OSDev.org

hello,

could anybody give me some pointers on writing a VGA driver? i know things about VGA and allocating pixels, but am confused on writing a driver

Well you could look at existing interfaces and then build a driver to cover the requested functionality:

Common 2D graphics api
Once universally present, now a deprecated interface. <- DONT CLICK *NIX FANBOYS

Not sure how advanced your VGA knowledge is, but these might be useful as well:
VGA Resources
VGA Hardware
Some VGA sample code