IntSpy

IntSpy is an MS-DOS program able to monitor interrupts generated by another program. It can be specified which interrupts are monitored. If an interrupt occurs, depending on the register contents, a message is written to the console or to a file.

It is possible to selectively monitor all attempts to access files, or to monitor all attempts to access a network, or to monitor all MS-DOS calls made by a program. It is also possible to print all MS-DOS calls, as C subroutine calls.

IntSpy is a 16-bit MS-DOS program, used to debug 16-bit MS-DOS programs. It does not work and has no use in 64-bit Windows versions. Today it is only useful for people operating and debugging legacy systems.

Download IntSpy, including the source code.

Previously IntSpy has been shareware. Now it is free software.