When you run an MS-DOS-based program that plays one or more beep sounds through your computer's PC speaker, you may not hear any sound from the PC speaker.
This issue can occur because Windows 98 redirects beeps from MS-DOS-based programs to your computer's sound card. If your sound card is not working properly, its volume or output level is set too low, or your default sound is set to None, you will be unable to hear any beeps.
To resolve this issue, use the appropriate method:
If your sound card or speaker volume or output level is set too low, increase it until you can hear the appropriate sounds from your MS-DOS-based program.
Your Default Sound Is Set to None
Configure your default sound to use the Ding.wav file:
Click Start, point to Settings, click Control Panel, and then double-click Sounds.
Under Events, click Default sound, click ding.wav in the Name box, and then click OK.
To work around this issue, disable the "Fast ROM emulation" feature of your MS-DOS-based program:
Right-click the appropriate MS-DOS-based program file or the shortcut to the MS-DOS-based program, and then click Properties.
Click the Screen tab, click to clear the Fast ROM emulation check box, and then click OK.
This procedure configures Windows 98 to use the 16-bit video ROM BIOS for handling system console access, and to use the 16-bit video ROM BIOS to play the beep sound through your PC speaker. An MS-DOS-based program can make a beep sound by sending a beep character through the system console, which is normally handled by the video ROM BIOS, a 16-bit component. By default, Windows 98 intercepts access to the system console and handles the requests in its 32-bit video driver. This handling of calls intended for the video ROM BIOS is known as "ROM emulation". When a beep sound is sent to the system console, Windows 98 uses ROM emulation to convert it into the beep sound set listed in the Sound tool in Control Panel.