On 10/09/2013 09:42 PM, Nikolai Kondrashov wrote:
So definitely, Microsoft considers that the unit exponent is a 4 bits
two's complement, otherwise, the firmware will not get a Windows 8
certification.
I think this is due to their use of the "HID Descriptor Tool". Maybe
assuming it is a reference implementation, which it is not, but more likely
just not noticing the discrepancy.
I'll try to reach Microsoft on this and maybe make them correct their
specification.
I've started my attempts with a post on Microsoft's official hardware
development forums:
http://social.msdn.microsoft.com/Forums/windowshardware/en-US/e87d0db1-486e-42ae-bf95-d1ac5ffc0b02/unit-exponent-item-value-encoding-in-hid-report-descriptors?forum=whck
Let's see how it goes.
Sincerely,
Nick
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