INT 2F - Forte/Gravis ULTRAMID - INSTALLATION CHECK
AX = CD00h
BX = 464Fh ('FO')
CX = 5254h ('RT')
DX = 4520h ('E ')
Return: AL = FFh if installed
BX = 4155h ('AU')
CX = 4449h ('DI')
DX = 4F20h ('O ')
ES:SI -> program ID string
Program: ULTRAMID is a MIDI driver for the Gravis UltraSound which allows use
of AIL drivers with other software
Range: AH=CDh-ECh, selected by scanning for an available multiplex number
SeeAlso: INT 21/AX=FD12h,AX=CD00h/DX=4957h