Even within the standard, I have a hard time remembering which way round ROT goes. It seems like every time I need to use it, I either look it up or I do "1 2 3 ROT .S DROP 2DROP" to figure it out.

I suggest this mnemonic: `rot` is the "normal", so it's "clockwise"; `-rot` is the opposite.

Seems to me that it would be useful to have a stack manipulator word for every permutation of stack diagram, and these should have universally accepted names.


I don't think it would be practical, even feasible. There are many different stack operations you can do, and most of them can be defined ...

It's called also nup. It seems there's no accepted name yet. Some Forthers dislike those too specific stack manipulations, except the standard nip and tuck; others find them useful.

I don't program the 6502, but the Z80. I joined because Forth is my favorite language and I've seen there are interesting discussions here.

I quote myself to make it clearer, just in case: I know the forum is 6502-specific. I have no intention to post about Forth on Z80. There are other forums ...

Thanks Marcos. I updated the links in my earlier post.

Great. When I realized the links you recommended were broken I got intrigued, because I like reading any kind of Forth tutorials and introductions, so I searched web.archive.org for the latest copies. I liked that old site by Brad Eckert. It ...

Thanks. I don't program the 6502, but the Z80. I joined because Forth is my favorite language and I've seen there are interesting discussions here.

and there is also an F83 standard.


This clarification may be useful: Sometimes "F83" is used as an informal abbreviation of "Forth-83", but they are two different things:


Forth-83 Standard .
F83, a popular Forth-83 Standard Forth system, written by Michael Perry and Henry Laxen, with ...

I'll direct you to a couple of good ones, http://www.tinyboot.com/about4th.html and http://www.tinyboot.com/bforth.htm , before attempting to answer it myself below..

That website disappeared some years ago, but the most recent copies of those pages on archive.org are the following:


A brief ...