From: slavotinek@gmail.com   
      
   On 15.01.2023 18:37, IBMMuseum wrote:   
   > On another tangent, we haven't traced what the solder-pad header (differing   
   in size) is on the Type 1 and Type 2 planars, and the 2-pin jumper on the Type   
   2.   
      
   Yeah, will have to do some probing to figure that out. The rows of   
   solder pads might be just for testing, but the E3 jumper is actually   
   populated...   
      
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