What's an endian?

The terms big endian and little endian were originally borrowed from Gulliver's Travels by Jonathan Swift (dean of St Patrick´s Cathedral in Dublin btw), but are now used in computer science.

A computer's endian-ness defines in what way it stores data internally. Some processors store data with the high byte first (Big Endian), while others put it last (Little Endian). Some seem to mix and match (Middle Endian) while others still can switch between different endian-modes (Bi Endian). Ok, now I have probably confused you enough. Let's look at what the dictionaries say.

Techweb's dictionary defines Big Endian this way:

'The order of bytes in a word in which the most significant byte or digits are placed leftmost in the structure. This is the way humans deal with normal arithmetic. However, some CPUs are built using the little endian method, which is just the opposite and places the least significant digits on the left. Since numbers are calculated by the CPU starting with the least significant digits, little endian numbers are already set up for the required processing order.

A bi-endian machine, such as the PowerPC, is built to handle both types of byte ordering.
In the following example, the decimal number 23,041 (equivalent to 5A01 in hexadecimal) is shown in the big endian byte order and little endian byte order.'

      Big endian         Little endian
      (Motorola 680x0)   (Intel x86)
      5A01               015A
	

Other Endian definitions

Techweb:Byte Order

Jargon:Big Endian  Jargon:Middle Endian  Jargon:Little Endian

Rensselaer Polytechnic Institute

DAV's Endian FAQ (On holy wars and a plea for peace)

Some chips

      Chip              Endian-ness
      Motorola 680x0    Big
      Intel x86         Little
      Alpha             Bi
      PowerPC           Bi
	

The site

Endian.net covers high speed chips and operating systems regardless of endian-ness.

It is run by myself (Kenneth Ekman) and is not affiliated to any company or organization. Any opinions expressed are my own and does not represent any one else's views (except in rare cases when they happen to coincide). I graduated from the University of Linköping in 1993 and have worked in the telecom industry since.

The site also works as a test bed lab rat for various ASP/XML/SQL/HTML/CSS/XHTML/PHP/WML/WAP etc.. experiments.

All information is gathered from magazines and news sites and is given as-is. All content copyrights © belong to Kenneth Ekman except where otherwise indicated.

Graphics

A Edlund


No non-disclosure agreements were killed in the making of this site.

You are welcome to contribute

endian.net Mozilla Search-plugin Semi

Site News

0NaN-NaN-NaN Tech: The Intel Timeline page added to my old personal site

0NaN-NaN-NaN endian.net opens

0NaN-NaN-NaN WAP site launched

0NaN-NaN-NaN Added two news letters: weekly and daily

0NaN-NaN-NaN Converted database to more suitable format

0NaN-NaN-NaN You can find links to related roadmap items if you click the [rm] links in the news section.

0NaN-NaN-NaN The WAP site now have a search page.

0NaN-NaN-NaN The news.map page shows related roadmap items with each news story.

0NaN-NaN-NaN Added site news history database

0NaN-NaN-NaN Visual roadmap page added. Shows what is planned per month, quarter and half year.

0NaN-NaN-NaN WAP site enhanced with news ←→ roadmap crosslinks.

0NaN-NaN-NaN Added xml-coded quick specs to processors (not all quite yet...)

0NaN-NaN-NaN Added a quick specs compare page (reached from the details pages).

0NaN-NaN-NaN Added Quick Specs to lots of roadmap items

0NaN-NaN-NaN Added private log analysis page

0NaN-NaN-NaN Added robots.txt

0NaN-NaN-NaN Added compare links from roadmap and news details pages

0NaN-NaN-NaN Changed the site design. Let me know if it doesn’t work with your browser.

0NaN-NaN-NaN Added user settable site design.

0NaN-NaN-NaN User password reminder function added

0NaN-NaN-NaN Added recent updates to default roadmap page, and made a few other minor changes.

0NaN-NaN-NaN Now the latest daily and weekly newsletters are saved as previews.

