Acer 530 User Manual
Page 41
Chapter 1
33
Memory Address Map
Memory Address
Size
Function
00100000h-000F0000h
64KB
System BIOS
000CD000h-000C0000h
VGA BIOS
000C0000h-000A0000h
128 KB
Video memory (VRAM)
000A0000h-00000000h
640KB
Conventional memory
I/O Address Map
I/O Address
Function
000-00F
DMA controller-1
020-021
Interrupt controller-1
040-043
Timer 1
060, 064
Keyboard controller 38859 chip select
061
System speaker out
040B DMA
controller-1
061
System speaker
070-071
Real-time clock and NMI mask
080-08F
DMA page register
0A0-0A1
Interrupt controller-2
0C0-0DF
DMA controller-2
0F0-0FF
Numeric data processor
170-177
2nd EIDE device (CD-ROM) select
1F0-1F7
1st EIDE device (hard drive) select
220-22F
Audio
240-24F
Audio (optional)
278-27F
Parallel port 3
378,37A
Paraller port 1
3B0-3BB
3C0-3DF
Video Controller
3F0h-3F7
Standard Floppy Disk Controller
3F0-3F7
Floppy disk controller
480-48F, 4D6
DMA controller-1
4D0-4D1
CF8-CFF
PCI configuration register
IRQ Assignment Map
Interrupt Channel
Function(Hardware)
IRQ00
System timer
IRQ01
Keyboard
IRQ02
Programmable Interrup Controller
IRQ03
FIR
IRQ04
Communications Port (COM1)
IRQ05
Free
IRQ06
Standard Floppy Disk Controller
IRQ07
Free
IRQ08
Real Time Clock
IRQ09
ACPI Compliment System
IRQ10
SMBUS Controller
IRQ11
Free