![]() ![]() Even with this JDK, source code written for Java 4 or Java 5 can't be compiled to Java 1.1 binary class files, so the parameter -source 1.3 must be specified explicitly. Support for Java 1.1 was dropped in the Java Development Kit 1.6 so I got Java SE 5 (JDK) from. This version requires working with Java 1.1. As the most recent version seems to be the best option to try, I first attempted to get leJOS RCX 3.0 RC2 working but that version turns out to require the USB IR Tower so I switched to leJOS 2.1.0. I choose leJOS because I know the Java programming language. Then I looked for working alternatives to the Lego SDK. The original software (available here: ) was documented to be designed for Windows(c) 95/98 and doesn't run on my 64-bit Windows 10 computer. Some infrared signals for the RCX are documented here: and here: Original software However on there are instructions using the driver from, which was updated as recent as may 2020.Įxtensive documentation of technical details of the RCX hardware is still available: Infrared The USB IR Tower has been reported not to work on 64-bit systems (because there was no driver). I got the Serial IR Tower working using a LogiLink A. It contains an RCX 1.0 without a power jack, two touch sensors, a light sensor, two 9v motors and a serial IR Transmitter Tower. Recently I got my hands on a Lego Robotics Invention System 1.5 from 1999. Many resources are available on github: Hardware This has been done and has been documented a few years ago: Running the leJOS VM on a Lego Mindstorms RCX in 2020 takes some effort. ![]()
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