AppleUSBEHCI vs. AppleUSBOHCI

Discussion in 'Macintosh Computers' started by Sedulous, Nov 22, 2005.

  1. macrumors 65816

    Sedulous

    Joined:
    Dec 10, 2002
    #1
    What is the difference between AppleUSBEHCI and AppleUSBOHCI? Is there any advantage to one over the other?
     
  2. macrumors regular

    Joined:
    Sep 13, 2003
    #2
    One is for USB 1.1 (OHCI), the other is for USB 2.0 (EHCI).

    Where exactly did you see these drivers??
     
  3. thread starter macrumors 65816

    Sedulous

    Joined:
    Dec 10, 2002
    #3
    These things were found in Profiler under hardware/USB. Thanks, I didn't know even that much about the difference.
     
  4. macrumors 65816

    SmurfBoxMasta

    #4
    OHCI = Open Host Controller Interface
    EHCI = Enhanced Host Controller Interface

    They are both standard electrical/signal transfer/identifier protocols for how devices interact with your computer/OS through USB. If Apple had NOT adopted these a long time ago, we would still be using scsi, serial and ADB connections ect ect :(
     

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