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From: bamford@ihuxy.UUCP (Bamford)
Newsgroups: net.micro.att
Subject: Re: 7300 shift print escape sequence
Message-ID: <1427@ihuxy.UUCP>
Date: Fri, 13-Jun-86 14:17:56 EDT
Article-I.D.: ihuxy.1427
Posted: Fri Jun 13 14:17:56 1986
Date-Received: Tue, 17-Jun-86 19:05:07 EDT
References: <886@hounx.UUCP> <495@hropus.UUCP>
Distribution: net.unix
Organization: AT&T Bell Laboratories
Lines: 19

> If you are trying to dump the screen of a terminal connected to the
> phone or rs232 port, I think you are out of luck, as UNIX has no idea
> what's on it, at least at the kernel level.  As you probably know, the
> console screen is memory mapped, so when you press the shift-print
> key, it wakes up a system daemon that reads this section of memory
> and formats it for an epson and sends this data to the lp spooler for
> printing.  Now if it were Berkeley.... :-)

There is an ioctl() call to get an array filled with the screen's image.
There is, however, no indication of the layout of that array so dumping
it to a printer is a lost cause.  If somebody can explain this layout,
then screen dumps can be done from a program...
-- 

				Harold Bamford
				AT&T Bell Labs
				(cornet) 8-367-5744
				Naperville, Ill
				(312) 979-5744