IBM Systems Magazine, Mainframe - January/February 2015 - (Page 40)

STOP RUN Model Mainframer A Lego version of the zEnterprise 114 is transformed into a working 'mainframe' model W hat started as an update to a cardboard model of the zEnterprise* BC10 (zBC10) became a working Lego model of a mini "mainframe." Martin Trübner sits with his Lego model "mainframe" and smartphone, which helps run the model. PHOTO COURTESY OF MARTIN TRÜBNER Valerie Dennis is managing editor of IBM Systems Magazine, Mainframe edition. In 2012, Martin Trübner posted on Facebook his attempts to update the front panel of his zBC10 model to look like a zEnterprise EC12. An IBMer in Germany saw this and sent the independent mainframe consultant, also from Germany, a Lego model of the zEnterprise 114. Trübner assembled the gift quickly. But even after the model was constructed, he had a nagging feeling that there was more to be done. "I measured the inner dimensions and started a hunt for a heart of the model," he says. A software consultant, Trübner also works with hardware in his free time. With two days' worth of effort spread over a month, he built a functioning Lego model of the mainframe. The Lego Mainframe in Action See a video of the Lego model mainframe: View slides on how it came together: 40 // JANUARY/FEBRUARY 2015 The running model is small in size, but building it was a big task. Trübner started with a Raspberry Pi motherboard. It comes with an ARM-CPU and has-among other connectors that weren't used-a 26-pin connector to control other equipment and two USB slots. He chose a Debian OS because he's familiar with it. Once downloaded and installed on the Micro SD card, the Raspberry Pi expands to a little less than 2 GB when first started. By removing the GUI, it required less than 1 GB, leaving space for the System/370 emulator and DOS- the predecessor to z/VSE*-on four simulated 3340 disks on a 2 GB Micro SD card. He next built working lights on the front "with power consumption low enough to not need an extra power supply," he explains, by using red and green LED lights controlled by the OS. After that, he worked on developing something that could control an IBM 3270 Model 2, chosen because "everyone with a smartphone working close to a System z* box has an emulator for 3270 Model 2" on the device," he says. Although the model works- with a startup time of almost six minutes-it doesn't do much. "Besides the limits of the old version of DOS, it is limited by the capabilities of the emulator," Trübner notes. When consulting, Trübner shares the model "mainframe" with his audience at the end of daylong presentations. He says the audience's first reaction is amazement.

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - January/February 2015

Table of Contents
Editor's Desk: A new mainframe
IBM Perspective: Embracing mobile with z13
Partner PoV: Align existing competencies with intuitive best practices
Focus on Storage: IBM System Storage DS8870 delivers workload efficiency as the amount of information increases
Currents: Small changes in recent z/OS releases can result in big improvements
Case Study: A Sky-High Education: Marist College uses the cloud to offer massive open online courses
Cover Story: Game Changer: New z13 is optimized for mainframe clients' mobile, analytics and cloud needs
HotTECH Products
Feature: A Clustered Support System: IBM delivers the flexibility and data availability of Elastic Storage to Linux on System z
Tech Corner: Using the data availability function makes sense for some environments
Solutions: Accelerator for.NET 5.0; TASKLIB+ and Launch Express; Express Entry Global Address Verification
Stop Run: A Lego version of the zEnterprise 114 is transformed into a working 'mainframe' model
Reference Point - Global Events, Education, Resources for Mainframe
2015 Mainframe Solutions Edition Product Index

IBM Systems Magazine, Mainframe - January/February 2015