Alain BRAS RE: Questions on compact PCI

[Lame Brooks-G14738 <Brooks_Lame@mcg.mot.com>]

> I have several questions on compact PCI:
> Is it possible to plug two 3U boards in the same slot of a 6U 
> chassis ? 

Not usually, the chassis and backplane must be designed for this.

> What are the conditions to fulfill to be able to make data 
> transfers in burst mode ? Inside the same rack, and outside ? 

Same as for std form-factor PCI - protocol is the same.

> Do all off the shelves boards support burst mode ? 

Yes.

> With additional chassis, what is the loss in performance when 
> transfering data from one chassis to another one ? 
> How many chassis can be linked together ? 

Depends on how you are linking the chassis.  If via PCI, then you'll be
using a couple PCI-PCI bridges and you will experience behavior typical of
cascaded bridges.  

> Is there SCSI controllers that enable DMA data transfer from 
> hard disk to peripheral boards ? What are the performances ? 

Yes; good.  Look at PCI SCSI controller specs.

> Do you have some showcases of high performance application 
> based on compact PCI, with data transfer from hard disk to 
> peripheral board, with part list ? Typically, we need to 
> garanty an average of 50 Mbytes/s.
> Thank you very much in advance for your answers.

Uh, check with a sales person.

	-- BrooksL