Chapter 3
I/O Address Map
Table 3-4
shows the I/O address map. These are DOS-level addresses. The OS typically hides these physical
addresses by way of memory management.
Table 3-4. I/O Address Map
Address (hex)
0000-000F
0020-0021
0040-0043
0060
0061
0063
0064
0065
0067
0069
006B
006D
006F
0070-0071
0080-008F
00A0-00A1
00C0-00DF
00F0-00FF
01F0-01F7
02E8-2FF
02F8-02FF
0378-037F
03E8-3EF
03F6
03F8-03FF
0778-077A
0CF8
0CFC-0CFF
CoreModule 430
Subsystem
Primary DMA Controller (#1)
Master Interrupt Controller (#1)
Programmable Interrupt Timer (Clock/Timer)
Keyboard Controller
ISA Standard Port B
ISA Standard Port B alias
Keyboard Controller
ISA Standard Port B alias
ISA Standard Port B alias
ISA Standard Port B alias
ISA Standard Port B alias
ISA Standard Port B alias
ISA Standard Port B alias
RTC/ NMI enable
DMA Page
Slave Interrupt Controller (#2)
Secondary DMA Controller (#2)
Math Coprocessor (only in the DX processor)
IDE 0 (can be disabled)
Serial Port 4 (COM4) (base configuration @
3F8h/2F8h/3E8h/2E8h/10)
Serial Port 2 (COM2) (base configuration @
3F8h/2F8h/3E8h/2E8h/10)
LPT 1 (only in EPP modes, with default base address)
Serial Port 3 (COM3) (base configuration @
3F8h/2F8h/3E8h/2E8h/10)
IDE 0 (see 1F0)
Serial Port 1 (COM1) (base configuration @
3F8h/2F8h/3E8h/2E8h/10)
LPT 1 (only in EPP modes, with default base address)
PCI Configuration Address
PCI Configuration Data
Reference Manual
Hardware
19
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