Re: Troubles with NCR controller (was: Unidentified subject!)

Maurice Hilarius (maurice@ellpspace.math.ualberta.ca)
Mon, 11 Nov 1996 16:19:43 -0700

At 03:38 hrs. 11-11-96 +0000, you wrote:
>
>On Sat, 9 Nov 1996, Michal Jaegermann wrote:
>
>> I used this driver, with very good results, for various kernels from
>> 2.0.x series and on Cabriolet and EB164 machines; but with the following
>> settings:
>>
>> CONFIG_SCSI_NCR53C8XX=y
>> CONFIG_SCSI_NCR53C8XX_TAGGED_QUEUE=y
>> # CONFIG_SCSI_NCR53C8XX_IOMAPPED is not set
>> # CONFIG_SCSI_NCR53C8XX_NO_DISCONNECT is not set
>> # CONFIG_SCSI_NCR53C8XX_FORCE_ASYNCHRONOUS is not set
>> CONFIG_SCSI_NCR53C8XX_FORCE_SYNC_NEGO=y
>> # CONFIG_SCSI_NCR53C8XX_DISABLE_MPARITY_CHECK is not set
>> # CONFIG_SCSI_NCR53C8XX_DISABLE_PARITY_CHECK is not set
>>
>> Double-negatives in configuration options require a careful parsing
>> when the first time. :-)
>
>I just choose 'N' as default answer for all driver options
>(Except CONFIG_SCSI_NCR53C8XX :)) because I thought that people will
>answer 'N' to options they will not understand.
>Unfortunately, it seems that I was wrong.
>
>Since version 1.14 of the driver (linux-2.1.3 or near) I have removed
>the stuff that enforced IOMAPPED for Alpha.
>As you know, under linux-2.0.X/Alpha, memory mapped io does not work.
>So, if you update the driver to 1.14 in a 2.0.X kernel, you _must_
>force NORMAL IO,
>
>i.e : CONFIG_SCSI_NCR53C8XX_IOMAPPED=y
>
>> Michal
>
>Gerard.
So, what would the visible effects be of _NOT_ setting this?

Cheers,
Maurice
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