I follow this great forum for a while now and decided to build an Apple 1 clone too.
After gathering the components all around the world, I finally reached the point where I could start the build. Everything worked fine at the beginning, but I am stuck now I guess. With all this vintage components and no logic analyzer, it is pretty though to search for errors.
So I built the terminal section piece by piece following the advice found here in the forum. I reached the point where, when I switch on the clone, the _@ characters appear. The @ is flashing. This is fine I guess.
Now when I press CLS, I only get a screen full of @ characters flashing. Nothing alse works from this point on. Reset does not work and I never got a single @ sign on the top left.
I already changed most components without any luck.
I also build a Keyboard and added the components for the computer section. Neither solved the issue.
An observation I made is, that if I power down the clone and turn it on immediately I receive random charaters on screen and the video output looks very noisy. I read that the random characters are normal behaviour.
Do you have any advice for me how to approach this issue?
Thank you very much.