Path: utzoo!utgpu!watmath!att!tut.cis.ohio-state.edu!brutus.cs.uiuc.edu!wuarchive!texbell!sugar!ficc!peter From: peter@ficc.uu.net (Peter da Silva) Newsgroups: comp.lang.forth Subject: Re: Implementation dependence Message-ID: <5753@ficc.uu.net> Date: 17 Aug 89 14:47:03 GMT References: <8908161813.AA12808@jade.berkeley.edu> Organization: Xenix Support, FICC Lines: 26 In article <8908161813.AA12808@jade.berkeley.edu>, wmb@SUN.COM (Mitch Bradley) writes: > I would claim that the "Forth Virtual Machine", as implied by FIG Forth > or Forth 79 or Forth 83 or whatever standard you choose, has the following > properties. Forth 79 or Forth 83, yes, but... > * 16-bit stack width > * Byte addressing with no alignment restrictions Fig-forth ran just fine on the PDP-11 and HP1000 with alignment restrictions in place. You just had to use =CELLS on occasion. > * twos-complement arithmetic Maybe. > * ASCII character set > * threaded code -- Peter da Silva, *NIX support guy @ Ferranti International Controls Corporation. Biz: peter@ficc.uu.net, +1 713 274 5180. Fun: peter@sugar.hackercorp.com. `-_-' "Optimization is not some mystical state of grace, it is an intricate act U of human labor which carries real costs and real risks." -- Tom Neff