LC-2200 Assembler/Emulator

The F2011 ECE 445 class studies a fictitious processor architecture called the LC-2200 designed for instructional use by Ramachandran & Leahy.

It uses a 32 bit instruction width, data width, and register width, and has a 4 bit opcode allowing for 16 instructions. While the authors specify only 8 instructions, a further 6 (or 7) have been added for use at George Mason. This means that the assembler provided by the authors will not work on code used in the ECE 445 course.

Rather than attempting to modify the existing C assembler I found it faster to implement an assembler from scratch in Java. Using an Object Oriented approach made it easy to expand on the original functionality and add an emulator with relative ease. The emulator has been expanded and now has support for macros and preprocessor directives (to pre-load memory and registers, for instance).

A zip with the latest version is available for download below. The zip includes the executable jar, usage hints, API notes, and a few sample programs.

I have not spent a lot of time testing and there are probably a lot of bugs. I can't fix them if I don't know about them! Drop me a note at my GMU address (hint to humans: username is in address bar).

Downloads:

• 23 SEP 2011 - lcasm_v03.zip - Initial Release
• 29 SEP 2011 - lcasm_v03a.zip - Includes a few macros and some emulator preprocessor directives.

Copyright (C) 2011 by Jacob Dilles

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