The CS4281 is a PCI audio controller with integrated legacy games support suitable for desktop and notebook PC designs. When combined with driver software and an AC '97 codec such as the CS4297A, this device provides a complete high quality audio solution. Legacy compatibility is achieved via PC-PCI, DDMA, and CrystalClear Legacy Support. The product includes an integrated FM synthesizer and Plug-and-Play interface. In addition, the CS4281 offers hardware volume control and power management features. WDM drivers provide support for Windows 98 and Windows NT. When used with the CS4297A, the CS4281 is fully compliant with Microsoft's PC '98 and PC `99 audio requirements. In the 100-pin MQFP package, the CS4281 is pin-compatible with the CS4614 and CS4280-CM.