Cybiko Bytecode Interpreter

Assembler

The bytecode assembler - vas utility, understands the following options:

-i display version information (logo),

-d disassemble its own output to stdout (check output integrity),

-h display help (usage info, currently quite terse, to say the least),

-o outfile name output file (stdout by default).

-O Optimize output assembler code

-v Verbose mode – statistic messages about module to be compiled will be generated

If no options are given, vas tries to read stdin and to write to stdout, don’t optimize output code and don’t write statistic messages. Preferable extension for the output file is .bin, which stands for binary. While parsing input:

• empty lines are ignored,
• semicolon (;) is considered a comment character - the semicolon itself and everything up to the end of line is treated as a comment and is ignored,
• if first non-blank character on the line is period (.) that line is considered to be an assembler directive,
• otherwise, the line must contain a valid instruction code.
• only one instruction name may be placed in one string.