Welcome to the web site of JLC Enterprises Inc!

Here you can find product and ordering information for the Bruce Chubb designed Computer/Model Railroad Interface (C/MRI) System . Since first introduced in a 16-part series in Model Railroader magazine the system has gone through numerous technological updates. Today, it is the most renowned system for interfacing a computer to a model railroad. Its full spectrum of applications includes simplified signaling for the smallest of layouts up to supporting the largest imaginable railroad empire. Over 3000 systems have been installed on layouts around the world.

Additionally, tens-of-thousands of the optimized occupancy detectors have been employed including the DCCOD for DCC layouts and the OD for DC layouts. Each has applications separate from, or as an integral part of, the C/MRI system. Both the DCCOD and the OD offer exceptional performance that outshines all of the competition.

Update Summary!

If you have visited the JLC Web site previously, you are likely to soon observe that the site has been extensively expanded to include:

A New Beginners Corner focuses on the simplicity of the C/MRI and how a single circuit board, called a Super Mini-Node Interface (SMINI), is all that’s required to interface a model railroad to a computer. To fit most everyone's budget, the SMINI can be purchased fully assembled and tested, as a complete kit or for the Do-It Yourselfer as a bare board with separately purchased electronic parts. Click Here for more information.

Announcement of several new cards including a Prototypical Grade Crossing Controller (PGCC) card. Also new RSSD and RSST cards provide added alternatives when interfacing to 3-lead searchlight signal LEDs. Additionally, the SSD card is re-introduced for driving 2-lead searchlight signal LEDs when not using the Super Mini Node Interface (SMINI) card. Click Here for more information

New general information write-ups are included covering The Computer Advantage to Signaling and Optimized Occupancy Detection. Click Here for more information

New downloadable packages are provided that cover "how to" information for most all the JLC circuit boards that are not already covered in the V3.0 C/MRI User's Manual. These include the DCCOD, OD, ODMB, RSSD, RSST, SSD and SMC12 cards. Additionally, the previously available downloadable package covering the SMINI and the RS485 card is retained for those that have not yet acquired a copy of the C/MRI User's Manual. Click Here to download information on each of these cards.

New extensive cost analysis data is provided making it easier to decide whether to go with the bare-board Do-It' Yourself approach from JLC Enterprises where you purchase your own electronic parts, or to go with the complete kit or assembled & tested approach via EASEE Interfaces and SLIQ Electronics. Click Here for more information

Up-to-date parts lists are included for all of the most popular JLC provided circuit boards. Additionally, tabular data is provided to aid in determining price versus quantity information when purchasing your own electronic parts. Click Here to download whichever parts lists you desire.

Example application software is provided to include the complete program listing for the signaling example published in the March 2004 issue of Model Railroader along with a separate documentation file explaining the program. Click Here for more information

Serial Protocol Subroutines are provided as separate downloadable files containing the Standard Packages in both QuickBASIC and Visual Basic. Click Here to download your copies.

Graphics Demonstration Program is provided in Visual Basic which adds dynamic graphics to the March 2004 Model Railroader example. These permits using "mouse clicks" to align turnouts and change block occupancy and then observe the resulting change in signal status. Although directly connectable to a model railroad via the C/MRI, this example demonstrates how graphics can be used in a test or simulation mode without the railroad even being connected. Click Here for more information

Graphics Demonstration Executable is provided, in addition to the standard project files noted above, so that the March 2004 Model Railroader example can be operated by those that do not have Visual Basic installed on their computer. This makes it possible for those not yet having the C/MRI or having any application software to "operate" the "virtual railroad example." Click Here to run the example.

Update on Railroader's Application Handbook is provided regarding the not yet released multi-volume V3.0 Railroader's C/MRI Application Handbook. This project began over 4 years ago as a simple update to the V2.2 Handbook that encompassed 470 pages. That would in itself be a rather time consuming job. However, to the benefit of most everyone, and after nearly 5 years in the making, the result is going to be an essentially all new documentation package involving three separate volumes with 35 chapters and over 1000 pages. Click Here for more information

Much of the update material now being posted on this Web site was taken directly from the material coming out in the new Handbook. Therefore, reviewing this Web site you are already getting a preview into many of the highlights to be released with the forthcoming V3.0 Railroader's Application Handbook.

Readily available C/MRI User's Manual continues to remain in stock and readily available for near immediate shipment. Even after the new V3.0 Railroader's Applications Handbook becomes available, the V3.0 C/MRI User's Manual will continue to be starting point for C/MRI applications.

With 560 pages covering the "how to" information for all of the general purpose C/MRI circuit boards, along with numerous introductory applications, its content is pertinent to every C/MRI application. Additionally, a software disk is enclosed with the manual that includes copies of the standard serial protocol subroutines, automated system test software and abundant application examples. Click Here for more information on the currently-available, and must have, V3.0 C/MRI User's Manual.

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