I have an ABIT IC7-G motherboard with a total of 6 USB ports (I think it actually has 8 but what ever) and wondered how the USB bus was setup. Since I know for a fact that with one USB port (even for USB 1.1) you can daisey chain it for up to 127 devices. And with those 127 devices the bus has to be split 127 different ways. So thats either 1Mb/127 or 12Mb/127 depending on how far away the devices are. So it's obivous that having even one external HDD on USB 1.1 would be a bad but having more than 1 would be a nightmare. Now with USB 2.0, spliting it up wouldn't be so bad but still bad.
So here is my question; Since I have 6 USB ports coming right out of the motherboard instead of 1 or 2 like back in the Pentium/PII days, I want to know if each USB port on the back of the computer (or front) has a dedicated 480Mb bus or is it that that bus is 480Mb split up amongst 6 dedicated ports on the front/back of the computer?
I mean since I have a totally separate cable coming out of the 5/6 pin connectors to hook up into each of the USB external port/separate soldered I/O ports on the back of the motherboard that they would have a dedicated bus. With logic you would think they would have a dedicated bus per port but because of the design of the PCI bus for example where it's split up amongst devices, I'm worried that this is so with USB 2.0/1.1.
So here is my question; Since I have 6 USB ports coming right out of the motherboard instead of 1 or 2 like back in the Pentium/PII days, I want to know if each USB port on the back of the computer (or front) has a dedicated 480Mb bus or is it that that bus is 480Mb split up amongst 6 dedicated ports on the front/back of the computer?
I mean since I have a totally separate cable coming out of the 5/6 pin connectors to hook up into each of the USB external port/separate soldered I/O ports on the back of the motherboard that they would have a dedicated bus. With logic you would think they would have a dedicated bus per port but because of the design of the PCI bus for example where it's split up amongst devices, I'm worried that this is so with USB 2.0/1.1.