Advantech PPC-A84/A120-X5X user manual Audio I/O map range from 220 ~ 250H 16 bytes

3A0-3AF	Bisynchronous 1
3B0-3BF	Monochrome display and printer adapter(LPT1)
3C0-3CF	Reserved
3D0-3DF	Color/graphics monitor adapter
3F0-3F7	Diskette controller
3F8-3FF	Serial port 1
Note:	Audio I/O map range from 220 ~ 250H (16 bytes).

146PPC-A84/A120 User’s Manual