Alternating characters on Apple-1

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Alternating characters on Apple-1
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Hello everyone, I am new here and am getting desperate. I have a fully assembled Apple-1 with no additional capacitors or optimizations.

I haven't finished the "original" keyboard yet. I use the PS2 adapter or via VT100 with the Arduino/PIO adapter. With both adapters I get alternating characters on some keys. For example, with the key 2 (20202020...) or with the key . (.,.,.,.,.) I can't explain where this comes from. Basically, I have already changed everything. A friend of mine also has an Apple-1 with a similar configuration to mine and it works. Everything is also " default " at first.

Does anyone have any ideas?

 

-MoR33z

 

 

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How long is your keyboard

How long is your keyboard cable?  I have seen weird stuff like this on longer keyboard cables with the Apple-1

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As i said, i use the PS2

As i said, i use the PS2 Adapter (Normal PS2 Keyboard) or the Arduino/PIA Adapter (USB->PC->Tera Term VT100). The Same problem !

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I'm referencing the cable

I'm referencing the cable from the adapter to the Apple-1.  How long is that cable?

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OK i will check this later

OK i will check this later afternoon.

But why i have the same problmen with the Arduino/PIA adapter (USB-VT100) ?

 

-MoR33z

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Maybe I don't understand what

Maybe I don't understand what you are saying.

 

Can you post a picture of each setup?

 

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Keyboard Mismatch

Look at my Pictures. On both options, PS2 or the USB Adapter i got the same results on the screen. 202020202 if i press the Key "2".

 

 

 

 

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OK, I see what you mean about

OK, I see what you mean about the short cable, we can rule that out.  Before we dig deeper, have you tried a different 6821/6820?  Have you tried a simple plastic one?

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