Oldblivion is a piece of software which allows graphics cards which are pre DirectX9 to run Elder Scrolls: Oblivion from Bethesda. This means that Oblivion can run on cards such as Geforce 3, Geforce 4, Radeon 9200 and so on. Oldblivion is still in an early development phase but it's fairly stable, however there still are a few bugs and kinks to work out.

Oldblivion attaches to Oblivion and applies certain non-permanent patches to it. This means that once you exit the game these patches will vanish as they are only done in RAM. Some of these patches are for making sure that Oblivion doesn't crash when run on hardware which lacks certain new functionality. It also changes the shaders used by Oblivion from pixel shader 2.0 and vertex shader 2.0 into pixel shader 1.1 and vertex shader 1.1.

oldblivion
Original Author: asp

Custom shaders
Original Author: atomizer
Additional Authors: asp, Excors, CrazyDog

Spell fix
Original Author: tommionu