Memory Map

The system memory map is shown in the following table.

 

 

 

System Memory Map

 

 

 

Memory Space

Size

Function

 

 

 

100000-18000000

383 MB

Extended memory

FC000-FFFFF

16 KB

Boot block

FA000-FBFFF

8

KB

ESCD (Plug and Play Configuration and DMI)

F9000-F9FFF

4

KB

Reserved for BIOS

F8000-F8FFF

4

KB

OEM logo or Scan User Flash

E8000-E7FFF

64 KB

POST BIOS

E0000-E7FFF

32

KB

POST BIOS (currently available as UMB)

C8000-D7FFF

96

KB

Available HI DOS memory (open to ISA and PCI bus)

A0000-C7FFF

160 KB

Video memory and BIOS

9FC00-9FFFF

1

KB

Extended BIOS data (movable by memory manager software)

80000-9FBFF

127 KB

Extended conventional memory

00000-7FFFF

512 KB

Conventional memory

 

 

 

 

I/O Addresses

The processor communicates with I/O devices by I/O mapping. The hexadecimal (hex) addresses of I/O devices are listed in the following table.

Note: In Plug and Play systems, these addresses are typical but may vary by configuration.

 

I/O Address Map

 

 

Address (Hex)

I/O Device Name

 

 

0000-000F

PIIX4 - DMA controller 1 (channel 0-3)

0020-0021

PIIX4 - interrupt controller 1

002E-002F

Super I/O controller configuration registers

0040-0043

PIIX4 - counter/timer 1

0048-004B

PIIX4 - counter/timer 2

0060

Keyboard controller byte - reset IRQ

0061

PIIX4 - NMI, speaker control

0064

Keyboard controller, command/status byte

 

 

4-18 System Board

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NEC VT 300i manual Addresses, System Memory Map, Address Map

VT 300i specifications

The NEC VT 300i is a versatile and compact LCD projector designed for educational environments and business presentations. With its impressive combination of features and user-friendly design, the VT 300i has made a mark as a reliable choice for professionals and educators alike.

One of the standout features of the VT 300i is its brightness. With a robust output of up to 3,000 ANSI lumens, the projector ensures that images are clear and vivid, even in well-lit rooms. This brightness level allows users to deliver impactful presentations without the concern of image washout due to ambient light conditions. Coupled with a high contrast ratio of 400:1, users can expect sharp, detailed images that enhance the overall viewing experience.

The VT 300i showcases advanced DLP projection technology, which is known for producing sharp images with excellent color accuracy. The inclusion of NEC’s proprietary Intelligent Auto Setup feature allows the projector to adjust to various input sources automatically, making setup quick and hassle-free. This ensures that even those who may not be tech-savvy can operate the device with ease.

Another notable characteristic is the VT 300i’s portability. Weighing in at a little over 5 pounds and featuring a compact design, the projector is easy to transport between different locations. This portability is further enhanced by its integrated carrying handle and durable casing, making it suitable for frequent travel.

The connectivity options of the VT 300i also cater to modern technology needs. It includes multiple input terminals, such as HDMI, VGA, and USB, enabling seamless integration with various devices like laptops, tablets, and other media players. Additionally, it supports both wired and wireless presentations, making it versatile for different presentation settings.

User-friendliness extends to the maintenance aspect as well. The VT 300i incorporates an easily accessible filter and lamp compartment, simplifying the process of replacements and ensuring minimal downtime. With a lamp life of up to 5,000 hours in eco mode, it offers longevity and cost-effectiveness.

In conclusion, the NEC VT 300i stands out with its combination of brightness, advanced projection technology, and user-friendly features. Whether in an educational setting or a business meeting, it offers reliability and quality, making it a popular choice for users seeking a competent and portable projector.