Specifications

17 January 1997 – Subject to Change
I/O Space Address Maps B–3
PCI Sparse I/O Space
2FE 85.8000.5FC0 COM2 modem status
2FF 85.8000.5FE0 COM2 scratch pad
Parallel Port Registers
3BC-R/W 85.8000.7780 Data
3BD-R 85.8000.77A0 Status
3BE-R/W 85.8000.77C0 Control
3BF-R/W 85.8000.77E0 EPP address
3C0-R/W 85.8000.7800 EPP data 0
3C1-R/W 85.8000.7820 EPP data 1
3C2-R/W 85.8000.7840 EPP data 2
3C3-R/W 85.8000.7860 EPP data 3
Diskette Registers
3F0-R 85.8000.7E00 Status A
3F1-R 85.8000.7E20 Status B
3F2-R/W 85.8000.7E40 Digital output
3F3-R/W 85.8000.7E60 Tape drive
3F4-R 85.8000.7E80 Main status
3F4-W 85.8000.7E80 Data rate select
3F5-R/W 85.8000.7EA0 Data (FIFO)
3F6 85.8000.7EC0 None (tristate bus)
3F7-R 85.8000.7EE0 Digital input
3F7-W 85.8000.7EE0 Configuration control
COM1 Serial Port Registers
3F8-R
0DLAB=0
85.8000.7F00 COM1 receiver buffer
3F8-W
0DLAB=0
85.8000.7F00 COM1 transmitter holding
Table B–1 (Continued) Combination Controller Register Address Space Map
Address Offset
Read/Write Physical Address Register