Path: utzoo!utgpu!attcan!uunet!tektronix!pogo!curtj
From: curtj@pogo.GPID.TEK.COM (Curt )
Newsgroups: comp.unix.xenix
Subject: XENIX.. speed up of /dev/port ..  (Getting the INODE)
Keywords: inode xenix port
Message-ID: <6552@pogo.GPID.TEK.COM>
Date: 6 Jan 89 00:00:36 GMT
Organization: Tektronix Inc., Beaverton, Or.
Lines: 33


I thank you for the suggestion of  (mknod /dev/port 4 3) to create a 
device which I can talk to the I/O ports.. 

My current problem is this:

	I have 1.2 Meg, to send down through an I/O port.  Since
	I have to to an 'lseek' every time I wish to send a byte down 
	to a specific port address, it takes an astronomical amount of
	time to send the data.

	Is there any way to cause READ/WRITE to NOT update the file 
	pointer address when you execute them.  If not, HOW DO I GET
	HOLD OF THE i-node so that I can reset the file pointer	to the
	proper address every time I issue a READ/WRITE.

	I am trying to cut down the system call overhead.

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