Re: Shared I/O address

[Alan Deikman <Alan.Deikman@znyx.com>]

>From: "John R Pierce" <pierce@hogranch.com>

>Daniele Pinto <pinto@spice.it> writes...

>>This is my situation: I've three device on three slot PCI.
>>I must send them a data in broadcast.
>>
>>I know that every device have a private I/O space.
>>How can I share some I/O address to execute broadcast transition?
>
>
>I don't believe thats possible.  Even if you forced a base register on each
>of the three devices to the same location, who would supply the target retry
>& ready handshake acknowlegements?

I spent some time thinking about this a couple of years back.  My
conclusion was that you could implement it in a special case
where the target devices are designed to work together.  They
would all have to have the same wait-state configuration, for
example.  You cannot do this with any old PCI device.  

Regards,

-----------------------
  Alan.Deikman@znyx.com