The C/MRI system was created by Dr. Bruce Chubb in 1985, and introduced to the model railroad community through a 16-part series of articles in Model Railroader magazine. A C/MRI update article was published by MR in 1992. Applications flourished with the C/MRI-based Chubb authored books, “BUILD YOUR OWN UNIVERSAL COMPUTER INTERFACE” first published by TAB Books and then later expanded greatly and published by McGraw-Hill 1989-1997. Significant C/MRI enhancements were introduced in the 4-part series “SIGNALING MADE EASIER” published in Model Railroader beginning with their January 2004 issue.
Additional publications, in the form of comprehensive C/MRI User’s Manuals and Railroader’s C/MRI Application Handbooks, continue to advance the protocol with an ever-broadening base of C/MRI users. In 2014 the C/MRInet Protocol was adapted as a Group Standard by the NMRA and listed in their standard’s section as Layout Control Specification LCS-9.10.1.
The latest current publication involving the C/MRI is an extensive series of articles covering Railroad Signaling launched in the December 2015 issue of Railroad Model Craftsman. It may well prove to be the greatest in-depth thesis ever published on prototypical signaling and how to adapt it to model railroading via the C/MRI.
In summary, with periodic updates and an ever expanding user base over the past three decades, the C/MRI has become more applicable today than the day it was invented. Multi-thousands of layout control projects using the C/MRI protocol have been implemented. These systems use a variety of Host computers, programming languages and employ a variety of 30 operating systems. JLC Enterprises, Inc. is the ORIGINAL C/MRI and still going strong!
Books and unassembled components for C/MRI System
JLC Enterprises Inc.
PO Box 88187
Grand Rapids, MI 49518 USA
Source for complete kits and fully assembled & tested C/MRI components
SLIQ Electronics LLC
P.O. Box 8283
Kentwood, MI 49518 USA
JLC recommended parts supplier for fabricating a CTC machine
Control Train Components
4068 Olmstead Street
Waterford, MI 48329 USA
JLC recommended sources for electronic parts
1355 Shoreway Rd.
Belmont, CA 94002 USA
P.O. Box 677
Thief River Falls, MN 56701 USA
1224 S. Bascom Ave.
San Jose, CA 95128 USA
11433 Woodside Ave.
Santee, CA 92071 USA