FBE0h Dk'tronics Real Time Clock - probably [[Z80 PIO]] Port A Data ([[PC compatible RTC chip|HD146818P]] RTC Data bus)
== Timestamps ==
Time stamps - P2DOS and CP/M Plus support time stamps'''Below method uses Directory Entries with User Number 31 for Timestamps. Which should be incompatible with AMSDOS, which are so it is probably NOT used in the CPC. On the CPC, the timestamps <might> be maybe stored in each fourth directory entrythe bootstrap sectors... ?'''
'''This method uses Directory Entries with User Number 31 for Timestamps. Which should be incompatible with AMSDOSTime stamps - P2DOS and CP/M Plus support time stamps, so it is probably NOT used in the CPC. On the CPC, the timestamps <might> be maybe which are stored in the bootstrap sectors..each fourth directory entry.?'''
This entry contains the time stamps for the extents using the previous three directory entries. Note that you really have time stamps for each extent, no matter if it is the first extent of a file or not. The structure of time stamp entries is: