PDA

View Full Version : AppleUSBEHCI vs. AppleUSBOHCI


Sedulous
Nov 22, 2005, 08:18 PM
What is the difference between AppleUSBEHCI and AppleUSBOHCI? Is there any advantage to one over the other?

Dr. No
Nov 22, 2005, 08:56 PM
One is for USB 1.1 (OHCI), the other is for USB 2.0 (EHCI).

Where exactly did you see these drivers??

Sedulous
Nov 23, 2005, 07:10 PM
One is for USB 1.1 (OHCI), the other is for USB 2.0 (EHCI).

Where exactly did you see these drivers??

These things were found in Profiler under hardware/USB. Thanks, I didn't know even that much about the difference.

SmurfBoxMasta
Nov 24, 2005, 03:56 PM
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 :(