Support (accelerated) for the IMS Twin Turbo 128 and Twin Turbo 3D is provided by the XF86_SVGA server with the imstt driver.
Support (accelerated) for the IMS Twin Turbo 128 and Twin Turbo 3D is provided by the "imstt" driver.
All hardware supported in 3.3.6 is also supported in 4.2.1.