Apple II keyboard mods

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Apple II keyboard mods

I bought a non working Apple II, 

I discover a mess on the back side of the motherboard with a lot of wire (custom scart card on slot 7), 

There is also 1 wire from the 2nd pin of the keyboard connector connected to the mother board with like a custom ROM, 

Do someone knows what kind of keyboard mod it would be ? 

Thanks 

Vincent

 

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If by "keyboard connector"

If by "keyboard connector" you mean the pins between the actual keyboard and its daughterboard, then it's a shift key modification to allow upper/lower case input. 

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Some pictures would be

Some pictures would be helpful. Pin 2 of the keyboard connector is the keyboard strobe signal.

xot
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Probably a shift key mod

There are 25 pins connecting the keyboard to the keyboard encoder board. Pin 24 (second to last) has the shift key signal, so it sounds like a shift key modification. That usually works by jumping from there to the game port and making the shift key act as paddle button 2. Programs aware of the modification can use it for entering upper- and lowercase letters. Not sure what your reference to a custom ROM means without pictures. Could it be a pass-through connector for the game port?

Apple II and II Plus: Shift-Key Modification

 

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nijssen wrote:Some pictures
nijssen wrote:

Some pictures would be helpful. Pin 2 of the keyboard connector is the keyboard strobe signal.

 

Precisely! From what's written, we don't even know if the author is talking about an Apple II+ or an Apple IIe.

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Xot this is precisly the case

Xot this is precisly the case , the wire is connected to the gameport.

I am bringing back from the dead an Apple II+ Rev0 in a very bad shape

- Powersupply is dead: I changed the Rifa, other Caps, no voltage... I have tested some Resistor and it is very strange by 1W resistor are burt as well

-2x74LS174 dead

-2x 8T28

- 2x74LS194

 

And I have a custom RGB 'Peritel' on slot 7 with cut trace on the motherboard... 

 

A lot work ahead in a nutshell, 

 

Thanks for your answer

V

 

 

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