Here is the announcement.  I do not really have a functional laptop that has a NeoMagic graphics chip, so I have no idea if the code even works. You probably have to resort to using PuppyLinux, in order to run xf86-video-neomagic since laptops that had NeoMagic graphics chip typically did not support more than 256 MB of main memory.  I do not really have the option of testing the code on a desktop mainboard since I have never seen a stand alone AGP or PCI NeoMagic graphics chip based graphics card.  I am sure it existed back then (i.e., more than 20 years ago) solely for use by laptop PC manufacturers during laptop development. (i.e., reference design card)  This will mean that there probably will never be KMS support for it since you need a minimum of 512 MB for Linux kernel related development nowadays and 1 GB or more is preferred.