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/* Technical info */
== Technical info ==
This is the technical application manual for the 72421 RTC chip used in uRTC-8. [[File:Rtc72421 appman.pdf]] Of particular interest are the 16 registers.:
RTCBASE .equ 0A0h ; Default uRTC base I/O address
rtcctrlE .db RTCBASE+0Eh ; control register E
rtcctrlF .db RTCBASE+0Fh ; control register F
