PCI/ISA System Board
82
I/O Address Map
I/O AddressFunction
000-01FDMA Controller 1, 8237A-5
020-03FInterrupt Controller 1, 8259A, Master
040-05FTimer, 8254-2
060-06F8742 (Keyboard Controller)
070-07FReal-time Clock, NMI
(Non-maskable Interrupt) Mask
080-09FDMA Page Memory, 74LS612
0A0-08FInterrupt Controller 2, 8259A
0C0-0DFDMA Controller 2, 8237A-5
0E8Shadow RAM and Cache Control Bit
0F0Clear Numeric Processor
Extension Busy
0F1Reset Numeric Processor Extension
0F8-OFFNumeric Processor Extension
1F0-1F8Fixed Disk
200-207Game I/O
278-27FParallel Printer Port 2
2F8-2FFSerial Port 2
300-31FPrototype Card
360-36FReserved
378-37FParallel Printer Port 1
380-38FSDLC, Bisynchronous 2
3A0-3AFBisynchronous 1
3B0-3BFMonochrome Display and Printer Adapter
3C0-3CFReserved
3D0-3DFColor/Graphics Monitor Adapter
3F0-3F7Diskette Controller
3F8-3FFSerial Port 1

Note:

The I/O address hex 000 to 0FF are reserved for the

system board I/0. Hex 100 to 3FF are available on the

I/O channels.