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82 Resource Mapping
Leading
EDGE COMPUTING
B.6 System I/O Mapping
The following table lists the system I/O mapping.
I/O Range (Hex) Device
020h – 02Dh & 030h – 03Dh Interrupt controller 1, 8259 equivalent
02Eh – 02Fh Motherboard resource
040h – 043h & 050h – 053h System Timer
04Eh – 04Fh Motherboard resource
060h, 062h, 064h, 066h, 068h – 06Fh 8042 equivalent (keyboard)
061h, 063h, 065h, 067h
NMI control and status
070h – 077h
Real Time Clock Controller
(bit 7 – NMI mask)
092h Reset(Bit 0)/Fast Gate A20 (Bit 1)
0A0h – 0B1h & 0B4h – 0BDh Interrupt Controller 2, 8259 equivalent
0B2h and 0B3h APM control and status port
0E0h – 0EFh Available
0F0h Co-processor error register
2F8h – 2FFh Serial Port 2
3F8h – 3FFh Serial Port 1
378h – 37Fh Available
380h – 3AFh Available
4D0h Master PIC Edge/Level Trigger register
4D1h Slave PIC Edge/Level Trigger register
0A00h – 0A2Fh
Reserved for SIO functions base
address (e.g. PME/GPIO etc.)
0CF8h – 0CFBh
PCI configuration address register
(32-bit I/O only)
0CF9h Reset Controller register (8-bit I/O)
0CFCh – 0CFFh PCI configuration data register
1800h PM (ACPI) Base Address for SB