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vii
Quick problem solving chart ..........................................................................10-6
Solving hardware and software problems .....................................................10-7
Solving hardware problems ..................................................................10-7
Solving software problems ....................................................................10-13
Solving modem problems .....................................................................10-15
Error codes and messages ............................................................................10-17
IBM Diagnostic Programs ..............................................................................10-20
Recovering factory-installed programs and files ............................................10-22
Part 6. Technical reference
Appendix A. Specification tables ...............................................................A-1
Memory module placement ...........................................................................A-1
Memory map ..................................................................................................A-3
System input/output addresses .....................................................................A-4
System interrupts ...........................................................................................A-6
DMA channel assignments ............................................................................A-7
Serial port addresses .....................................................................................A-8
Connector functions .......................................................................................A-9
Appendix B. Modem information ...............................................................B-1
Modem features .............................................................................................B-1
Operating your modem ..................................................................................B-3
Using the Auto Answer feature .............................................................B-3
Disabling Call Waiting ...........................................................................B-4
Modem commands ........................................................................................B-5
Executing commands ...........................................................................B-5
Command format ..................................................................................B-5
AT commands .......................................................................................B-6
Detail for +MS Controls ........................................................................B-9
Extended AT commands ......................................................................B-10
V.42bis commands ...............................................................................B-11
Modem response codes ................................................................................B-12
S registers .....................................................................................................B-13
Appendix C. Monitor terminology ..............................................................C-1