Choose Start ➪ Run. The Run dialog box appears. 2. In the Open text box, type regedit.

Chapter 25 ✦ Understanding Multimedia Considering Digital Cameras and Scanners Although both scanners and digital cameras have been around a while, they’ve become the hottest new technological playthings for home users. With a scanner, you can convert any image from paper to a digital file that you can use in your computer. With a camera, you can capture images of your home, your family and friends, vacations, pets, and more. Both of these tools are affordable and easy enough for any member of your family to use, and they provide exciting alternatives to images you get from other sources. Examining digital cameras Digital cameras are perfect for taking photographs that you can transfer easily to your com- puter and to your publications. The photos you take with the digital camera are similar to those you take with other cameras. The pictures are in color, but you can transfer them to black and white with the help of a photo manipulation program. Digital cameras don’t use film. When you take pictures with a digital camera, the image is stored on a memory card instead of on film. You can view and delete images on the memory card while it’s still in the camera, and you can reuse the card time and again. The removable image card stores images and maintains those images until you delete the data or reformat the card. You also can purchase additional memory cards to use in your camera. After you take the pictures, you transfer the images to the computer by using a serial port, a USB port, a card reader, or FireWire. Using a serial port is the least effective method, because it is so slow. Using a USB port is faster, but using a card reader is by far the most efficient method. Your computer sees the card reader as another drive, as it would see a floppy disk, CD-ROM, or Zip drive. You simply open the drive and transfer the pictures you want. You remove the card from the camera and insert it into the card reader. The card reader is very small, about the size of a pack of poker cards, with two cables plugged into either side of the reader. Card readers are available in both internal and external models. The cost ranges from 50 to 150. Manufacturers include Kodak, Actiontec, and Litronic. IO addresses refer to locations in a computer’s memory map. Addresses are in hexadecimal for- mat, which is a base 16 numbering system that uses the digits 0 through 9 followed by the let- ters A through F. Hexadecimal numbers represent the binary numbers computers use internally they all fit into the 8-bit byte. Direct memory access DMA channels might be an area for hardware conflicts. Plug and Play systems use DMAs. In Windows, you can make Plug and Play resource assignments under the specific device’s Resource tab within the Device Manager click Start ➪ Programs ➪ Control Panel, and then double-click System. Select the Device Manager and locate the hardware in question. View its properties. You can change setting for IRQs, IOs, or DMAs, but make sure you under- stand the consequences of your actions and always write down the original addresses to change back to if necessary.