User's Manual

56 06/09/03 ReVolution User Manual 1.00
System Hardware Assignments
The ReVolution, like all computers based on standard IBM-compatible personal computer architecture, contains a set
of user hardware- and software-configurable resources. The system uses some of these resources for various
standard and optional features. The user can modify others.
This section describes the standard system resources, their use and assignment status.
The following table of Interrupt ReQuests (IRQs) are assigned by the BIOS. Plug-and-play operating systems
(Windows 98/2000/XP) may change the IRQ assignments.
Table of IRQ Assignment by BIOS
IRQ Number Use Type Status
0 Timer ISA Permanent Assignment
1 Keyboard ISA Permanent Assignment
2 Programmable Interrupt
Controller
ISA Permanent Assignment
3 COM Port B (2) ISA BIOS enable/disable
4 COM Port A (1) ISA BIOS enable/disable
5 PNP/PCI
6 Floppy Disk ISA Permanent Assignment, if installed
7 LPT1 BIOS Adjustable
8 Real Time Clock ISA Permanent Assignment
9 ACPI EC ISA PNP/PCI Assignment
10 PNP/PCI
11 PNP/PCI
12 Mouse ISA BIOS enable/disable
13 Math Coprocessor ISA Permanent Assignment
14 IDE Controller ISA PCI/PNP assignment
15
DMA Channel Table
DMA Channel Use Status
0 Unused Available To User
1 Unused Available To User
2 Floppy Disk Permanent Assignment
3 ECP Parallel Port BIOS adjustable
4 DMA Controller Permanent Assignment
5 Unused Available To User
6 Unused Available To User
7 Unused Available To User