libFAT : hide and fseek …

Well, initially I thought that the performance issue of TCP transfers would be worth another investigation-novel-styled post, but being somewhere between Christmas and New Year's Eve didn't allowed me to do so. Or maybe just digesting the source code of libfat, figuring out what kind of access pattern made it so slow and what more …

Speed Limit: 32

Now, that's fairly annoying. It looks like the TCP WiFi transfers with the "devkitpro r32" is roughly 3 times slowlier than its r21 counterpart (in purple) for the same receiving code. That's especially annoying since it significantly increase the duration of a self-upgrade cycle during development.The new performance (in black, as reported by wireshark) is …

So long, exec.cpp

Since August 2007 the exec.cpp file from GrizzlyAdams has been a corner stone of my activities on the Nintendo DS. It allowed me to launch NDS files from other NDS files -- a functionality that was missing of the "standard" features of libnds by then. Combined with dswifi and a small HTTP retriever, it allowed …

Debugging sessions darker than night

Beyond Infinity, a fellow OS hobby developer back in 2002 used to twist Gandalf's quote into "I see debugging sessions coming, darker than night itself" ... I guess that could apply to the last week. After identifying the reason why DDD wasn't operating properly (not showing machine code) anymore and quickly applying a patch, I …

It works ! I can’t believe it !! …

Wo, dudes. It sure has been an odd week at work, but it was even weirder after office hours when I tried to figure out what prevented Apple Assault to work... I wish I had actually typed "svn copy trunk branch/dkp-r32" before I started "fixing" the code for the new release of devkitarm.After spending hours …

7 of 9 — personal Log

27/11 : quelque soit le code ARM7 que j'utilise (le mien modifié, celui de Tobias ou le code DefaultARm7), runme ne passe pas le cap "sync with 7" sur l'ARM9 ... 28/11 : avec le code ARM7 de Tobias et le code ARM9 de l'exemple httpget.c, je parviens à avoir une transmission WiFi fonctionnelle. C'est …

#undef DSMI

La bonne nouvelle avec le passage au DKP-r32, c'est que du coup, j'ai les bonnes bibliothèques et outils pour compiler le projet NitroTracker d'0xtob ... et donc, que je suis potentiellement un peu plus proche d'un portage de mon support des effets de la libNTXM vers son projet d'origine ... On verra ça ;)Il se …

source setup-r32

Bion, un package sources pour Apple Assault, c'est sympa, mais si le code pouvait être compilé avec les versions en date du devkitpro, ça ne serait pas plus mal, hein ? Il faut dire que j'étais resté à la version r21 qui doit dater d'octobre 2007 et sur laquelle j'ai pas mal bricolé entretemps.I guess …

open-sourcing apple assault …

The engine behind apple assault is open source from the start: this is my (modest) gift back to the world for having provided wonderful open tools such as Firefox, Linux, gcc and devkitpro. The problem so far is that pixel art, on its side, required a lot of work from myself, and I consider it …

sgIP_TCP: either buggy or awkward

L'implémentation de TCP sur DS me surprend un peu, et pourrait bien expliquer les "fuites de données" observées pendant les transfers DS->PC. Ou les "deadlocks" qui se produisent en cours de transmission". Sur la sellette, la gestion des ACK, ces signaux qui indiquent qu'un paquet a bien été reçu.I've never seen a TCP implementation behaving …