Re: PCI Interrupt and Acknowledgement

[Marco Brambilla <marco-tpa.brambilla@st.com>]

> |rising edge of int-acknowledge signal. This means that it takes 8 usec
> |to acknowledge the interrupt.

> |My question is that is this time is normal or long?

Lucky ;)

> Is it possible to shorten
> |this interrupt acknowledgement time?

Be warned that, under an heavily loaded windows machine, you risk the
interrupt latency be higher, due to the OS not serving the interrupts.

Somewhere in the Microsoft PC99 guidelines they said that some
milliseconds of latency is to be expected.

I recall someone on this list saying that they had to insert buffers for
a number of milliseconds.

Alas, no one really has real numbers (or keeps them as a trade secret).  

Ciao, Marco.

-- 
-------------------------------------------------------
 Marco BRAMBILLA   
            
 STMicroelectronics
 Via C. Olivetti, 2          
 20041 Agrate Brianza (MI)        
 ITALY                       
 
 TPA - Wireline Communications Division
 tel   : +39 039 603.6614   (ST Agrate - TINA 050 6614)
 mailto:marco-tpa.brambilla@st.com
-------------------------------------------------------