At 09:04 -0700 5/18/09, Ken Daggett wrote: >On 18 May 2009, at 08:26:16 PDT, Dan wrote: >> Each USB bus supports up to 64 devices.
>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. >The article seemed to say that the allocation was such that the >sum of 5 devices "consumed" the allocation of power to one port. > >Thus, plugging in a hub took one "allocation" and each port of >the hub got one. I have never seen a USB hub with more than >4 ports. Seemed to make sense. There are such things as powered hubs. They get extra power from somewhere - usually from a wall-wart - and use that to provide for required power on as many ports as they care to support. Well, the entire bus is still limited to the addressing limit above. -- Applescript syntax is like English spelling: Roughly, though not thoroughly, thought through. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
