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User’s Manual
90 ECB-862/862L User’s Manual
I/O – Map
Certain I/O addresses are subject to change during boot as PnP managers may relocate
devices or functions. The addresses shown in the table are typical locations.
I/O Port Description Note
0000h-000Fh Direct memory access controller
0010h-001Fh Motherboard resources
0020h-0021h Programmable interrupt controller
0022h-003Fh Motherboard resources
0040h-0043h
System timer
0044h-005Fh Motherboard resources
0060h-0060h Standard 101/102-Key or Microsoft Natural Keyboard
0061h-0061h System speaker
0062h-0063h Motherboard resources
0064h-0064h
Standard 101/102-Key or Microsoft Natural Keyboard
0065h-006Fh
Motherboard resources
0070h-0073h
System CMOS/real time clock
0074h-007Fh
Motherboard resources
0080h-0090h
Direct memory access controller
0091h-0093h Motherboard resources
0094h-009Fh Direct memory access controller
00A0h-00A1h
Programmable interrupt controller
00A2h-00BFh Motherboard resources
00C0h-00DFh Direct memory access controller
00E0h-00EFh Motherboard resources
00F0h-00FFh
Numeric data processor
0170h-0177h Secondary IDE controller (dual fifo)
0170h-0177h VIA Bus Master PCI IDE Controller
01F0h-01F7h
Primary IDE controller (dual fifo)
01F0h-01F7h VIA Bus Master PCI IDE Controller
02F8h-02FFh
Communications Port (COM2)
0376h-0376h VIA Bus Master PCI IDE Controller
0376h-0376h
Secondary IDE controller (dual fifo)
0378h-037Fh
Printer Port (LPT1)
03B0h-03BBh VIA Tech VT8361/VT8601 Graphics Controller
03C0h-03DFh VIA Tech VT8361/VT8601 Graphics Controller
03F0h-03F5h Standard Floppy Disk Controller
03F6h-03F6h Primary IDE controller (dual fifo)