Re: PCODE Interpereters 101

Dwight Hughes <>
23 Jan 1999 17:31:39 -0500

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From: Dwight Hughes <>
Newsgroups: comp.compilers
Date: 23 Jan 1999 17:31:39 -0500
Organization: Internet Partners of America
References: 99-01-079
Keywords: interpreter

This might be somewhat afield from what you're looking for, but I have
put the Implementation section from "Smalltalk-80: The Language and
Its Implementation" (the "Blue Book" to Smalltalkers) online at my
site (no figures - I'll be adding them over the next couple of days):

This defines the original Smalltalk-80 Virtual Machine for the
original Smalltalk-80 Virtual Image - which means it's a 16bit
implementation (1981 vintage), not 32bit like "modern" Smalltalks ,
and is defined as a pure bytecode "interpreter" (most modern
commercial Smalltalks have used what later got called JIT translation,
and made a big deal of, for over 10 years).

At least this should give you another perspective.

-- Dwight

Carl Dawson wrote:
> I am after a background as to how PCODE interpreters function. Could
> someone help here or kindly point me in the direction of some
> (preferably web based) information.

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