Int 03  - Dtown Utilities - Pop Up                                         [U]

Program: DTown Software Development's DTown Utilities contains various tools
     which are useful to programmers, such as a memory viewer and
     disassembler

Note:  DTU pops up on INT 03 (if not hooked by a debugger) to allow the
     user to inspect memory or code when the machine crashes; various
     memory managers will invoke INT 03 when displaying a CPU exception
     error message (either automatically or when the user presses a
     particular key)

See Also: INT 2D/AL=20h"DTown"