Hi Folks,

I have a problem with one of my network
adapters. Here are the details :

If i have 2 PCI adapters on 2 PCI buses (on the DELL
Precision 620 workstation they are on Bus 3 & 4). The
MemoryMapped IO Base Addresses assigned to them are :

Bus 3 Adapter: 0xF2000000
Bus 4 Adapter: 0xF2001000

Our adapters require 0x1000 (4K bytes) of PCI Config
Space. The problem is the adapter on Bus 3 does not
seem to be memory mapped. On the LogicAnalyzer we do
not see accesses to the device if i try to dump this
memory.

As a test, i put in some other adapters that get
mapped to different locations. But, using PCI.EXE i
remapped the MMIO Base addresses to the ones above &
the one on 0xF2000000 fails!! Also, on our adapters,
if i remap my address from 0xF2000000 to 0xF3000000,
it works!!

So, it implies that the address itself
is wrong. Now, i don't know why the BIOS is mapping
our device to this address!! What is based on (size)? Any clues?

thanx in advance..
HV

My first question would be, are they the same type of adapters? Same make/model, etc..?

next, why worry about the no#3 slot if it(they) work in another one? If you have no pressing need for them to be sychroniously placed, then simply move it to a diff slot and let the system BIOS determine the memory addressing by default, this will save you any IRQ/DMA conflicts down the road if you continue to try to manually map the memory addresses.

As a side note, i believe you're getting a little to technical for most in these forums; most of the people who come here are not into as advanced trble shooting as you are seeking-you'd be better off going to the system boards' manufacturer website for this kinda support. :)

yes, its the same adapter. well, if there is any problem related to 2 buses, we need to fix that. thats why, we gottu debug this.

just giving it a shot on this forum.. if some else had similar problems, i could benifit from that effort.

thanx
HV