From: michael_davidson@pacbell.net (Michael Davidson)
Subject: [TUHS] b remnants?
Date: Sat, 15 Oct 2011 01:54:59 -0700 (PDT) [thread overview]
Message-ID: <1318668899.92444.YahooMailClassic@web82407.mail.mud.yahoo.com> (raw)
In-Reply-To: <CAFCBnZtX8s+s5gXJG+3N7bhjd7iQ42Lrwt-7mKv=1AsUDsXPng@mail.gmail.com>
--- On Fri, 10/14/11, A. P. Garcia <a.phillip.garcia at gmail.com> wrote:
What intrigued me about this is that it's such an early example of an
abstract machine running as an interpreter. BCPL, roughly
contemporaneous, used ocode as an intermediate language, but it seems
this was intended to be further translated into assembly. While it's
possible to interpret ocode, in practice it seems this was rare, if it
was done at all.
Not sure if anyone ever interpreted ocode - by the time I encountered BCPL in the mid 1970's the "porting kit" consisted of the BCPL compiler along with an ocode to intcode translator, a reference intcode interpreter written in BCPL and of course, the intcode for the compiler. To bootstrap on a new machine you implemented an intcode interpreter - probably in assembler and, initially, ran the intcode version of the compiler until you had implemented an ocode to machine code translator for your system.
All of this is described in the Richards / Whitby-Strevens book.
Michael Davidson
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next prev parent reply other threads:[~2011-10-15 8:54 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-14 14:52 A. P. Garcia
2011-10-14 15:34 ` Derrik Walker
2011-10-14 15:53 ` Gregg Levine
2011-10-14 16:35 ` Derrik Walker
2011-10-14 19:17 ` Jeremy C. Reed
2011-10-14 20:08 ` John Cowan
2011-10-14 18:06 ` Tim Newsham
2011-10-15 3:57 ` A. P. Garcia
2011-10-15 4:57 ` Andru Luvisi
2011-10-15 8:54 ` Michael Davidson [this message]
2011-10-15 14:12 ` Gregg Levine
2011-11-01 16:24 ` Tim Bradshaw
2011-10-15 6:20 ` Greg 'groggy' Lehey
2011-10-14 18:23 Jason Stevens
2011-10-15 4:20 Jason Stevens
2011-10-15 4:37 ` Gregg Levine
2011-10-15 8:44 ` Michael Davidson
2011-10-15 16:14 Jason Stevens
2011-10-15 16:41 ` Gregg Levine
2011-10-17 16:18 ` Al Kossow
2011-10-17 16:29 ` Gregg C Levine
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