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Links for 2010-09-19

  • Bunnie Huang on the simulated 6502 : 'It makes my head spin to think that the CPU from the first real computer I used, the Apple II, is now simulateable at the mask level as a browser plug-in. Nothing to install, and it’s Open-licensed. How far we have come…a little more than a decade ago, completing a project like this would have resulted in a couple PhDs being awarded, or regarded as trade secret by some big EDA vendor. This is just unreal…but very cool!'
    (tags: simulation bunnie-huang 6502 cpu chips emulation hardware)

  • www.Visual6502.org : 'working from a single 6502, we exposed the silicon die, photographed its surface at high resolution and also photographed its substrate. Using these two highly detailed aligned photographs, we created vector polygon models of each of the chip's physical components - about 20,000 of them in total for the 6502. These components form circuits in a few simple ways according to how they contact each other, so by intersecting our polygons, we were able to create a complete digital model and transistor-level simulation of the chip. This model is very accurate and can run classic 6502 programs, including Atari games. By rendering our polygons with colors corresponding to their 'high' or 'low' logic state, we can show, visually, exactly how the chip operates: how it reads data and instructions from memory, how its registers and internal busses operate, and how toggling a single input pin (the 'clock') on and off drives the entire chip to step through a program and get things done.' Awesome
    (tags: 6502 emulation physics simulation mos atari-2600 pet commodore c-64 cpu silicon)

Links for 2010-09-13

Links for 2010-09-07

  • Game On : exhibition billing itself as "the world's biggest celebration of games", arrives in Dublin on Sep 20 at the Ambassador, on tour from its home in The Barbican Art Gallery in London. 'Enjoy a totally interactive experience with rare memorabilia and play your way through over 100 playable games from the arcade classics to the latest releases.' tix are EUR10
    (tags: games gaming exhibitions dublin)

  • Your Country, Your Call, You’re Doomed : Bock on the predictably-crap biz-waffle results from the YCYC "get Ireland back on track" competition. 'If we don’t take this seriously, we’re doomed to repeat the current economic disaster over and over again, each generation with its own Bertie Ahern, its own Seanie Fitzpatrick, its own Fingers Fingleton, and all the other assorted, integrity-free panhandlers and parasites who have soiled the reputation of this country and sold us down the Swanee for their own, ignorant, self-serving enrichment. Forget about Eamon Ryan’s smart economy. Let’s put all our effort into creating the Honest Economy.'
    (tags: ycyc waffle business ireland vision-lock integrity bock-the-robber economy)

Links for 2010-09-06

Links for 2010-09-02

Links for 2010-09-01

Links for 2010-08-30

Links for 2010-08-27

Links for 2010-08-26

Links for 2010-08-24

Links for 2010-08-23

Links for 2010-08-17

  • Books of Adam : stories drawn by a guy I vaguely know online. really funny!
    (tags: blog comic funny fp)

  • 100 ways to spend the Anglo €25,000,000,000 : 'just how much is €25 billion that [Ireland's taxpayers] have to borrow for [failed bank] Anglo?' some great answers, including: start our own space program with 20 space shuttles; build 6 LHCs or 2 ITER fusion reactors; scrap fares on all public transport for 33 years; buy 2 of Asia's largest banks; buy Steve Jobs himself; detach the People's Republic of Cork by building a ten-metre-wide moat; buy every house and apartment listed on Daft.ie
    (tags: money omgwtfbbq insane argh funny nama anglo sean-fitzpatrick ireland)

Links for 2010-08-12

Links for 2010-08-11

Links for 2010-08-10

Links for 2010-08-05

Links for 2010-08-02

  • Kaprekar's constant : '6174 .. is notable for the following property: Take any four-digit number, using at least two different digits. (Leading zeros are allowed.); Arrange the digits in ascending and then in descending order to get two four-digit numbers, adding leading zeros if necessary; Subtract the smaller number from the bigger number; Go back to step 2. The process will reach 6174 in at most 7 iterations'
    (tags: 6174 constants cool maths mathematics numbers kaprekar wow)

Links for 2010-07-30

Links for 2010-07-26

Links for 2010-07-23

Links for 2010-07-15

Links for 2010-07-14

Links for 2010-07-05

Links for 2010-07-01

Links for 2010-06-29

Links for 2010-06-23

Links for 2010-06-21

Links for 2010-06-17

Links for 2010-06-14

Links for 2010-06-11

Links for 2010-06-10

Links for 2010-06-03

E-mail Address Validating Regular Expressions – a Warning

This page has been floating around in links over the past couple of weeks, as a collection of test cases to compare e-mail address validating regular expressions. However, watch out: it's wrong.

RFC822/2822 defines an email address with a bare IP address domain part as using:

  domain-literal  =       [CFWS] "[" *([FWS] dcontent) [FWS] "]" [CFWS]

In other words, this test case is not valid at all:

  IPInsteadOfDomain@127.0.0.1

Instead, it should be:

  IPInsteadOfDomain@[127.0.0.1]

ditto for the other addrs using IP addresses in the domain part. They're rare, but the non-bracketed form is definitely not legal and should not be considered so in the test cases.

I sent a mail to the author a few days ago without response, hence this post.

