2

On a Lenovo M81 motherboard there is a 15 pin header labelled "COM2".

15 pin header

I know that some serial interfaces can have 15 pins, but thought the most modern variation is 9 pin. I would have expected a 9 pin header on a fairly modern Core i5 PC. I can't find any 15 pin adapters that would convert this into a D-SUB 15 pin serial port.

What perplexes me further is that another, much older Lenovo 9702-7LG has a 9 pin header in the same place. This is also labelled COM2.

9 pin header

Why 15 pins?

And if I were to buy something like this: https://www.amazon.com/StarTech-com-16-Inch-Serial-Bracket-Header/dp/B007UQZD9K how would I connect this to the 15 pin header? Would I simply plug it into the right-most pins?

Andy Foster
  • 321

1 Answers1

1

If I remember correctly the 15pin port is "game port", not true serial port. Thus you can't convert it the way you are thinking.

Sometime I have seen them called "COM2" but that is a mistake on the board manufcaturer's side.

The correct cable and external port is this:

enter image description here

TomEus
  • 3,793