[Àû¿ë´ë»ó: DOSBox-x]

If set, force port 22Ch (DSP write buffer status) to return 0x7F or 0xFF.

If not set, the port may return 0x7F or 0xFF depending on what type of Sound Blaster is being emulated.

Set this option for some early DOS demos that make that assumption about port 22Ch.

Option is needed for:
Overload by Hysteria (1992) - Audio will crackle/saturate (8-bit overflow) except when sbtype=sb16
