Modsoft (Modicon Software) was the original integrated development environment (IDE) for Modicon PLCs. Released in the late 1980s and popular throughout the 1990s, it ran exclusively under Microsoft Disk Operating System (DOS).
: It generally fails on Windows versions later than Windows 98, including Windows XP and Windows 7, because modern kernels prevent the direct serial port access Modsoft requires for PLC communication. modsoft 2.6 download
DOSBox is a free emulator that recreates a DOS environment within Windows. Install DOSBox from its official website. Mount the Modsoft folder as a virtual drive. Execute MODSOFT.EXE from the command line. 2. Virtual Machines including Windows XP and Windows 7