Category Archives: Technology

Really everything related to technology

Dissecting iPod Touch

iPod TouchiFixit ripped apart an iPod touch.

Unfortunately these guys continue to just publish lores camera images instead of hires scans, but this pic shows the (Samsung) chip with the Apple logo on it.

Apparently this has a Wolfson codec while the new iPod Classics use a Cirrus chip!

The touch and the iphone seems to have a lot in common internally. Not too surprising really...

The touch is a whopping 120 grams beast, while I thought the SanDisk Sansa e200 players were heavy with their 75 grams...

UFS in all devices!

Micro SDApparently a lot of electronics companies, including Nokia, Samsung, Sony Ericsson, Micron Technology, Spansion, MTMicroelectronics and Texas Instruments are planning to introduce yet another memory card due to release 2009. This time they call it "a common flash memory card format" (UFS - Universal Flash Storage) - which is kind of amusing in my view. Aren't all memory cards "common" in one sense?M2 card

JEDEC published a PDF press release about it, saying amongst other things:

"The UFS specification is expected to accommodate greater efficiency in the design of memory cards for card manufacturers and end-product designers. The standardized interface will also reduce the system design burden for embedded applications.

The next-generation flash memory specification is expected to be completed in the first half of 2009, with a draft specification available in the first half of 2008."

Anyway, decreasing the vast amount of various different formats could be good for end-users. Perhaps. We'll see...

DOS means Text Based

I find it very amusing that Windows users all so often refer to the command line as DOS, and I've tried to figure out how we still today frequently get to read users refer to the ancient operating system.

It was in fact still called "MS-DOS prompt" back in windows 98, as shown in this little picture:

windows 98 MS-DOS prompt

I found that even Microsoft themselves refer to the commands you use on the command line as "MS-DOS commands", so perhaps this is a primary reason? Even the producers of Windows confuse and mix the terms "command line" and "MS-DOS"...

When they launched Windows XP they no longer called it MS-DOS Prompt, it was then plain and simple "Command Prompt":

Windows XP command prompt!

We've also seen end users in the Rockbox project refer to the interface as DOS or DOS-style, and there is really nothing what so ever in common with MS-DOS in Rockbox. It is just (by default) a basic text-style interface. It is clear that to many people, a text-based interface be it a music player or a command line window, means DOS.

People are weird.

Form Submit Honeypot by Mistake

During the summer 2001, me and my wife toured Vietnam and we had a great time. For that occasion I set up a little online diary that would allow us to post entries while on the road, to allow our families and friends back home to be able to keep up with what we were doing.Boats in Vietnam

Fast forward to present day: the diary "submit new entry" form is still left on my site, and while it no longer works (it hasn't worked for many years) - it is still one of the most visited pages on my site! It seems the automated spam bots find it and submit crap to it... the crap doesn't end up anywhere to be seen nor is it even stored on the server, but it clearly identifies evil machines! Isn't that a honeypot as good as any?!

So far during September 2007, no less than 309 unique IP addresses have issued a POST on that page..

Picture Rockbox on a Camera

Canon Powershot A550Obviously the CHDK guys have working code for Canon's (and other's) Digic II powered cameras, and reading their wiki they use plain arm-elf for the job and... yeah so does Rockbox and... yeah, well it certainly at least opens a possibility for a Rockbox branch for these toys!

Of course there would be porting involved and I don't know how these cameras have on the audio front, but those are all just details...

Email wins over Forums

Wherever there are mailing lists, some people eventually bring up the suggestion to move to or to at least offer a web forum alternative as well.

As a subscriber to over 100 mailing lists, receiving several thousands of emails every day I'm a violent opponent of web forums. Why? I'll entertain you by stating a few reasons for my opinion on this:

  • If all my 100 lists would be forums, I would have to visit 100 sites to check for new messages. Some forums offer mail notifications on new messages, which would remove the need to poll all sites unconditionally, but that's still just a detail.
  • There's no way to mark individual message to deal with at a later time.
  • You're forced to use each and every specific forum "client" instead of a single dedicated and at your choice selected email client that was written and perfected for this purpose.
  • There are people who prefer mailing lists and those who prefer forums, I've come to accept that fact. Thus, when introducing forums as an alternative means for communication, you also risk draining people (and thus talk, opinions, facts) from the mailing list.

By reading thousands of mails per day, I've worked out a system on how to deal with them all. Like I filter them in 20+ inboxes on arrival and I read them in a prioritized order and I mark interesting mails as "important" to deal with them later in case I don't have time at the moment to reply or catch all details.

Several of my inboxes are automatically (renamed and) archived every month to make them not grow inconveniently large.

