User manual

BIOS Setup
EC3-1816CLD2NA(B) - 35 -
Address Device Description
000h – 001Fh DMA Controller #1
020h - 021h Programmable Interrupt Controller
040h - 043h System Timer
060h - 060h PS/2 standard keyboard
064h – 064h PS/2 standard keyboard
070h - 071h System CMOS/real-time clock
081h - 091h DMA controller
0A0h – 0A1h Programmable Interrupt Controller
0C0h – 0DFh DMA Controller
0F0h – 0FFh Numeric data processor
2E8h – 2EFh COM4
2F8h – 2FFh COM 2
3B0h – 3BBh Intel(R) Graphic Media Accelerator
3C0h – 3DFh Intel(R) Graphic Media Accelerator
3E8h – 3EFh COM 3
3F8h – 3FFh COM1
4D0h – 4D1h Programmable Interrupt Controller
D00h – FFFFh PCI Bus
 IRQ Assignment Table
There are 15 interrupt sources of the system. Some are occupied by the system
devices. Only the ones that are not occupied can be assigned to other devices. ISA
device requests exclusive use of its interrupt. Only the plug and play ISA devices can
be assigned by the UEFI or the OS. And several PCI devices share one interrupt,
which is assigned by UEFI or OS. Interrupt assignment of some devices of X86
platform is shown in the table below, but it does not show the interrupt source
occupied by the PCI devices