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Path: utzoo!utgpu!utcsri!flaps
From: flaps@utcsri.UUCP
Newsgroups: comp.sys.ibm.pc,comp.lang.c
Subject: Re: Looking for C functions to access PC memory
Message-ID: <5640@utcsri.UUCP>
Date: Mon, 9-Nov-87 19:17:23 EST
Article-I.D.: utcsri.5640
Posted: Mon Nov  9 19:17:23 1987
Date-Received: Tue, 10-Nov-87 03:06:48 EST
References: <24261F3U@PSUVMB> <447@ucdavis.ucdavis.edu>
Reply-To: flaps@utcsri.UUCP (Alan J Rosenthal)
Organization: University of Toronto
Lines: 16
Keywords: Using pointers in C
Xref: utgpu comp.sys.ibm.pc:8476 comp.lang.c:5062
Summary: 


In article <447@ucdavis.ucdavis.edu> kwok@iris.UUCP (Conrad Kwok) writes:
>	char far *ptr;
>
>	ptr = (char far *) 0xC0000100L;
>	printf("Value at 0xC000:0x0100 is %d\n", *ptr);

bad style.  avoid temporaries; the reader can't determine (easily) for
how long the variable is used.  restricting values to an expression, by
not storing them in variables, is modular in the same way that
restricting values to a function by storing them in local variables is.

use instead:
       printf("contents of C000:0100 is %d\n",*(char far *)0xc0000100L);

ajr