RE: what is Hex?
- From: "Chris Hofstader" <chris.hofstader@xxxxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Thu, 21 Feb 2008 06:46:46 -0500
Oh poop, I had forgotten this when I wrote my earlier message. I guess we
used 3 bits to store the year.
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Sina Bahram
Sent: Wednesday, February 20, 2008 9:52 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: RE: what is Hex?
This isn't possible ... octal is only three bits long, and there are 8 bits
in a byte.
Given a shift and a mask, you can address each bit in a byte using a maximum
of one octal number ... maybe that's what you mean?
Take care,
Sina
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Dale Leavens
Sent: Wednesday, February 20, 2008 4:01 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: what is Hex?
You use two octal numbers, one for the upper and one for the lower nibble of
a byte. Frankly I have never really used octal notation for anything
serious. There may well be other uses.
----- Original Message -----
From: <yarringt@xxxxxxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Wednesday, February 20, 2008 1:37 PM
Subject: Re: what is Hex?
> I'm confused. I get using a hex number to represent the upper and
> lower nibble of a byte, but how could you use an octal number to
> represent the upper and lower nibble, or a 4-bit register value?
> -Debbie
>
> Dale Leavens wrote:
>> Close,
>>
>> Hex (hexadecimal) is base 16 and it is used because of the
>> architecture of computers where a byte is made up of 8 bits. Rather
>> than represent the position of 1s and 0s as an 8 bit binary number
>> you can represent the contents of the byte with a Hexadecimal number.
>> Octal (base 8) was and is sometimes also used to represent the upper
>> or lower nibble of a byte or the value of a 4 bit register.
>>
>> Hope this informs.
>> .
>
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