User`s guide

A.2 PCI Sparse I/O Space
A.2.1.2 8242AH Keyboard and Mouse Controller Addresses
Table A–2 lists the register and memory addresses for the keyboard/mouse
controller.
Table A–2 Keyboard and Mouse Controller Addresses
Offset Physical Address Register
60-R 85.8000.0C00 Auxiliary/keyboard data
60-W 85.8000.0C00 Command data
64-R 85.8000.0C80 Read status
64-W 85.8000.0C80 Command
A.2.1.3 Time-of-Year (TOY) Clock Addresses
Table A–3 lists the register and memory addresses for the TOY clock device.
The time-of-year clock register is accessed by writing to address 70 with the
latched index. Then, reading from, or writing to, address 71 reads or writes the
register. For example, writing an 8 to address 70 followed by a read operation
from address 71 returns the value of the month. Writinga4toaddress 70
followed by a write operation to address 71 updates the hour register.
A–6 I/O Space Address Maps