On Mon, Feb 05, 2001 at 02:41:44PM -0800, Adam J. Richter wrote:
> >Yes. That is, IEEE 1284.3-compatible daisy chaining devices generally
> >have IEEE 1284 Device IDs.
>
> I mean, is it true that any IEEE-1284.3 can hang off of a
> daisy chain, or only a cerain unusual devices specifically designed
> for this purpose (for example, could I hang random printers off of
> such a daisy chain)?
IEEE 1284.3 is a specification for daisy-chaining (and multiplexing)
devices on a parallel port. It allows for four devices who are 'in on
it' and have their own pass-through ports, plus one on the end that is
entirely unaware of the upstream devices: this is where the printer
goes.
That said, it's not true that all daisy-chaining devices are IEEE
1284.3 compliant: the original ZIP drives, for example, used their own
protocol, and there are probably other examples. But I think that
most of these types of devices are also not IEEE 1284 compliant and
won't have Device IDs anyway.
> The mismatch would be a compiler warning, not a compiler
> error. The old code would compile and continue to work.
Yes, you are right I think, for Intel. I can never remember which
order parameters get pushed on the stack.
Tim.
*/
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