Hi, > > On a related note, that FORTH tutorial/compiler is > > > > http://www.annexia.org/forth > > > > It's in two parts, x86 assembler, and FORTH. Both heavily annotated > > with the tutorial. > > I'm afraid Forth passed me by!
Me too! Me and my friends were exposed to it as kids on the http://en.wikipedia.org/wiki/Jupiter_Ace in shops but that foiled the normal 10PRINT "HELLO"; 20GOTO 10 And then it also came along as a ROM for the BBC B from Acornsoft. By then I knew the rough idea, you define words to augment the existing FORTH ones and the interpreter threads execution of them together, but nothing more. So coming across that above tutorial was interesting. I now know the equivalent to the above is : hello begin ." Hello " again ; hello but the Jupter Ace has gone from the shops. Given early BASICs had poor control flow, i.e. IF, GOTO, and GOSUB, I can see with hindsight that FORTH was a lot better choice at the time with all kinds of WHILE-loops, etc, like the endless BEGIN...AGAIN one above. And given most of those were words defined using FORTH you could add your own. It also has [ and ] which let you switch to immediate mode during compilation, IOW the definition of a word could use the result of some FORTH code run at compile time rather than run time, handy if you know it's a compile-time constant. Cheers, Ralph. -- Next meeting: Bournemouth, Wednesday 2010-08-04 20:00 http://dorset.lug.org.uk/ http://www.linkedin.com/groups?gid=2645413 Chat: http://www.mibbit.com/?server=irc.blitzed.org&channel=%23dorset List info: https://mailman.lug.org.uk/mailman/listinfo/dorset
