> From: Bill Pearce <billpearce@xxxxxxxxxx>
>
> Can a scsi connection be adapted directly to usb with out intervening
> elecronic stuff to translate?
No.
They are fundamentally different beasts.
The "S" in "USB" stands for "serial." That means that all the bits go out on
one wire in a continuous stream.
SCSI is a parallel connection. That means that sixteen separate wires carry
sixteen separate bits of information found in two computer bytes.
On top of that are timing considerations. USB is "asynchronous," which means
bits can travel at any speed, and start and stop at random. SCSI is
"synchronous," which means that the data are lock-stepped to a common clock.
So not only is some electronics necessary, it is pretty sophisticated
electronics, or more likely, a microprocessor.
This is why I suggested just getting an existing older computer to deal with
it, rather than some proprietary computer embedded in a "black box" adapter
that allows the two protocols to communicate together.
Jan
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