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From: "Vinzent Hoefler" <0439279208b62c95f1880bf0f8776eeb@t-domaingrabbing.de>
Newsgroups: comp.lang.ada
Subject: Re: How do I write directly to a memory address?
Date: Wed, 09 Feb 2011 19:39:35 +0100
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Date: 2011-02-09T19:39:35+01:00
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Simon Wright wrote:

> "Vinzent Hoefler" <0439279208b62c95f1880bf0f8776eeb@t-domaingrabbing.de>
> writes:
>
>> Adam Beneschan wrote:
>>
>>> That's not the correct answer.  The correct answer is to ask, "Third
>>> bit from which end?"
>>
>> From the less significant end, unless you want the bit numbers to
>> change when assigned to different sized variables.
>
> Well, on big-endian hardware like standard PowerPC, they - in some sense
> - do.

No. Even although Ada has the somewhat flawed concept of Bit_Order, there
isn't any sense on turning it around. Bit 0 is the bit with the value 2**0,
Bit 1 is 2**1, ... and that's true on _every_ hardware, no matter on which
side of the chip the flip-flop storing the bit is located. ;)


Vinzent.

-- 
You know, we're sitting on four million pounds of fuel, one nuclear weapon,
and a thing that has 270,000 moving parts built by the lowest bidder.
Makes you feel good, doesn't it?
   --  Rockhound, "Armageddon"