SoundMAX Integrated Digital HD Audio (WinXP.32-Bit)
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ftp://ftp.hp.com/pub/softpaq/sp39001-39500/sp39428.exe
http://www.hilljan.com/software/HP540%20Basic%20Driver/sp39428.exe

HDAUDIO\FUNC_01&VEN_11D4&DEV_1981&SUBSYS_103C30AC
HDAUDIO\FUNC_01&VEN_11D4&DEV_1981&SUBSYS_103C30AD
HDAUDIO\FUNC_01&VEN_11D4&DEV_1981&SUBSYS_103C3021
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