David Gillett wrote:

>>Memory-addressed cards seems different... infact if, in order to change
>>the state of the MEMCS16, I must decode the SA17-SA23 address, I deduce
>>that my 16 bit memory mapped device  can be addressed only between
>>0x03FFFF and FFFFFF... is this right ?
>>
>>
>
>  Yes, and no.  I think addresses below 0x00FFFF are used for the IVT, and I
>suspect that 0x010000-0x03FFFF may be reserved for other uses, too.
>  On the other hand, addresses above 0x0FFFFF are available only from
>protected mode, as the result of decoding through a descriptor.  So
>depending on your target software platform, those may be out of bounds as
>well.
>
>David Gillett
>
>
>
Hi David...

I'm still confused... also because I don't know what IVT stay for....

of course... I forgot to tell that I'm working with Linux OS in kernel
space, as I'm writing a kernel driver.

thanks again for your support,

Giampaolo Bellini

                         PCBUILD's List Owners:
                      Bob Wright<[log in to unmask]>
                       Drew Dunn<[log in to unmask]>