General Information 1-11
System Input/Output Addresses
This table shows the hexadecimal addresses for each of the system board
input/output (I/O) functions.
Table 1- 4 System Input / Output Addresses Table
Address range Function
0000-001F DMA controller 1
0020-003F Interrupt controller 1
0040-0047 System timer
0050-0057 System timer
0060-006F System controller 8742
0070 CMOS RAM address and NMI mask
0078-007B Real-time clock
0080-009F DMA page register
00A0-00BF Interrupt controller 2
00C0-00DF DMA controller 2
000F-00FF Math coprocessor
0170-0177, 0376 Secondary IDE controller
01F0-01F7, 03F6 Primary IDE controller
0200-0207 Joystick
0220-022F,
0388-0389,
0534-0537
Audio
0330-0333 MIDI
0278-027F Parallel port 2
02F8-022F Serial port 2
0378-037F Parallel port 1
03F0-03F7 Diskette drive controller
03F8-03FF Serial port 1/modem
0CF8 PCI mechanism #1 configuration address register
0CFC PCI mechanism #2 configuration data register
F000-F010 Bus master IDE
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