Positive numbers presented mistakenly as negative in logisim -project 3

1

Hi,
I noticed that when I put MSB =1 in logisim, it shows as if the number presented is negative.
as a result my cuircut doesn’t work properly. (the reduction cuircut in project 3)
How do I change that ?

2

I’m not sure which component you are facing this issue with. For the explanation I’ll assume it’s a probe, but the general process is similar for all components. At most the exact labels/descriptions might be different.

This issue occurs because the probe assumes that the binary string is in signed two’s complement representation, by default. To change it to unsigned, do the following:

  1. Select the component
  2. In the left sidebar, search for Radix
  3. From the dropdown menu corresponding to Radix, select Unsigned Decimal