Team Members

• Rene Leikermoser - <rleiker (at) cosy.sbg.ac.at>
• Astrid Stollnberger - <astrid_stoll (at) yahoo.com>
• Marietta Stutz - <mstutz (at) cosy.sbg.ac.at>

VisualSparta is a subset of Pascal/Delphi. Because of the compilers' very spartanic behavior we chose to name it 'Sparta'.

VisualSparta currently supports:

• syntactic check of the read grammar
• simple error handling
• Ifs and WHILEs?
• type checking, which is done on name equivalence
• strings
• arithmetic operations and expressions

Virtual Machine

The VM is written in Java, its input language is based on a modification of the input language used in Wirth's book. The code emitted by the generator consists of

• an integer 0 <= x <= 45 : the opcode

Based on this opcode, the decision which of the following formats to take will be made:

Format 1:

• an integer 0 <= x <= 32 : Register A (destination)
• an integer 0 <= x <= 32 : Register B (operand 1)
• an integer 0 <= x <= 32 : Register C (operand 2)

Format 2:

• an integer 0 <= x <= 32 : Register A (destination)
• an integer 0 <= x <= 32 : Register B (operand 1)
• an integer -2^15 <= x <= 2^15 : Immediate value

Downloads

• EBNF Revisions 1-4 - EBNF Final Revision The EBNF went through several revisions because of severe errors found during programming. Even in the last version an error was found, but the project was too advanced at this moment and the remaining time was too short to fix this.
• Presentation.pdf - Presentation as held in June.
• testfiles.zip - Testfiles and generated code.
• visualsparta.zip - The sourcecode of the compiler.
• visualsparta.exe.zip - Executable only.
• visualmachine.zip - The sourcecode of the virtual machine.
• report.pdf - Facts about VisualSparta and VisualMachine?.

How to start the program

As programming environment we used Borland Delphi Personal 2005, which was included on the DVD of the c't magazine 13/05. A trial version of the 'Architect-Version' can be downloaded here. However, as the Delphi-documentation states, the sourcecode should also be compatible to GNU Pascal or FreePascal, but we did not verify this statement.