Taken straight from the dt-688 driver cd, drivers for all windows OS (at least 98-XP) should be in here. Don't download the other xp driver, evidently from the comments it seems to contain a virus.
|Diamond Multimedia monstersound mx300 3Ad (Windows XP Professional) 2 replies||Oct 2, 2012|
|Diamond Multimedia MX400 (Windows XP Professional) [IDE] 1 reply||Aug 9, 2008|
|Diamond Multimedia Diamond Monster Sound MX100 (Windows XP Professional) [PCI / ISA]||Jul 28, 2008|
|Diamond Multimedia MX300 (Windows Vista) [PCI / ISA]||Mar 18, 2008|
|Diamond Multimedia xtreme sound 7.1/24 bit (Windows Vista) [PCI / ISA] 1 reply||Apr 19, 2007|
|Diamond Multimedia Monster Sound MX100 (Windows 98SE) [PCI / ISA] 1 reply||Jul 31, 2006|