Hi!
Iam new to PCI and do not have a clear idea regarding some general
concepts

first: what is the basic difference between Memory & I/O address
spacing? what are the advantages and disadvantages of each over the
other and when one is more suitable over the other.

Second: What are posted writes, delayed reads and prefetched reads

third: what does one mean by images in PCI

I tried my level best to search answers for above questions on
net,but all my efforts are futile.I would be very glad if anyone can
answer these questions .Thanks in advance

Regards
Deepu