In the history of industrial automation, few names carry the quiet weight of Modsoft. Developed by Modicon (later part of Schneider Electric) in the 1980s and 1990s, Modsoft was a DOS-based programming environment for programmable logic controllers (PLCs)—the rugged computers that run factory assembly lines, water treatment plants, and power grids. Version 2.6, a late iteration of that lineage, represents both a technical artifact and a challenge to modern software preservation.
: Open your DOS emulator or virtual machine. modsoft 2.6 download