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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.arch
Subject: Re: Byte Addressability And Beyond
Date: Wed, 8 May 2024 03:38:37 -0000 (UTC)
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On Wed, 8 May 2024 03:10:37 +0000, MitchAlsup1 wrote:

> Lawrence D'Oliveiro wrote:
> 
>> Consider how you specify these 3 conventions:
>> * numbering of bits within a byte
> 
> Most significant is bit[0] least significant is bit[2^k-1]
> 
>> * numbering of bytes within a multibyte quantity
> 
> Most significant byte[0] least significant byte[2^k-1]
> 
>> * the place values (powers of 2) of bits in an integer

Now you have to have place number = 2^k + 1 - i, where i is your bit 
number. So not only must the numbers be different, the relationship has to 
change depending on the size of the field!

In little-endian, both numbers can be the same, in big-endian, they can’t.