Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!husc6!uwvax!oddjob!gargoyle!ihnp4!homxb!mtuxo!mtune!codas!killer!usl!usl-pc!jpdres10
From: jpdres10@usl-pc.UUCP (Green Eric Lee)
Newsgroups: comp.sys.amiga
Subject: Ami - MINIX problem for gurus
Message-ID: <374@usl-pc.UUCP>
Date: Fri, 20-Nov-87 16:39:12 EST
Article-I.D.: usl-pc.374
Posted: Fri Nov 20 16:39:12 1987
Date-Received: Mon, 23-Nov-87 05:35:25 EST
References: <8711180347.AA10717@jade.berkeley.edu>
Organization: Univ. of Southwestern La., Lafayette
Lines: 23

In message <8711180347.AA10717@jade.berkeley.edu>, JPARR@UREGINA1.BITNET (John Parr) says:
>Hi all:
>     I ran across a technical difficulty when trying to port MINIX to the
>Amiga.  How the heck can you do a fork?

With difficulty :-).

The best solution that I've thought of for this problem is to make
your compiler generate relative code, that is, all addresses either
PC-relative or relative to stack/frame registers. Then for your fork,
all you have to do is copy to a new place, adjust your registers
accordingly, and presto, you're truckin'. 

That has a couple of flaws. It slows things down, limits your program
to around 64K in size, etc. etc. etc. However, considering that Minix
was designed to run in 64K of program and 64K of data anyhow (albeit
with the more-compact 808x instruction coding), on a 4.7mhz 8088...

--
   Eric Green  elg@usl.CSNET       P.O. Box 92191, Lafayette, LA 70509
   {ihnp4,cbosgd}!killer!elg,      {ut-sally,killer}!usl!elg
"Clothes make the man.  Naked people have little or no influence on
 society."  -- Mark Twain