5.0.18 on 2.1.105 two controllers (MMAP Memory strangeness)

[Justin T. Gibbs]

In article <357F8E06.2C8970A8 at dialnet.net> you wrote:
> Mark Anthony Lisher wrote:
>> 
>> I have to scsi controlers (one on the motherboard). After upgrading to
>> 5.0.18 the 'MMAP Memory' has changed to 0x0 were as on the 5.0.13 it was
>> 0xcc800000 and scsi0 was at 0xcc802000.
>> 
>> Is this correct?
> 
> Yes, on 7850 class chipsets we disable the MMAPed I/O.  This was originally
> done for some buggy 7850 chipset cards, but it appears Justin's latest
> sequencer may make this unnecessay, so it may go back to normal later.


The only reason I know of to dissable memory mapped I/O for a 7850 is
if it is behind a PCI-PCI bridge that prevents it from working.  This
was the case on many laptop docking stations.  The real fix is for
the PCI code to notice the buggy bridge and prevent memory mapped
I/O enable requests from succeeding.

--
Justin

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