http://codewaves.com/gba/tutor_vol1.php
* 32-bit RISC CPU ARM7TDMI
* 16.78 MHz processing frequency
* System ROM 16Kbytes
* Working RAM 32KB + 256KB
* Video RAM 96KB
* Game Pack Memory up to 32MB
* 240 x 160 screen resolution, up to 32768 colors
* Hardware video effects (rotation, blending, mosaic)
* 6 control keys and Direction Pad
* 4 + 2 sound channels
* Serial communication
"Most advanced component of GameBoy Advance is video system. It is very optimized for 2d graphics game engines and have almost all hardware-accelerated function required for such games: sprites, 6 video modes, rotation/scaling, alpha blending, fade-in/out, mosaic. Unfortunately this video system doesn't support any 3d acceleration functions."
Dan East