From: Joe Chang (changjoe@earthlink.net)
Date: Tue Feb 04 2003 - 19:12:01 GMT-3
Thanks to all. I am not being sarcastic when I say somehow bit swapping has
been a traumatic topic for me...
----- Original Message -----
From: "Fred Ingham" <fingham@cox.net>
To: "Teisberg, Evan" <eteisbe@qwest.com>; "'Tony Schaffran'"
<tschaffran@cconlinelabs.com>; "Joe Chang" <changjoe@earthlink.net>;
<ccielab@groupstudy.com>
Sent: Tuesday, February 04, 2003 7:11 PM
Subject: Re: Bit swap?
> Evan: 1234.abcd.0000 converts to 482c.d5b3.0000. You need to reverse the
> nibbles after applying the conversion.
>
> Your binary conversion also misses the point that you reverse each byte,
not
> each nibble.
>
> 00010010 reverses to 01001000 i.e. 12 => 48
> 00110100 to 00101100 34 => 2c
> etc.
>
> cheers, Fred
> ----- Original Message -----
> From: "Teisberg, Evan" <eteisbe@qwest.com>
> To: "'Tony Schaffran'" <tschaffran@cconlinelabs.com>; "Joe Chang"
> <changjoe@earthlink.net>; <ccielab@groupstudy.com>
> Sent: Tuesday, February 04, 2003 4:19 PM
> Subject: RE: Bit swap?
>
>
> > I think that,
> > 1234 abcd 0000
> > converts to:
> > 84c2 5d3b 0000
> >
> > Just as,
> > 00010010 00110100 10101011 11001101 00000000 00000000
> > converts to:
> > 10000100 11000010 01011101 00111011 00000000 00000000
> >
> > Here is a good post from Richard Davison:
> >
> >
>
****************************************************************************
> > *********
> > "I'm sure a lot of you know this already but I think it's worth saying.
I
> > figured this out after my NMC class. If you remember the following you
> > never have to do binary conversion for canonical to non-canonical. Just
> > draw the chart before doing any conversion. I even find I can do the
> > conversion in my head now."
> >
> > 0 6 9 F Map to them selves
> >
> > -------------------
> >
> > 1 8 map to each other
> >
> > 2 4 map to each other
> >
> > 3 C map to each other
> >
> > -------------------
> >
> > 5 A map to each other
> >
> > 7 E map to each other
> >
> > B D map to each other
> >
> >
>
****************************************************************************
> > *********
> > HTH,
> > -Evan.
> >
> > -----Original Message-----
> > From: Tony Schaffran [mailto:tschaffran@cconlinelabs.com]
> > Sent: Tuesday, February 04, 2003 2:25 PM
> > To: Joe Chang; ccielab@groupstudy.com
> > Subject: Re: Bit swap?
> >
> >
> > That looks right to me.
> >
> >
> >
> > Tony Schaffran
> > Network Analyst
> > CCNP, CCNA, CCDA,
> > NNCSS, NNCDS, CNE, MCSE
> >
> > www.cconlinelabs.com
> > "Your #1 choice for Cisco rack rentals."
> >
> >
> > ----- Original Message -----
> > From: "Joe Chang" <changjoe@earthlink.net>
> > To: <ccielab@groupstudy.com>
> > Sent: Tuesday, February 04, 2003 10:47 AM
> > Subject: Bit swap?
> >
> >
> > > Did I do the following bit swap correctly?
> > >
> > >
> > > 1234 abcd 0000
> > >
> > > is
> > >
> > > 00010010 00110100 10101011 11001101
> > >
> > > swapped:
> > >
> > > 01001000 00101100 11010101 10110011
> > >
> > > is
> > >
> > >
> > > .
> > .
> > .
.
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