Date: Mon, 30 Apr 2001 21:54:02 -0700 From: Dima Dorfman <dima@unixfreak.org> To: Warner Losh <imp@harmony.village.org> Cc: doc@freebsd.org, bde@freebsd.org Subject: Re: ddb addition review request Message-ID: <20010501045402.5C8B73E28@bazooka.unixfreak.org> In-Reply-To: <200105010348.f413m4R56040@harmony.village.org>; from imp@harmony.village.org on "Mon, 30 Apr 2001 21:48:04 -0600"
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Warner Losh <imp@harmony.village.org> writes:
> --- ddb.4 2001/03/09 03:07:53 1.12
> +++ ddb.4 2001/05/01 03:46:07
> @@ -522,6 +522,16 @@
> .Sq Li :
> and modifiers as described above.
> .El
> +.Sh HINTS
> +If you have a machine with an ISA bus, then you can connect a pushbutton
> +between A01 and B01 (CHCHK# and GND).
> +Shorting thse two signals together causes an NMI, which
^^^^ <-- these?
> +.Nm
> +will catch and dump you into the debugger.
> +Machines with outher buses, or other ways of generating an NMI can also
^^^^^^^ <-- intentional?
> +provide a hardware solution to break into a hung machine.
> +Some bridge chipsets do not actually generate a NMI on CHCHK#, so your
> +milage may vary.
Other than that, looks good.
Dima Dorfman
dima@unixfreak.org
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