Path: csiph.com!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Paul Rubin Newsgroups: comp.lang.forth Subject: Re: Forth in VHDL Date: Sun, 31 Jul 2016 17:10:22 -0700 Organization: A noiseless patient Spider Lines: 10 Message-ID: <87d1lt73ip.fsf@jester.gateway.pace.com> References: <0da76832-2d1b-4ff3-911a-69c18bad6610@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: mx02.eternal-september.org; posting-host="588f0882a92c7a33a002b484e1c00683"; logging-data="26778"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19VXNEPCFWwNNUWRuIjgLKH" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Cancel-Lock: sha1:HE6Q34wA4vj04DaccOMqBk/slHk= sha1:qKZsyvfyEJWXBxTgtMPYGVU5FSc= Xref: csiph.com comp.lang.forth:49711 rickman writes: > For a token threaded Forth the primitives use fixed values, the tokens > or in other words, machine commands of the virtual machine. But Forth > defined words are in the dictionary and there would need to be > something to distinguish them, no? Think of the GA144 instruction set: there's a bunch of primitive instructions like arithmetic, and there's also CALL and JUMP instructions that read an address from the instruction stream and adjust the RSP and PC appropriately.