Monthly Archives: May 2008

Fiddle to the bittle

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I've added two new routines to the bit-trick page: 1→4 bit-unpack with reverse and bit reversals. This last one is elegant … except for one bit of C tomfoolery that is required to get GCC to produce the right ARM code. I hope to discuss this in more detail later.

I've also added a new document about dealing with bitfields. It explains what to do with them, gives a few useful functions to get and set bitfields, and demonstrates how to use the C construct for bitfields. It also touches briefly on a nasty detail in the way GCC implements bitfield that can cause them to fail in certain GBA/NDS memory sections. If you're using bitfields to map VRAM or OAM, please read.

tonc 1.4 preview

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I'm close to releasing the latest (and probably last; this really has gone on long enough) version of Tonc. As a preview, I'm releasing the PDF a little early in the hope that someone may take a look and offer some feedback before the official release (aw, c'mon, it's only 400 pages).

The changes mostly relate to the new Tonc Text Engine, a text system for all occasions. There's a new chapter describing how TTE works, how to write general character printers for (almost) for arbitrary sized fonts and every type of graphics, and a few other things. It's fairly long and could use sanity checking from someone else.

Also, many of the older demos now use TTE for their text as well. As a result they look cleaner and prettier, but it's possible there are some left-overs from older versions. So have at it.