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©2002 Inova Computers GmbHPage 2-4 Doc. PD00581013.004
Configuration
ICP-PIII
2.1 I/O Mapped Peripherals
The original PC-XT and PC-AT desktop computer (ISA bus) specification allows for 10-bit I/O
addressed peripherals. This permits peripheral boards to be I/O mapped from 0h to 3FFh.
CompactPCI systems permit the full 16-bit addressing capability of the Intel 80x86 ‘processors,
from 0h to 0FFFFh.
All Inova CPU boards include peripheral devices requiring I/O address space on board and hence
the BIOS automatically assigns the I/O address required by peripheral boards and PCI devices at
boot time based on the requirements of each device. The assigned addresses can be determined
by reading the configuration address space registers using special software tools.
Description
$000 - $00F 8237 DMA controller #1
$020 - $021 8259 Master Interrupt Controller
$040 - $043 8254 Programmable Interrupt Timer
$060 - $06F 8042 Keyboard Controller
$070 – $071 CMOS RAM, NMI Mask Reg., RTC
$080 - $08B DMA page registers
$0A0 - $0BF 8259 Slave Interrupt Controller
$0C0 – $0DF 8237 DMA Controller #2
$0F0 Coprocessor Error Ignored Register
$170 - $177 *) Secondary Hard Disk Controller
$1F0 - $1F8 *) Primary Hard Disk Controller
$200 - $207 Reserved (Game Port)
$238 - $23B Bus Mouse
$2E0 - $2E7 Reserved (GPIB)
$2E8 - $2EF Reserved (Serial Port)
$2F8 - $2FF *) Serial Port (COM2)
$CF8 PCI Configuration Address
$CFC PCI Configuration Data
I/O Address
Table 2.10 Legacy I/O Map (ISA Compatible)