Changes
== Technical ==
Contains a HD146818P ([[PC compatible RTCchip|PC-style RTC]]), a TMP[[Z80 PIO|Z84C20]]P ([[Z80 PIO]]), three logic chips, 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)
FBE1h Dk'tronics Real Time Clock - MAYBE [[Z80 PIO]] Port B Data (General Purpose 8bit I/O Port)
FBE2h Dk'tronics Real Time Clock - MAYBE [[Z80 PIO]] Port A Control
