Int 10 Fn 1DAA  U - Diamond Stealth64 Video - Installation Check           [V]

   AX = 1DAAh
   BX = FDECh

Return: BX = CDEFh if Diamond Stealth64 Video 2001-series video card installed
       AL = number of megabytes of video memory
       AH = ??? (4Bh/5Bh)
       CX = ??? (0000h)
       SI:DI -> signature/copyright string