Notes on Specific Implementations

Assembly This is for 32-bit x86 Linux systems. If you have problems with the input (e.g., under PuTTY), try: cat - | ./retro retroImage

C The C implementation can be built to support use of 16-bit, 32-bit, or 64-bit images. The default is to build for standard 32-bit images. To build for 16-bit, define RX16, and for 64-bit, define RX64. To actually get a 16-bit or 64-bit image, do: make tools ./convert

Forth The Forth VM is more of a virtualizer than an actual virtual machine. It maps the image to the host memory, and uses the standard Forth data stack and some native functions. As such it needs to be used with an image that matches your Forth's cell size. There is no support for getEnv due to lack of a standard function to access this in ANS Forth. You can build 16-bit and 64-bit images using the convert tool.

Lua The Lua implementation requires Lua JIT or Lua 5.2. Earlier releases of Lua lack the bitwise operators. Note that a single line needs to be altered in the source to enable use under Lua 5.2.