Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!rutgers!mephisto!mcnc!duke!dukempd!fang
From: fang@dukempd.phy.duke.edu (Fang Zhong)
Newsgroups: comp.sys.ibm.pc
Subject: POKE, PEEK, FAR POINTER
Keywords: ON a AT with Microsoft C
Message-ID: <848@dukempd.phy.duke.edu>
Date: 14 Feb 90 06:15:27 GMT
Organization: Duke University Physics Dept.; Durham, N.C.
Lines: 24


	I am relatively new to PC-AT and MS C.  I am asking helps from the net.
	We bought a frequency-timer-counter board for our AT.  We need to
write to and read from several registers.  Currently, I am using POKE and
PEEK functions from a GPIB board package.  For a given address with segment
and offset, how do I use far pointer to write to and read from the address?
	Will the far pointer macro be faster than POKE and PEEK?

	Here is something I have tried and it did not work.

	unsigned far *addr;
	unsigned seg, offset, byte;

	addr = NULL;
	addr += seg*16 + offset;
	*addr = byte;
	printf("%u\n"), *addr);

	Any helps are appreciated very much.

-- 
	Fang Zhong				1-919-684-8247
	Duke University Dept. of Physics	fang@phy.duke.edu
	Durham, N.C.      27706