295 bytes added,
17:47, 3 January 2010 Almost nothing known about this.
== Info Fragment ==
Reportedly: DK-Tronics RTC module used a 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.
== I/O Ports ==
FBE0..FBE3 Dk'tronics Real Time Clock
FBE8 Dk'tronics Real Time Clock