Memory map ..................................................................................................A-3
System interrupts ...........................................................................................A-6
Serial port addresses .....................................................................................A-8
Connector functions .......................................................................................A-9
Modem features .............................................................................................B-1
Operating your modem ..................................................................................B-3
Modem commands ........................................................................................B-5
Executing commands ........................................................................... B-5
Command format .................................................................................. B-5
AT commands ....................................................................................... B-6
V.42bis commands ............................................................................... B-11
Modem response codes ................................................................................B-12
S registers .....................................................................................................B-13
ix