Cannot break into DDB

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

Hello

I have a 9.3/i386 kernel with DDB option built-in. 
I did sysctl -w hw.cnmagic=12345

Now on the console, if I type 123456 the 5 will be ommitted and I 
will not drop into DDB. It displays 12346

It does not folow hw.cnmagic value. For instance if hw.cnmagic=a
I can type as many a that I want on the console, I never drop into
DDB, and no a is ever displayed.

Anyone has an idea why?

Proof that DDB is built-in;
# sysctl ddb
ddb.radix = 16
ddb.maxoff = 1048576
ddb.maxwidth = 80
ddb.lines = 24
ddb.tabstops = 8
ddb.onpanic = 0
ddb.fromconsole = 0
ddb.tee_msgbuf = 0
ddb.commandonenter = 
ddb.panicstackframes = 65535
ddb.dumpstack = 1


-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost