Mark Junker wrote:
BTW: How does the "serenum" stuff works?
Serenum is an upper-level device filter driver. It is used to enumerate
devices connected to serial port.
Together serial and serenum provide functionality of a PnP bus driver.
There is a "Serenum Driver Reference
<senumref_1a4b2c57-95f0-488d-9fda-75a294e1495b.xml.htm>" in DDK.