PORTIBM PC Portable (uses same BIOS as XT) 0220-0223 - Sound Blaster / Adlib port (Stereo)
SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 0388h-0389h

0220  R-  Left speaker -- Status port
0220  -W  Left speaker -- Address port
0221  -W  Left speaker -- Data port
0222  R-  Right speaker -- Status port
0222  -W  Right speaker -- Address port
0223  -W  Right speaker -- Data port