40
Appendix B: System Resource
Interrupt Controller
The MB-73030 is a fully PC compatible control board, it consists of 16 ISA interrupt
request lines and most of them already in used by other part of the board. Both of ISA
and PCI expansion cards may need to use IRQs, please make sure that the IRQs do not
conflict if you would like to use extra add-on cards.
System IRQs are available to cards installed in the ISA expansion Bus first. Any
remaining IRQs then may be assigned to this PCI Bus. You are able to use the AMI
Diagnostic utility to see their map.
IRQ Assignment
IRQ0 System
Timer
Output
IRQ1 Keyboard
IRQ2 Interrupt
rerouting
from IRQ8 through IRQ15
IRQ3
Serial Port 2
IRQ4
Serial Port 1
IRQ5 PC/104+_1
IRQ6 Reserved
IRQ7 Printer
Port
IRQ8 Real
Time
Clock
IRQ9 ACPI
IRQ10 LAN2,
PC/104+_0
IRQ11
LAN1, PC/104+_2, PC/104+_3
IRQ12 PS/2
IRQ13 Math
Coprocessor
IRQ14
Primary IDE Controller
IRQ15 Reserved
I/O Map
The addresses shown in the table are typical locations.
I/O Port
Assignment
0 ~ F
AT DMA Controller
20 ~ 21
AT Interrupt Controller
40 ~ 43
82C54 Compatible Programmable Timer
60
8042 Compatible keyboard Controller
61
AT Style Speaker
64
8042 Compatible keyboard Controller
70 ~ 71
Real Time Clock
81 ~ 83
AT DMA Controller
87
AT DMA Controller
89 ~ 8B
AT DMA Controller
8F ~ 91
AT DMA Controller
A0 ~ A1
AT Interrupt Controller
C0 ~ DF
AT DMA Controller
F0 ~ FF
Math Coprocessor
1F0 ~ 1F7
IDE Controller
