Port 22?

[1338_Alex]

In the Vexcode “vex_global.h” library, the normal 21 available ports are defined. However, there is also a port 22 defined:
extern const int32_t PORT22;
If port 22 is used it doesn’t throw any errors or return any special information from the terminal.

I’m not sure if this invisible port has a function or it is there for some other reason.
Does anyone know what function it has or why it is defined?

[Andrew_Strauss]

The ADI in the V5 is implemented on an internal port 22 with its own processor. I’m assuming this is so that the protocol / general electrical design can be reused for an external ADI, whenever that happens.