this is a picture of the motherboard of one of the x11 terminals
96% certain that what i have circled here is a jtag header
i am now 100% certain
figured out the pinout :D
header has been soldered
@hierarchon "mode select"
what it does varies based on what's happening on the bus
it's basically a trigger pin for whatever device is selected to do ... something
@lanodan the chipset actually does not have a uart at all
the serial ports on the board are provided by what i think is a pci serial device
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