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COM 205 Multimedia Applications

COM 205 Multimedia Applications . St. Joseph’s College Fall 2003. Chapter 4B. Hardware Peripherals. Connections. SCSI - ( “scuzzy”) Small Computer System Interface Let’s you add disk drives, scanners,etc. IDE - Integrated Drive Electronics

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COM 205 Multimedia Applications

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  1. COM 205Multimedia Applications St. Joseph’s College Fall 2003

  2. Chapter 4B Hardware Peripherals

  3. Connections • SCSI - ( “scuzzy”) Small Computer System Interface • Let’s you add disk drives, scanners,etc. • IDE - Integrated Drive Electronics • Connects hard drives, CD-ROMs only internally • MCI - Media Control Interface • Provided by Window to enable software to talk to multimedia devices

  4. Computer-System Architecture

  5. SCSI • Can connect up to 8 devices in a “daisy chain” (ID ( 0-7)) • ID0 = hard drive, ID7= computer • Must avoid ID conflicts • Ultra SCSI allows up to 32 devices • Built into Mac, installed in PC • Some Macs have 2 SCSI buses • In PC mounted as another drive • Floppy = A: hard drive = C: • CD-Rom= D: SCSI = E:, F: G: H:

  6. SCSI ( continued) • Cabling is sensitive to length and resistance • Controller does not demand CPU time • Used to wire 2+ disks simultaneously • (Eg. for mirroring in servers) • SCSI Devices may be installed on PC or MAC • MAC reads PC format • PC will not read MAC format

  7. SCSI ( continued) • SCSI-1 8 bit bus, transfers data at 5MB/sec for <= 7 devices • SCSI-2 ( fast SCSI), • 8 bit bus at 10 MB/sec • Wide SCSI 16 bit bus 10 MB/sec • Fast/wide 16 bit bus, 20 MB/sec • SCSI-3 Ultra SCSI, 40 MB/sec for <= 32 devices Supports both internal and external devices

  8. IDE • Less expensive than SCSI • Connects ONLY internal devices • PC motherboard supports 2 IDE controllers • Each connects 2 devices (master/slave) • Can combine 4 hard drives, CD-ROMS, etc. • ( Floppy drive is on separate controller)

  9. MCI • Allows any hardware (or software) device to be connected to a computer running Windows, using the appropriate device drivers. • Devices and drivers are managed by the system.ini file • See table p.70 – 72 for examples

  10. Memory and Storage • 1945- John Von Neumann, “father of the computer”, agreed to 4K RAM for the ENIAC, but added “ this is more memory than you will ever need”. • 2001 – average 128K – 256K average and most agree that “You never have enough memory or disk space.” • Buy as much RAM and hard drive space as you can afford. Multimedia text, graphics, animation use a lot of both….

  11. Random Access Memory ( RAM)and Read-Only Memory (ROM) • MAC- minimum RAM for multimedia is 32 MB ( 64-256K are common) • MPC- 8MB is minimum under MPC3 but 16-20 might be required ( newer WindowsNT, 2000 need > 64MB) • ROM – not volatile – holds BIOS program • OROM- optical ROM – write once- used in hand held devices

  12. Storage Devices • Floppy and hard drives • Zip, Jazz, SyQuest removable cartridges, CD-R( recordable) discs, videodiscs, DVDs, tape, other ….

  13. Output Devices • Audio- built into MAC; sound boards installed into PCs • Amplifiers and Speakers • Monitors (some multimedia use multiple monitors for editing) • Video devices • Projectors • Printers

  14. Communication Devices • Modems • ISDN – (Integrated Services Digital Network) – higher transmission using T1,T3, ATM, DSL services • Cable modems

  15. Input Devices • Keyboards • Mice • Trackballs, and touch pads • Touch screens • Magnetic card readers ( “smart cards” • Graphics tablets • Scanners • OCR (optical character recognition) devices • Infrared remotes ( wireless) • Voice recognition • Digital cameras

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