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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.arch
Subject: Re: Byte Addressability And Beyond
Date: Fri, 3 May 2024 03:02:20 -0000 (UTC)
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On Thu, 02 May 2024 17:21:30 GMT, Anton Ertl wrote:

> The 68000 and 88000 architectures (which have instructions with bit
> numbers) make the least significant bit have number 0, so they are
> bitwise little-endian.

The 68000 family is an example of the knots you can tie yourself into, 
trying to come up with bit numberings for a big-endian architecture.

The 16-bit members of the family (pre-68020) had single-bit extraction/
insertion instructions, which numbered the bits one way. The 32-bit 
machines added bit-field instructions, which used an entirely different 
bit numbering.