0NaN-NaN-NaN Added the Roadmap Timeline page

0NaN-NaN-NaN RSS feed for test purposes added at http://endian.net/rssfeed.asp. Only includes news items so far. Contact me with any comments and requests.

0NaN-NaN-NaN Added description text to roadmap compare pages.

0NaN-NaN-NaN Moved south bridges and communications standards to new sections in the roadmap

0NaN-NaN-NaN Improved support for internal roadmap links

0NaN-NaN-NaN Improved roadmap item cross-linking support and made it available to WAP.

0NaN-NaN-NaN Added quick specs to south bridges

0NaN-NaN-NaN Added a RSS-feed for the roadmap section while the RSS-feed for the news section is updated. Still in beta-stage. Comments welcome.

0NaN-NaN-NaN Now editing the site from a 3GHz P4 with a Radeon 9800 Pro instead of my old steam-driven (450 MHz) PC... :)

0NaN-NaN-NaN Added Google ads to the site.

0NaN-NaN-NaN Updated the RssFeeds (roadmap and news)with bugfixes and enhancements.

0NaN-NaN-NaN Updated the newsfeeds, and actually tested with a feedreader (weak I know)...

0NaN-NaN-NaN Replaced the Roadmap Timeline with a more readable version.

0NaN-NaN-NaN Added support for multi-year timelines and removed the Overview page

0NaN-NaN-NaN XHTML-ified the site.

0NaN-NaN-NaN Added option to set Portable Mode from the Look page.

0NaN-NaN-NaN Added an inverted site look in beta form.

0NaN-NaN-NaN Added a CSS positioned layout to the site look options.

0NaN-NaN-NaN Added optional details to the Timeline page.

0NaN-NaN-NaN Made a new favicon.ico instead of the crappy one I used to have.

0NaN-NaN-NaN WAP site bug fixes (character and tag translation).

0NaN-NaN-NaN Moved the site from space2u.com to unisite.se.

0NaN-NaN-NaN Added setting for number of result lines of roadmap and news searches in look page.

0NaN-NaN-NaN Added option to subscribe to updates of specific roadmap items and related news items.

0NaN-NaN-NaN Fixed a couple of bugs in subscriptions, so that new users no longer have to log in again for subscriptions to be active. (If you have problems subscribing, please log in from the newsletter page).

0NaN-NaN-NaN Added roadmap and timeline links from details pages

0NaN-NaN-NaN Added forum part to roadmap details pages. Registered users may now add their input.

0NaN-NaN-NaN Changed the default look to the XHTML version. If you dont like it, you can change it from the Prefs page.

0NaN-NaN-NaN Added RSS list to links page

0NaN-NaN-NaN Changed news link sort on index page to sort by update time instead of news time.

0NaN-NaN-NaN Forum user interface no longer requires you to log in to enter comments.

0NaN-NaN-NaN Set look 11 (with fixed menu in Firefox) to default look.

0NaN-NaN-NaN Added direct roadmap links from emails.

0NaN-NaN-NaN Details pages now show current number of subscribers.

0NaN-NaN-NaN Removed forum from details pages.

0NaN-NaN-NaN Added a Mozilla - endian.net search plugin link to the about page.

0NaN-NaN-NaN Unfortunately the weekly and personal mails are currently having some problems. Bugsearch ongoing...

0NaN-NaN-NaN Email bug hopefully found and corrected. Happy New Year!

0NaN-NaN-NaN Started the dotnetification of endian.net

0NaN-NaN-NaN Launched .NET version of endian.net. Bugs may still be here. Please let me know if you see any of them crawl around...

0NaN-NaN-NaN A few bugs in the user login section straigtened out...

0NaN-NaN-NaN Found and corrected problems with feedback pages.

0NaN-NaN-NaN Corrected a few problems with the forum and subscriptions

0NaN-NaN-NaN Trying out horizontal Google link ad on top.