PCI WRITE TO XROM region

[Mohamad Tisani <mo@amcc.com>]

        HI 

THIS QUESTION is about write  cycles to the Expansion Rom Base Address 
region.( i am not referring to writes to the register itself ) 

if there is a write cycle to the region pointed to by the Expansion Rom 
Base Address ( PCI CONFIG OFFSET = 30) region what is the best thing to do 
:


1- do not assert devsel , as if the cycle is not yours 
2- assert devel & do a target abort 
3- write the data & change your eprom -- not pretty 

the ROM needed for this PCI controller have a certain method to change the 
ROM  through a back door way .( write address , write data , issue a 
command ) .

Thanks

***********************************
Mo Tisani , Senior Systems Engineer 
***********************************
email:   mo@amcc.com
phone#:  619 535 6505
Fax :    619 450 9885
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Applied Micro Circuits Corporation
6195 Lusk Blvd 
San Diego , CA 92121-2793 
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