#5 Issue creating sub-circuit

[Alex Antonas]

Hello, I'm trying to build a circuit to use an 8-bit full-adder to perform binary subtraction. My adder and my 8-bit adders are working as they should, but when I try to use an instance of the 8 bit adder in my subtraction circuit, not all the inputs show up on the sub-circuit; the 8 bit adder takes 3 inputs (a control input and 2 8 bit binary integers) and has 2 outputs (an integer and a carry out).

attached are the pictures of each part of my project. Can someone help me figure out why this isn't working?

[Loek Lankhorst]

The black pins consist more then one bit (8 bits in your case). The black pin has 8 combined pins which can be splitted into 8 seperate pins with a "SPLITTER". the red pin is caused by not correctly connecting the (blue) input which create a error, you can provide that with a pull-down or pull-up resistor inside the subcircuit.

[Alex Antonas]

It has been a year and half! What!

2016年5月22日星期日，Loek Lankhorst llankhorst@users.sf.net 写道：

The black pins consist more then one bit (8 bits in your case). The black
pin has 8 combined pins which can be splitted into 8 seperate pins with a
"SPLITTER". the red pin is caused by not correctly connecting the (blue)
input which create a error, you can provide that with a pull-down or
pull-up resistor inside the subcircuit.

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• [support-requests:#5]
  https://sourceforge.net/p/circuit/support-requests/5/ Issue creating
  sub-circuit*

Status: open
Group: Version 2.0
Created: Fri Feb 13, 2015 05:36 PM UTC by Alex Antonas
Last Updated: Fri Feb 13, 2015 05:36 PM UTC
Owner: nobody
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Hello, I'm trying to build a circuit to use an 8-bit full-adder to perform
binary subtraction. My adder and my 8-bit adders are working as they
should, but when I try to use an instance of the 8 bit adder in my
subtraction circuit, not all the inputs show up on the sub-circuit; the 8
bit adder takes 3 inputs (a control input and 2 8 bit binary integers) and
has 2 outputs (an integer and a carry out).

attached are the pictures of each part of my project. Can someone help me
figure out why this isn't working?

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