Specifications

Chipset and I/O Map
EPC-100 Hardware Reference A-3
Time-of-Day Clock
I/O Addr Functional group Usage
070 Real-time clock RTC index reg / NMI enable
071 RTC data register (64 bits)
0 seconds
1 seconds alarm
2 minutes
3 minutes alarm
4 hours
5 hours alarm
6 day of week
7 date of month
8 month
9 year
A status A
B status B
C status C
D status D
E…3F RAM
Phoenix NuBIOS
080 Phoenix BIOS Status Information