Acer VD.T25V7.001 manual Memory Address Map, VGA Bios

Mechanical Specification

Item	Specification
Weight	2.56Kg (5.6 lbs) for 14.1 inch LCD with DVD model;
	2.69Kg (5.9 lbs) for 15.0 inch LCD with DVD model
I/O Ports	4 USB ports, 1 VGA (external monitor) port, 1 microphone-in jack, 1
	headphone-out jack, 1 Line-in jack, 1 RJ-11 modem jack, 1 RJ-45
	Ethernet jack, 1 PCMCIA (type II or type III) slot, 1 parallel port (ECP/
	EPP compliant), 1 DC-in jack for AC adapter, 1 easy replicator port, 1
	1394 port, 1 Smart Card slot, and 1 TV-out port
Drive Bays	One
Material	Plastic
Indicators	Power Mode LED, Battery Charge LED, Caps Lock, Num Lock, Media
	Activity LED, Bluetooth Activity and Wireless LAN Activity
Switch	Power

Memory Address Map

Memory Address	Size	Function
00100000h-000F0000h	512 KB	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
070-073	Real-time clock and NMI mask
080-08F	DMA page register
0A0-0A1	Interrupt controller-2
0C0-0DF	DMA controller-2
66, 62	Power management controller
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	Video Controller
3C0-3DF
3F0h-3F7	Standard Floppy Disk Controller
3F0-3F7	Floppy disk controller
480-48F, 4D6	DMA controller-1

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