So please, don't start more forums. Use mailing lists. Oh, and don't top-post and/or full-quote on those lists...

Manufacturers Hate Customers

I've been involved in the Rockbox project since before it was named Rockbox and in fact long before the first code as written. I've contributed to it pretty much over the years and I have a fair insight in how most of the ports have been made and what efforts that are behind them. Today, Rockbox runs on around 25 different digital music players.

The first ports of Rockbox was (in retrospect) rather easy since we took it to architectures what were made with circuits and chips for which we could find documentation online.

Recently, music players as well as other consumer electronics are being made using products and circuits from companies that blatantly refuse to hand out documentation. Companies such as PortalPlayer (now Nvidia), Austrian Micro Systems, Samsung, ALI, NEC, Broadcom, Telechip, Texas Instruments, Sigmatel (to name a few) all make interesting and fun hardware but...

Let's say I am looking into alternatives when creating new hardware. I want to build something new and cool. Something not done before, that would be portable and feature sound and an LCD and whatnot. I see what cool manufacturers there are out there and I can read their propaganda on their fancy web sites. So, I want to compare company A's fancy chip with company B's. I contact them in order to get to know as much as possible to be able to compare these beauties.

Data Sheet for a technical thing

No, you cannot get any docs. We will not tell you how our products are used until you sign up for a huge contract. These companies don't only require NDAs to be signed and similar, they simply won't let you get the docs no matter what if you're a small player and are just interested in comparing and evaluating products.

I've contacted several companies with this purpose in mind. I work with embedded products for companies doing products using such chips, so I would assume I should be the kind of person these companies would respond to with an open mind and a will to sell me their stuff. But they clearly hate customers.

This problem is of course also tightly related with the eternal discussion of manufacturers not wanting to hand out docs to hardware they sell for PCs, such as graphic cards (AMD/ATI, Nvidia, etc) and network cards (Broadcom, etc). These companies usually hide behind a blurry statement about protecting their intellectual property and being afraid of ending up in the hands of the competition but that always and unconditionally end up with the arguments:

  • The competitors can get this info anyway by simply acting like a big customer, or possibly by buying the info from an existing customer. This protection only hides the info from the little people, not from the big guys with resources.
  • Getting information from the hardware based on a detailed description on how to use it is quite frankly a very ineffective way of cloning someone else's design and not a likely scenario.
  • Development in these areas is at such a high speed these days, so getting the docs for the current hardware give hardly any competitive edge since the mere operation of copying it to make an own version of it takes a long time and by the time it would be done it would already be outdated.

I sometimes wonder if the chip manufacturers do this on demand from their bigger customers, the consumer electronics companies, to help them keep things hidden so that we - the general public - will have a harder time to modify and/or reverse engineer their products, which may lead to additional support issues for them.

We see this development of secret-docs going in the wrong direction. Samsung used to publish a lot of docs for their ARM-core based microcontrollers, but they no longer do so. Marvell bought the Xscale family from Intel and recently they took away all the public docs for them...

We see "open source" projects (like Neuros uses TI chips) go with these companies so that they can't reveal all source code.nvidia chip

Luckily, not everything is darkness. There are occasional bright spots, as the other day when AMD announced their intention of bringing their open source ATI drivers up to speed with what could be expected of them..

So what is there to do about this? What can we "little people" do to change these big evil corporations? There's really only one way: put the money where the docs is! Buy stuff from the good companies. Recommend your clients to release docs openly. Recommend your clients to buy hardware (parts) from companies that host their documentation publicly.

Break Out Of That Proxy

SSH proxy functionality overview

Far too often we end up behind a proxy that limits our network access in one or more ways. There are however clever ways that in most cases allow us to work around the nuisances the proxies impose, and I've written down my "guide" on how to do it here!

This is a procedure I've used myself many times and I've ended up explaining it to others several times as well so I felt it was about time I wrote it down.

I've tried to catch most quirks and be detailed and accurate, but please point out if you find any errors or mistakes in there. I hope to be able to perhaps add more specific config examples and command lines as well to make it even easier to follow.

Full-Screen is Hip

iPod Touch

Clearly the major electronic device companies are starting to really like full-screen touch displays for their phones and media devices, and we see them coming from all directions now:

Apple's iPhone, and its sibling the recently announced ipod Touch, the Nokia concept phone, LD prada, HTC touch, Creative Zen "touch" and I bet we'll soon see more from other manufacturers following. Like Samsung, Philips, Sony Ericsson and the likes...

We've seen devices like Arhos 604 and the Acer MP-500 before but I think what we see now with Apple's iphone lead is the final step of the ladder and all the prime companies follow suit.