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From: gwyn@BRL.ARPA (VLD/VMB)
Newsgroups: net.lang.c
Subject: Re:  Casting Question
Message-ID: <1703@brl-tgr.ARPA>
Date: Fri, 17-Jan-86 09:57:41 EST
Article-I.D.: brl-tgr.1703
Posted: Fri Jan 17 09:57:41 1986
Date-Received: Sun, 19-Jan-86 04:25:25 EST
Sender: news@brl-tgr.ARPA
Lines: 9

pc = *((Inst **)(savepc+2));
is not the same as
pc = (Inst *)(savepc+2);
In the former case, you are saying that savepc+2 points at an
(Inst *), which you retrieve and stuff into pc.  In the latter
case, you are setting pc to be equal to the pointer savepc+2.
Not at all the same thing.

Figuring out how this section of hoc works is great C practice.