At 9:04 AM -0700 5/18/2009, Ken Daggett wrote: >On 18 May 2009, at 08:26:16 PDT, Dan wrote: > >> >> At 6:11 AM -0700 5/18/2009, Ken Daggett wrote: >>> You can only connect 4 devices (I Think it's 4, could be 5) to each >>> port, no matter how many ports a hub might have. >> >> Each USB bus supports up to 64 devices. >> >> In general, the limitation most people come against is power and > > throughput. > >That was my understanding, but I recall reading something about >"power allocation" that said that each connected device received >an allocation of power whether or not the device used that power.
Power is offered but doesn't have to be taken. By spec, a usb port offers 5 unit loads. A unit load is 5v at 100mA. Powered hubs can each do the same. >I have never seen a USB hub with more than 4 ports. I've got a 13-port hub on my Smurf right now. At times, it's had several levels of hubs connected... - Dan. -- - Psychoceramic Emeritus; South Jersey, USA, Earth --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com To unsubscribe from this group, send email to g3-5-list-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
