74ls161 error "No output connected to a wire ([1; Splitter]) the state of the wire is undefined"

[neineineinein]

how can i fix this?

[mengstr]

Pull up or down the A to D pins on the 161's as they are inputs and now don't have a defined voltage level. (You can right click on a chip and select "Open circuit" to see how they're made inside.)

[hneemann]

see also #36