On Thu, Jul 13, 2017 at 2:12 AM, Camiel Vanderhoeven via cctalk <cctalk@classiccmp.org> wrote:
> Only the last bit to shift out of the register will have passed through > all flip-flops; numbering the flip-flops in such a way that the flip-flop > furthest away from the output is the first flip-flop, a single missing bit > at the end of output could indicate a problem with either the output of > the first flip-flop, or the input of the second flip-flop. If two bits are > missing at the end, output of second flip-flop or input of third flip-flop. You're right, of course. I assumed a parallel input and then modeled a serial one. In my defence, it was late and there had been beer. ;) If I don't see any obvious dry joints, it might be best to just replace the register. I have another display card coming in the mail, too, which is another option. -- Robert
