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Path: utzoo!decvax!ucbvax!laser-lovers
From: laser-lovers@ucbvax.UUCP
Newsgroups: mod.computers.laser-printers
Subject: Re: Programming LN03 question.
Message-ID: <8512151839.AA07557@topaz.rutgers.edu>
Date: Sun, 15-Dec-85 13:39:12 EST
Article-I.D.: topaz.8512151839.AA07557
Posted: Sun Dec 15 13:39:12 1985
Date-Received: Mon, 16-Dec-85 23:11:33 EST
References: <8512121657.AA13245@ucbvax.berkeley.edu>
Sender: spp@ucbvax.BERKELEY.EDU
Reply-To: grr@unirot.UUCP (George Robbins)
Organization: The Soup Kitchen, Piscataway NJ
Lines: 143
Keywords: LN03 filter
Approved: laser-lovers@washington.arpa
Summary: Simple LN03 Filter

In article <8512121657.AA13245@ucbvax.berkeley.edu> MRL%PFCVAX@MIT-ZERMATT.ARPA writes:
>I'm looking for some help in programming an LN03.  I've been trying to use the
>fonts that come with the machine in the opposite direction from what the
>default is, i.e. specifying LANDSCAPE rather than PORTRAIT.
>							Mark London


I have this feeling that the extra memory module is exactly what you need.  We
have several LN03's at Commodore used mostly for word processing and in place
of a line printer on our unix system.  I have no complaints about the LN03's butthe preliminary manual they were shipped with has to set a new low for utility.
It gives all the details, but tells you nothing.  I guess they assume that you
just read a LN03 concepts and features manual or something.

Anyway, I am not sure how to do what you want, however I would like to offer
this little filter that I wrote.  It allows you to select one of the two ?nn
fonts that seem to be intended as default fonts for portrait or landscape mode
printer emulation.  If anyone knows how to make the printer power up with these
modes I would really like to hear about it.

The program acts a standard unix filter, meaning it can be used to print a file
directly on the printer, or piped in between pr and lpr.  It processes the
command line sequentially.  When it sees a -P or -L switch, it sends a control
string to switch to portrait or landscape mode respectivly.  When it sees a
file name, it copies the file to stdout.  If no file names were specified, it
copies stdin to stdout, and finally sends the string to reset the printer to
default power-up format.

I had originally intended to implement lots of switches to allow specifying all
the various printer parameters, but found that the -P and -L choices did all
that I needed, so I quit while I was ahead.  Use of getopt would probably make
the program much simpler, but I was blissfully unaware of that flamewar when I
wrote this.

--------------------------------------------------------------------------------

/*
 *	ln03	A simple filter to make a DEC LN03 into usable printer...
 *
 *	ln03 -P file...			Portrait Mode
 *	ln03 -L file...			Landscape Mode
 *	ln03	file...			Why Bother
 *
 *	No Rights reserved, this program is cast upon thee winds of fate since
 *	it took longer to figure out the LN03 manual than to write the program.
 *
 *	George Robbins 9/85 - ihnp4!cbm!grr
 *
 */

#include <stdio.h>

int	didfile;

main(argc,argv)
	int	argc;
	char	*argv[];
{
	int	argn;

	didfile = 0;
	for (argn = 1; argn < argc; )
		argn = doarg(argc, argv, argn);
	if (didfile == 0)
		dostdin();
	printf("\033[!p");
	fflush(stdout);
}

int
doarg(argc, argv, argn)
	int	argc;
	char	*argv[];
	int	argn;
{
	char	*argp;
	char	argl;

	argp = argv[argn++];
	if (*argp++ != '-') {
		dofile(--argp);
		didfile++;
	} else
		while(argl = *argp++)
			argn = doswitch(argc, argv, argn, argl);
	return(argn);
}

int
doswitch(argc, argv, argn, argl)
	int	argc;
	char	*argv;
	int	argn;
	char	argl;
{
	int	targ;

	switch(argl) {
	case 'L':
		printf("\033[?21 J\010\033[15m\033[5;255s");
		break;
	case 'P':
		printf("\033[?20 J\010\033[12m\033[13;255s");
		break;
	case 'l':
	case 'p':
	default:
		fprintf(stderr,"invalid switch -%c\n",argl);
	}
	return(argn);
}

int
dofile(argp)
	char	*argp;
{
	FILE	*input;
	int	c;

	if (input = fopen(argp, "r")) {
		while ((c = fgetc(input)) != EOF)
			putchar(c);
		fclose(input);
	} else
		fprintf(stderr,"can't open %s\n",argp);
}

dostdin()
{
	int	c;
	while ((c = getchar()) != EOF)
		putchar(c);
}


-- 
George Robbins			uucp:	{unirot|tapa}!grr
P.O. Box 177
Lincoln U, PA  19352	[Any ideas herein are not responsible for themselves!]
---
George Robbins			uucp:	{unirot|tapa}!grr
P.O. Box 177
Lincoln U, PA  19352	[Any ideas herein are not responsible for themselves!]