USB and IEEE 1394

USB

USB is a serial interface technology intended to replace existing serial and parallel ports. The advantages of USB technology are increased interface speed, full Plug and Play support, and the ability to create a network of serial devices off a single serial port.

USB is a cable bus that supports data exchange between a host computer and a range of simultaneously accessible peripherals. The attached peripherals share USB bandwidth through a host-scheduled, token-based protocol. The bus allows peripherals to be attached, configured, used, and detached while the host and other peripherals are operating. This ability is referred to as dynamic (or hot) attachment and removal. USB is a low cost, simple, powerful solution to the input/output (I/O) problem.

Understanding USB Versions

Windows XP originally released with support for USB 1.1 controllers and devices. These devices supported low-speed and full-speed operation at 1.5 and 12 Mbps, respectively.

USB 2.0 provides support for the above two speeds, as well as for high-speed operation at 480 Mbps. Because USB 2.0 supports all these transfer rates, USB 2.0 is not the same as high-speed USB. only devices with the USB 2.0 Hi-speed logo support the 480 Mbps rate.

Limitations: The following limitations exist with USB and should be considered when troubleshooting issues with USB devices:

Bus-powered hubs cannot be plugged into other bus-powered hubs. A bus-powered hub is one which does not have its own power source.

Devices requiring a large amount of bus power cannot be plugged into bus-powered hubs.

Cable segment lengths between any device, hub, or host controller is limited to no more than 5 meters.

The USB 1.1 specification limits the number of simultaneously connected devices to 127. Several self-powered hubs connected to each of the root hubs may be required to get this number of devices.

Troubleshooting USB

Yoga Dvd 34 Minutes

Backup Xbox 360 Downloads

Xbox 360 boasts hard-hitting games in its console. Utilizing its powerful processor and graphic capabilities, It has some of the best games around. These top seller games include Call of duty 2, Ghost recon advanced warfare, the elder scrolls IV: Oblivion, Dead or Alive 4, Saints row, Gears of war and the best-selling game Halo 3. These are just a sample of the games for the new Xbox and there are lots more of titles available not only in the market but also in the internet for download.

If you have these games, it will surely pass around friends that have an Xbox 360. Its breath taking graphics and heart pounding action will surely make you play the game again and again. But due the fact that the Microsoft xbox360 is causing a lot of trouble on game discs like scratches due the malfunction of several dvd-drives and therefore you should be able to backup your own copy.

Here's a quick guide on how to do it:

Requirements:

1) A dvd-drive which can be easily taken apart
2) Your xbox360 game
3) Data/Movie dvd which is at least 8gigabyte in size
4) Philips screwdriver to open your dvd-drive
5) WxRipper can be found @ http://www.360-scene.org/
6) Optional: Wx360 which can be found @ http://www.360-scene.org/
7) Last but not least, some patience

1: Take your dvd-drive apart

First, we need to access the laser unit of our dvd-drive, this can usually be done by removing the screws which holds it casing.

2: Installing your dvd-drive

The hardest part is over now and we should now connect our dvd-drive to the computer and place it on an easy accessible place.

3: WxRipper

By now you should have extracted both files mentioned earlier and have them installed on your computer, and then run WxRipper.

a) Put your dvd in the drive which is over 8 gigabyte and wait until your computer recognized it.

b) From the menu select Hotswap and then "Find magic number".

c) After the magic number has been found you select "Stop drive".

d) Now comes the magic part, you need to switch the dvd which is in your drive with your original game.

Warning: this needs to be done without pressing the eject button!!

e) When everything is back in place you can select "spin drive"

f) When the drive is spinning again then it is time to dump the image. Clicking on "start dump" can do this

g) You can take a break now as this stage can take a long time depending on the read speed of your DVD drive.

h) After it's done, you have now dumped your xbox360 game.
- The dumped image is an exact RAW copy of the original game disc, which means any dummy data is copied with this.
- You can now burn this .iso file to an empty dvd-r dl.

With this you can now play your favorite game over and over again without the fear that the disc will be damaged.

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