Int 01  - CPU-generated (80386+) - Debugging Exceptions                    [C]

Desc:  generated by the CPU on various occurrences which may be of interest
     to a debugger program

Note:  events which may trigger the interrupt:
     Instruction address breakpoint fault - will return to execute inst
     Data address breakpoint trap - will return to following instruction
     General detect fault, debug registers in use
     Task-switch breakpoint trap
     undocumented 386/486 opcode F1h - will return to following instruc

See Also: INT 03