Can't fan-out an input pin

Posted by jephricon on Mar 05, 2014; 10:09am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Can-t-fan-out-an-input-pin-tp4027884.html



As part of my ALU implementation, I'm leveraging the zx flag to zero out the x bit as follows:
   
   //invert zx bit
   Not(in=zx,out=nzx);
   
   //And zx bit to x to, possibly, zero
   And16(a[0..15]=x[0..15], b[0..15]=nzx, out[0..15]=zxout[0..15]);


However, the Hardware simulator complains that the bus width of b(16) is different than nzx(1)!  I thought that the input pin could be fanned-out so that, effectively the syntax I'm using would assign the value of nzx to all of the b[0..15] pins.   Assigning b[0..15] to 'false' works.

Help?