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I don't about your tools habits but you can convert negative numbers to positive (bit equivalent):
e.g. for n bits negative values (signed)
data = data + 2^n
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Thank's for your answer, but I did it and I got the following picture it Questa.
I can't submit it like a signed number. In radix I use decimal, but it also ansigned.
How can i transform it into unsigned?
http://s7.hostingkartinok.com/uploads/images/2014/11/504de2f5c58eae37f09eb5c10191f761.png (
http://hostingkartinok.com/show-image.php?id=504de2f5c58eae37f09eb5c10191f761)