Changes
RTC
,/* PC compatible RTC chip */
FBE0h Dk'tronics Real Time Clock - Z80 PIO Port A Data (HD146818P RTC Data bus)
FBE1h Dk'tronics Real Time Clock - Z80 PIO Port B Data, used for external control (General Purpose 8bit I/O Port)
FBE2h Dk'tronics Real Time Clock - Z80 PIO Port A Control (do not use as this will affect the RTC operation)
FBE3h Dk'tronics Real Time Clock - Z80 PIO Port B Control
FBE8h Dk'tronics Real Time Clock - Control port for RTC chip (4bit latch) (details unknown)
Do not use Port A as this will affect the RTC operation.
----
