Int 20  P - Microsoft Windows - Vsd - Vxd Services                         [W]

   VxD = 000Bh

Note:  the desired VxD and service number are identified by the data
     immediately following the INT 20 instruction, as in:
       INT 20h
       DW  service number
       DW  VxD identifier

See Also: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#0961,#1032

(Table 0970)
Values for VSD (VxD ID 000Bh) service number:
 00h   get version
 01h   bell
 02h   sound on
 03h   "VSD_TakeSoundPort"

See Also: #0969,#0971