If you have a login to Emerson’s support site (formerly GE IP), search for "LM90" or "IC641SWM900". Some version 9.05 files are still archived.
Logicmaster 90 relies entirely on keyboard function keys ( F1 through F10 ) for navigation, rendering mouse controls completely non-functional. The environment is split into two primary operational modules:
Logicmaster 90 is the original DOS-based software package used to program, configure, and communicate with GE Fanuc 90-30 and 90-70 PLCs. While it is a mature product that is no longer officially supported by GE Automation, it remains necessary for legacy systems that are not fully compatible with modern environments like Proficy Machine Edition Finding the Software (Download & ZIP)