> Hello !! > > > When PCI Bus 64 bit Bus is it mendatory for all the BARS to be 64 bit?? No. > Or is it like this, for a 32 bit BAR match?? > > match_occured = (ad[63:32] == 0 ) && (mask[31:12] & ad[31:12] == > Bar[31:12]) Yes, except that if AD[63:32]==0, you won't get a DAC (dual address cycle). > Please give some real Idea on it!! > > Best rgds > Narayan Monish Shah Ascent Software