In addition to the C implementation, there are a few other interfaces that can be built.

Requirements

• c compiler (tested: clang, tcc, gcc)
• make
• standard unix shell


retro-repl

A basic interactive system can be built by using:

make bin/retro-repl

This requires a copy of ngaImage to be in the current directory.

Barebones

This is a minimal version of the retro-repl. It keeps the C portion as short as possible, making it a useful starting point for new interfaces.

To build:

make bin/retro-barebones

retro-compiler

This is a turnkey compiler. It can compile a new executable bundling a Retro VM and image.

Requirements:

• BSD or Linux
• objcopy in $PATH


To build:

make bin/retro-compiler

Example use:

1. Given a source file like "Hello.forth":

~~~ :hello 'hello_world! s:put nl ; ~~~

2. Use:

./bin/retro-compiler Hello.forth hello

The first argument is the source file, the second is the word to run on startup.

3. Run the generated a.out

Limits:

This only supports the core words ('all' interface) and the file i/o words. Support for other I/O extensions will be added in the future.

Pascal

There is a Pascal version of retro-repl.

Dependencies:

• freepascal


Building:

cd vm/nga-pascal fpc listener.lpr

This will require a copy of the ngaImage in the current directory.



This is an implementation of retro-repl in Python. As with retro-repl it requires the ngaImage in the current directory when starting.



This is an implementation of retro-repl in C#. As with retro-repl it requires the ngaImage in the current directory when starting.

Building:

cd vm\nga-csharp csc retro.cs

You'll need to make sure your path has the CSC.EXE in it, or provide a full path to it. Something like this should reveal the path to use:

dir /s %WINDIR%\CSC.EXE

I've only tested building this using Microsoft's .NET tools. It should also build and run under Mono.