-128 is 0x80
+127 is 0x7F

If in doubt, just look at the sawtooth correction messages coming out of your 
M12.

/tvb (i5s)

On May 18, 2014, at 4:17 PM, Chris Albertson <[email protected]> wrote:

>> Chris,
>> 
>> The manual clearly states -128 to +127. What's your problem with that?
> 
> Yes it gives that range.  It says the value is stored in 8 bits.
> 
> But how is it stored?  Certainly not as sign bit and 7 bit magnitude
> or you could not have -128.    They don't say but options are either
> an assumed bias of -128 or twos complement.    I bet it's an assumed
> bias.
> 
> 
> -- 
> 
> Chris Albertson
> Redondo Beach, California
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