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• The missing piece

  dustyhair • 06/25/2020 at 21:32 • 0 comments

  So what I am missing for sure is "SERIRQ". Some LPC implementations include it. For most of the motherboards that I have seen that include this signal in the LPC header it seems to be included already. I found a leaked pinout of the AM4 socket and decapped the cpu socket to get access to the pins (or holes as its an AMD).  I traced it to the "SuperIO" chip and found the pin I will need to jumper
  
  

  
  It doesn't seem to be broken out anywhere else. When I get my iron out of storage I will be able to find out if it will work.
  

• A lot of googling to start.

  dustyhair • 06/25/2020 at 19:14 • 0 comments

  The first thing I did was try and find a device that could do what I wanted. I found this https://www.digikey.com/product-detail/en/maxlinear-inc/XR28V382IL32-0A-EB/1016-1974-ND/4515332 which should be exactly what I need. Its too much of a device for what I need but It should serve as a proof of concept. I did need to purchase some 2.5mm to 2.0mm pin adapter cables to connect it to my motherboard.

  The second thing I found was what I thought was the right pin out for the LPC was incorrect. My manual did not have the pin out but after exhaustive searching I found this.

  Once I had it wired up correctly the serial ports were detected!

  However they did not function
  

  This is when the fun begins.
  

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