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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

COM 205Multimedia Applications

St. Joseph’s College

Fall 2003

chapter 4b

Chapter 4B

Hardware Peripherals

connections
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
slide5
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:
scsi continued
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
scsi continued1
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

slide8
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)
slide9
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
memory and storage
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….
random access memory ram and read only memory rom
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
storage devices
Storage Devices
  • Floppy and hard drives
  • Zip, Jazz, SyQuest removable cartridges, CD-R( recordable) discs,

videodiscs, DVDs, tape, other ….

output devices
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
communication devices
Communication Devices
  • Modems
  • ISDN – (Integrated Services Digital Network) – higher transmission

using T1,T3, ATM, DSL services

  • Cable modems
input devices
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