
PS-345XA Reference Manual
A-2
1
I/O Map
Address
AT System Device
System Device
0000H-001FH
DMA controller (8237)
0020H-003FH
Interrupt controller (8259A)
0040H-005FH
System timer (8254)
0060H-006FH
Keyboard controller
0070H-007FH
Real time clock, NMI mask
0080H-009FH
DMA page register
00A0H-00BFH
Interrupt controller 2 (8259A)
00C0H-00DFH
DMA controller 2 (8237)
00F0H-00FFH
Numeric data processor
01F0H-01FFH
Hard disk (IDE)
0290H-0297H
Reserved
System monitor
02E8H-02EFH
Reserved
Serial port 4 (COM4)
02F8H-02FFH
Serial port 2 (COM2): General use
03B0H-03BBH
Video controller (VGA)
03C0H-03DFH
Video controller (VGA)
03E8H-03EFH
Reserved
Serial port 3 (COM3)
03F8H-03FFH
Serial port 1 (COM1): General use
•
The resources of the PCI BUS board that is installed by the user are automatically assigned to
the free resource by the Plug and Play feature.