I'm not sure if it's working cause I don't have this video card. But someone was looking for it so I uploaded it. Hope it's useful.
The following files are found inside the driver download file.
|SIS215C.DRV||124.4 KB||15 Dec 1997|
|SISMINI.VXD||16.8 KB||5 Nov 1997|
|DDSIS.DLL||10.2 KB||15 Dec 1997|
|SIS215C.INF||1.9 KB||8 Jan 1998|
|SISSHEET.HLP||8.7 KB||29 Apr 1997|
|DDSIS32.DLL||58.4 KB||15 Dec 1997|
|SISSH215.DLL||110.1 KB||5 Nov 1997|