IsForth

I recently had the opportunity to try out IsForth, a direct threaded Linux-only x86 Forth implementation that was quite impressive. One of the standout features of this software is that it was coded in pure assembly using NASM macros to create high-level definitions.

Another great thing about IsForth is that all I/O is done with syscalls, which allows for more efficient and streamlined processes overall. In fact, IsForth can almost serve as a complete replacement for both libc and libncurses, making it a versatile tool for developers who need robust software for their projects.

One of the most useful features of IsForth is the built-in debugger. To activate it, all you need to do is say "debug xyzzy" and you'll be able to step through your code with ease. The debugger includes several helpful features such as single steps with the space key, entering into nested words with Enter, and exiting the debugger with Escape.

You can also move the cursor within the current definition using the Cursor key, and use H to auto step to the current location. If you're auto stepping and want to adjust your step speed, simply use the + and - keys. Overall, I highly recommend IsForth for anyone in need of a reliable and efficient development tool for their projects.