Path: utzoo!attcan!uunet!ncrlnk!ncr-sd!hp-sdd!megatek!spot!hollen
From: hollen@spot.megatek.uucp (Dion Hollenbeck)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Where is the paralell port???
Message-ID: <424@megatek.UUCP>
Date: 13 Dec 88 20:57:27 GMT
References: <10690@s.ms.uky.edu>
Sender: news@megatek.UUCP
Lines: 24

From article <10690@s.ms.uky.edu>, by simon@ms.uky.edu (Simon Gales):
> In article <464@octopus.UUCP> pete@octopus.UUCP (Pete Holzmann) writes:
>>be ignored. LPT1 is at whatever I/O address is stored in the 16 bits at
>>40:8, LPT2 at 40:0a, etc.
>>
>>unsigned far *lpts = 0x00400008L;  /* Define a pointer to the LPT ports */
>>unsigned LPT1Base = lpts[0];
>>
> 
> should be:
> 
> unsigned far *lpts = 0x00000408L;  /* Addr = Segment * 16 + Offset */
> unsigned Lpt1Base  = lpts[0];			
> 
WRONG, WRONG, WRONG.  The original poster was correct.  FAR or HUGE
pointers are stored by MSC and TURBO C as 16bits of segment and
16bits of offset, hence 0x0040:0008 make up the segment:offset
far pointer. 

	Dion Hollenbeck             (619) 455-5590 x2814
	Megatek Corporation, 9645 Scranton Road, San Diego, CA  92121

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