104
Chapter 4: Technical Reference
System I/O Addresses
Table 4-21 shows the location in I/O space of all directly I/O-accessible registers.
Table 4-21
System I/O Addresses
Address(es)
Resource
Device
Notes
0000h - 000Fh
DMA Controller 1
PIIX4E
0010h - 001Fh
DMA Controller 1
PIIX4E
Aliased from 0000h - 000Fh
0020h - 0021h
Interrupt Controller 1
PIIX4E
0022h - 0023h
0024h - 0025h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
0026h - 0027h
0028h - 0029h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
002Ah - 002Bh
002Ch - 002Dh
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
002Eh - 002Fh
Super I/O Index and Data
Ports
0030h - 0031h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
0032h - 0033h
0034h - 0035h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
0036h - 0037h
0038h - 0039h
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
003Ah - 003Bh
003Ch - 003Dh
Interrupt Controller 1
PIIX4E
Aliased from 0020h - 0021h
003Eh - 003Fh
0040h - 0043h
Programmable Timers
PIIX4E
0044h - 004Fh
0050h - 0053h
Programmable Timers
PIIX4E
Aliased from 0040h - 0043h
Summary of Contents for 1400
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