[LinuxBIOS] Call for help: superiotool

Uwe Hermann uwe at hermann-uwe.de
Mon Oct 8 01:30:09 CEST 2007

On Sat, Oct 06, 2007 at 10:46:44PM -0400, Robinson Tryon wrote:
> Question about registers:
> In the datasheet for the FDC37M81x, registers 0x62,0x63 of COM2 have
> values marked for their hard reset (0x00,0x00).  In the 'Configuration
> Register' column, there is a note that these two registers are
> 'Reserved'.
> So, in this type of case should I mark the two registers with their
> given value, 0x00, or should I use RSVD?

Either is fine, I guess. So far I let RSVD "override" everything else, i.e.
as soon as I see a "Reserved" register, I make it RSVD, even if there's
a default value in the datasheet.

> What if the registers were marked with a dash (-) ?  Usually I would
> mark that as NANA, but if it's marked as reserved I assume I should
> use RSVD instead.


> Oh -- and what about the chip rev?  Usually there's no given value
> (because it would change with each chip), so I would mark it MISC, but
> I believe I saw that other people had marked the chip rev register as
> NANA.  Which is preferable, and why?

NANA, because there's no default. MISC would also be possible, but I
think NANA is more specific. It's a minor issue, though.

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