Specifications

B–4 I/O Space Address Maps
Subject to Change – 17 January 1997
PCI Sparse I/O Space
3F8 0DLAB=1 85.8000.7F00 COM1 divisor latch (LSB)
3F9 1DLAB=0 85.8000.7F20 COM1 interrupt enable
3F9 1DLAB=1 85.8000.7F20 COM1 divisor latch (MSB)
3FA-R 85.8000.7F40 COM1 interrupt identification
3FA-W 85.8000.7F40 COM1 FIFO control
3FB 85.8000.7F60 COM1 line control
3FC 85.8000.7F80 COM1 modem control
3FD 85.8000.7FA0 COM1 line status
3FE 85.8000.7FC0 COM1 modem status
3FF 85.8000.7FE0 COM1 scratch pad
Keyboard and Mouse Registers
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
Time-of-Year Clock Registers
0 85.8000.0E00 Seconds
1 85.8000.0E00 Seconds alarm
2 85.8000.0E00 Minutes
3 85.8000.0E00 Minutes alarm
4 85.8000.0E00 Hour
5 85.8000.0E00 Hour alarm
6 85.8000.0E00 Day of week
7 85.8000.0E00 Day of month
8 85.8000.0E00 Month
9 85.8000.0E00 Year
Table B–1 (Continued) Combination Controller Register Address Space Map
Address Offset
Read/Write Physical Address Register