Links for 2010-05-31

Links for 2010-05-28

Links for 2010-05-13

Links for 2010-05-11

  • The Totalitarian Buddhist Who Beat Sim City « Viceland Games : interview with the guy behind the "Magnasanti" video. [Godfrey Reggio’s Koyaanisqatsi] 'presented the world in a way I never really looked at before and that captivated me. Moments like these compel me to physically express progressions in my thought, I have just happened to do that through the form of creating these cities in SimCity 3000. I could probably have done something similar - depicting the awesome regimentation and brutality of our society - with a series of paintings on a canvas, or through hideous architectural models. But it wouldn’t be the same as doing it in the game, for the reason that I wanted to magnify the unbelievably sick ambitions of egotistical political dictators, ruling elites and downright insane architects, urban planners and social engineers.' WHOA
    (tags: whoa mental architecture culture gaming society video simcity urban vice)

Links for 2010-05-10

Links for 2010-05-07

Links for 2010-05-06

Links for 2010-05-05

Travel Insurance that works, even with ash clouds about?

Lazyweb request. In a few weeks I'll be taking a flight, along with the wife and kids, for some holidays.

The trip was booked before the whole ash-cloud thing and I used Ace Travel Insurance, a typical low-cost travel insurance agency, winding up with an 'ACE Travel Single Trip Travel HealthCover+ Insurance Policy'.

Looking at the policy doc now, it expressly excludes cover for 'a Public Conveyance being cancelled or curtailed because of adverse weather, industrial action, or mechanical breakdown or derangement' if 'an aircraft, sea vessel or train is withdrawn from service on the orders of the recognised regulatory authority in any country' -- which is exactly what's been happening in Ireland in the face of the Eyjafjallajoekull ash cloud.

That's pretty useless, isn't it? I'm considering booking another additional policy to cover the 'ash case'. Anyone got any tips on single-trip policies that don't use a similar exclusion?

Links for 2010-05-02

Links for 2010-04-30

Links for 2010-04-29

Links for 2010-04-27

  • "Child pornography is great", according to one EU music-business lobbyist : it's the perfect 'gateway' to allow anti-filesharing filtering of the internet. 'Start with child porn, which everybody agrees is revolting, and find some politicians who want to appear like they are doing something. Never mind that the blocking as such is ridiculously easy to circumvent in less than 10 seconds. The purpose at this stage is only to get the politicians and the general public to accept the principle that censorship in the form of ”filters” is okay. Once that principle has been established, it is easy to extend it to other areas, such as illegal file sharing. And once censorship of the Internet has been accepted in principle, they can start looking at ways to make it more technically difficult to circumvent.' Via TJ McIntyre
    (tags: via:tjmcintyre ifpi filesharing child-porn filtering internet johan-schluter anti-piracy-group sweden denmark eu)

Links for 2010-04-26

Links for 2010-04-22

Links for 2010-04-21

Links for 2010-04-20

what Colmcille really said

Mr. Justice Peter Charleton, in the course of his judgement on EMI Records & Ors -v- Eircom Ltd is quoted as having said the following:

' There is fundamental right to copyright in Irish Law. This has existed as part of Irish legal tradition since the time of Saint Colmcille. He is often quoted for his aphorism: le gach bó a buinín agus le gach leabhar a chóip (to each cow its calf and to every book its copy).'

As many have already noted, Colmcille didn't say that at all; his opponent did. If anything, Colmcille invented copyleft.

Manus O’Donnell's account:

Do inneis Finden a sceila art us don righ, ass ed adubhairt ris: “Do scrib C.C. mo leabhur gan fhis damh fen,”ar se, “aderim corub lim fen mac mo leabhur.”

“Aderim-se,” ar C.C., “nach mesde lebhur Findein ar scrib me ass, nach coir na neiche diadha do bi sa lebhur ud do muchadh no a bacudh dim fein no do duine eli a scribhadh no a leghadh no a siludh fan a cinedachaib; fos aderim ma do bi tarba dam-sa ina scribhadh, corb ail lium a chur a tarba do no poiplechaibh, gan dighbail Fhindein no a lebhair do techt ass, cor cedaigthe dam a scribudh.”

Is ansin ruc Diarmaid an breth oirrdearc .i. “le gach boin a boinin” .i. laugh “le gach lebhur a leabrán.”

Or, translated to English by A. O’ Kelleher and G. Schoepperle:

Finnen first told [High King Diarmaid] his story and he said “Colmcille hath copied my book without my knowing,” saith he “and I contend that the son of the book belongs to me.”

“I contend,” saith Colmcille, “that the book of Finnen is none the worse for my copying it, and it is not right that the divine words in that book should perish, or that I or any other should be hindered from writing them or reading them or spreading them among the tribes. And further I declare that it was right for me to copy it, seeing there was profit to me from doing in this wise, and seeing it was my desire to give the profit thereof to all peoples, with no harm therefore to Finnen or his book.”

Then it was that Diarmaid gave the famous judgement: “To every cow her young cow, that is, her calf, and to every book its transcript. And therefore to Finnen belongeth the book thou hast written, O Colmcille.”

Soon thereafter, of course, 3000 died in the Battle of the Book at Cooldrumman, bringing a rather literal meaning to the modern term "copyfight". 'Colmcille and the Battle of the Book: Technology, Law and Access to Knowledge in 6th Century Ireland' is recommended for more background.

Links for 2010-04-16

Links for 2010-04-14

Links for 2010-04-05

Links for 2010-03-31

Links for 2010-03-30

Links for 2010-03-26