INT 21 - FARTBELL.EXE - INSTALLATION CHECK
AX = 4000h
BX = 0002h
CX = 0000h
DS:DX = 0000h:0000h
Return: CF clear if installed
AX = CS of resident code
Note:   FARTBELL is a joke program by Guenther Thiele which makes various
noises when programs output a bell

See also: 214001

214000BX0002 - FARTBELL.EXE - INSTALLATION CHECK