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Chapter 3 Hardware

CoreModule 430 Reference Manual 19

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) Subsystem

0000-000F Primary DMA Controller (#1)

0020-0021 Master Interrupt Controller (#1)

0040-0043 Programmable Interrupt Timer (Clock/Timer)

0060 Keyboard Controller

0061 ISA Standard Port B

0063 ISA Standard Port B alias

0064 Keyboard Controller

0065 ISA Standard Port B alias

0067 ISA Standard Port B alias

0069 ISA Standard Port B alias

006B ISA Standard Port B alias

006D ISA Standard Port B alias

006F ISA Standard Port B alias

0070-0071 RTC/ NMI enable

0080-008F DMA Page

00A0-00A1 Slave Interrupt Controller (#2)

00C0-00DF Secondary DMA Controller (#2)

00F0-00FF Math Coprocessor (only in the DX processor)

01F0-01F7 IDE 0 (can be disabled)

02E8-2FF Serial Port 4 (COM4) (base configuration @

3F8h/2F8h/3E8h/2E8h/10)

02F8-02FF Serial Port 2 (COM2) (base configuration @

3F8h/2F8h/3E8h/2E8h/10)

0378-037F LPT 1 (only in EPP modes, with default base address)

03E8-3EF Serial Port 3 (COM3) (base configuration @

3F8h/2F8h/3E8h/2E8h/10)

03F6 IDE 0 (see 1F0)

03F8-03FF Serial Port 1 (COM1) (base configuration @

3F8h/2F8h/3E8h/2E8h/10)

0778-077A LPT 1 (only in EPP modes, with default base address)

0CF8 PCI Configuration Address

0CFC-0CFF PCI Configuration Data

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 55 56

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