Chapter 3 BIOS Setup
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CPC-1814CLD5NA-N
IO Port Address
There is 64K for the system I/O address space. Each peripheral will occupy portion of
the space. The table below shows parts of the distribution of the I/O address. As the
address of PCI device (e.g. PCI network card) is configured by software, it is not
listed in this table.
Address
Device Description
000h - 00Fh
DMA Controller #1
000h - CF7h
PCI Bus
010h - 01Fh
Motherboard Resource
020h - 021h
Programmable Interrupt Controller #1
022h - 03Fh
Motherboard Resource
040h - 043h
System Timer
044h - 05Fh
Motherboard Resource
060h
Standard 101/102 Key or Microsoft Natural PS/2 Keyboard
061h System
speaker
062h – 063h
Motherboard Resource
064h
Standard 101/102 Key or Microsoft Natural PS/2 Keyboard
065h - 06Fh
Motherboard Resource
070h - 071h
Real Time Clock, NMI
072h – 07Fh
Motherboard Resource
080h Motherboard
Resource
081h - 083h
DMA Controller #2
084h - 086h
Motherboard Resource
087h
DMA Controller #3
088h Motherboard
Resource
089h - 08Bh
DMA Controller #4
08Ch - 08Eh
Motherboard Resource
08Fh
DMA Controller #5
090h - 09Fh
Motherboard Resource
0A0h - 0A1h
Programmable Interrupt Controller #2