Fedora Linux Support Community & Resources Center
  #1  
Old 26th June 2012, 04:05 AM
tashirosgt Offline
Registered User
 
Join Date: Aug 2004
Posts: 3,940
linuxfirefox
What is "legacy" USB in motherboard BIOSes?

I have several models of motherboards who BIOSes have settings related to "legacy" USB. The settings may mention "legacy USB mouse" or "legacy USB storage" or "legacy USB function". The default is invariabley "enabled". The motherboard manuals don't explain what "legacy" means in this context. What is it?
__________________
"Never let the task you are trying to accomplish distract you from the study of computers."
Reply With Quote
  #2  
Old 26th June 2012, 04:50 AM
Dan Offline
Administrator
 
Join Date: Jun 2006
Location: Paris, TX
Posts: 23,201
linuxfedorafirefox
Re: What is "legacy" USB in motherboard BIOSes?

This may help.

http://www.overclockers.com/forums/s...d.php?t=242655
Reply With Quote
  #3  
Old 26th June 2012, 08:47 AM
tashirosgt Offline
Registered User
 
Join Date: Aug 2004
Posts: 3,940
linuxfirefox
Re: What is "legacy" USB in motherboard BIOSes?

Quote:
Originally Posted by Dan View Post
Ah...what? The post that talks about HP support for USB sounds authoritative and irrelevant to motherboard BIOSes. The thought that "legacy USB" means USB 1.1 (or USB 2.0 now that there's a 3.0) is interesting, but I'd think that these standards would provide for backward compatibility. Can you disable support for 1.1 and still say your support USB 2.0?
__________________
"Never let the task you are trying to accomplish distract you from the study of computers."
Reply With Quote
  #4  
Old 26th June 2012, 01:41 PM
Dan Offline
Administrator
 
Join Date: Jun 2006
Location: Paris, TX
Posts: 23,201
linuxfirefox
Re: What is "legacy" USB in motherboard BIOSes?

From post number 6 on that page:

Quote:
"Legacy USB support provides USB functionality in environments where there normally is not USB support. Specifically, HP provides legacy USB functionality at:

* Power On Self Test (POST)
* ROM-Based Setup Utility (RBSU)
* Diagnostics
* Environments which do not support USB natively

USB devices support hot-plug at the OS level. USB devices also support hot-plugging the devices in legacy USB mode, but this feature requires additional ROM support. The table below shows what minimum ROM version is required for hot-plug functionality of USB devices in legacy mode. Servers that support legacy USB are enabled by default. To disable legacy USB support, complete USB functionality must be disabled by disabling the USB Host Controller in RBSU under PCI Devices.

Legacy USB support requires a system ROM that includes this functionality. All servers shipping in 2003 will have full USB support, meaning they will support keyboard, mouse, floppy, CD-ROM, and will support hot-plugging floppy and CD in legacy mode unless noted differently in the table below. The following table shows the minimum required ROM version to support legacy USB devices."


from:
http://h18004.www1.hp.com/products/s...b-support.html
Reply With Quote
  #5  
Old 26th June 2012, 02:25 PM
tashirosgt Offline
Registered User
 
Join Date: Aug 2004
Posts: 3,940
linuxfirefox
Re: What is "legacy" USB in motherboard BIOSes?

Quote:
Originally Posted by Dan View Post
From post number 6 on that page:
Quote:
"Legacy USB support provides USB functionality in environments where there normally is not USB support."
But how do motherboards with USB ports make sense as "environments where there normally is not USB support"?
__________________
"Never let the task you are trying to accomplish distract you from the study of computers."
Reply With Quote
  #6  
Old 26th June 2012, 07:28 PM
Yellowman
Guest
 
Posts: n/a
linuxfirefox
Re: What is "legacy" USB in motherboard BIOSes?

Quote:
Originally Posted by tashirosgt View Post
But how do motherboards with USB ports make sense as "environments where there normally is not USB support"?

Try this

http://www.usb.org/developers/devclass_docs/usb_le9.pdf
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
unpredictable "delete" "move to trash" or "cut" file menu option dorianrenato Using Fedora 1 21st November 2011 03:09 AM
Concerns/Questions about "Legacy" hardward (graphics Card) no longer supported. rlengland F15 Development 3 3rd May 2011 07:11 AM
yum "Cannot open/read repomd.xml file for repository: legacy-base" useche Using Fedora 8 1st October 2006 12:40 AM
Error:visibility arg must be one of "default", "hidden", "protected" or "internal" wangfeng Using Fedora 0 23rd May 2005 04:59 AM
Fedora Core 3 install solution "running /sbin/loader" with ASUS P4S533-MX motherboard whiterabbit Installation, Upgrades and Live Media 1 18th April 2005 01:29 AM


Current GMT-time: 16:56 (Thursday, 24-07-2014)

TopSubscribe to XML RSS for all Threads in all ForumsFedoraForumDotOrg Archive
logo

All trademarks, and forum posts in this site are property of their respective owner(s).
FedoraForum.org is privately owned and is not directly sponsored by the Fedora Project or Red Hat, Inc.

Privacy Policy | Term of Use | Posting Guidelines | Archive | Contact Us | Founding Members

Powered by vBulletin® Copyright ©2000 - 2012, vBulletin Solutions, Inc.

FedoraForum is Powered by RedHat