Returns the virtual address (SPTR) of a process's process control block extension (PCBX).
pcbx (pin)
pcbx:sptr (pin:u16)
The process identification number (PIN) for which the address of the PCBX is to be returned. Note that this is a CM data structure.
$nmdebug > wl pcbx(8) $40010db0
If the PIN does not exist, the function result is undefined and an error status is set.
