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To bus, or not to bus...

W

Woodchuck2000

Golden Member
Righty then.

Can someone who knows such things clarify the exact difference between a Bus and an Interconnect/Port/General-Non-Bus- Communication-method?

As far as I'm aware these are busses:
ISA
PCI
SCSI
USB (The clue's in the name)

And these are not:
AGP
SATA
PCIe

Is that correct?
Ta!
 
Busses have multiple agents that attach to the same set of common signals. Point-to-point connections aren't busses. End of story.

USB technically is not a bus.
 
I thought the topic was about car pooling and mass transportation :|
is the IDE ribbon a bus? USB is point to point only in implementation, one USB root will support many devices (up to 127 IIRC). But for multiple devices on the same USB cable you need to add USB hubs (a single USB cable is point-to-point)
 
Originally posted by: Woodchuck2000
Righty then.

Can someone who knows such things clarify the exact difference between a Bus and an Interconnect/Port/General-Non-Bus- Communication-method?

As far as I'm aware these are busses:
ISA
PCI
SCSI
USB (The clue's in the name)

And these are not:
AGP
SATA
PCIe

Is that correct?
Ta!
Click to expand...

You forgot IBM's Microchannel.

Also not on the list is Fiber Channel (Fcal), SAS, SCSI (which is a bus), 1394 (bus), AGP, EISA, VISA, and a few others that are evading my memory at this time.
 
IDE is a bus. Technically, it originally was an extension of the ISA bus, with predecoded address ranges for one controller chip in the (master) drive. Data lines are shared by both drives.
 
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