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From: braner@batcomputer.tn.cornell.edu (Moshe Braner)
Newsgroups: comp.sys.apollo
Subject: vt100 -- alternatives?
Summary: need a better terminal emulator
Message-ID: <8254@batcomputer.tn.cornell.edu>
Date: 24 Jun 89 12:23:51 GMT
Reply-To: braner@tcgould.tn.cornell.edu (Moshe Braner)
Organization: Cornell Theory Center, Cornell University, Ithaca NY
Lines: 63

[]

I am having problems with the vt100 emulator supplied by Apollo.
It came without sources (why?!) so I cannot fix it.  Is there an
alternative program, PD perhaps?  All I really need is a way to
control the TEXT in a window: cursor addressing, erase to EOL,
erase to EOS -- via escape sequences of chars output to the window.
(I would also need a way to invoke the alternative instead of the
Apollo vt100 automatically when a program (e.g., vi) uses TERMCAP.)

The Apollo "vt100" thingy insists on changing the font to its own
choosing, and hangs mysteriously at times during a "vt100 rlogin".

- Moshe Braner

Cornell Theory Center, 265 Olin Hall,
Cornell University, Ithaca, NY 14853	USA
(607) 255-9401
<braner@tcgould.tn.cornell.edu>		(INTERNET)
<braner@crnlthry>			(BITNET)

PS: here is a little program that, when run on a remote machine
accessed via "vt100 rlogin" from my Apollo 3500 (1280_bw), causes
the window to hang after it exits:


#include	<stdio.h>
#include	<sgtty.h>

struct  sgttyb  ostate;
struct	sgttyb	nstate;

ttopen()
{
	ioctl(1,TIOCFLUSH,0);
	sleep(1);
	gtty(1, &ostate);
	gtty(1, &nstate);
	nstate.sg_flags |= RAW;
	nstate.sg_flags &= ~(ECHO|CRMOD);
	stty(1, &nstate);
}

ttclose()
{
	fflush(stdout);
	sleep(1);
	stty(1, &ostate);
}

main ()
{
	int c;

	ttopen();
	fputs ("hit any key: ", stdout);
	c = fgetc(stdin);
	fputc (0x1B, stdout);		/* movecursor (24, 1) */
	fputs ("[24;1H", stdout);
	fputc ('\n', stdout);		/* scroll */
	ttclose();
	exit(0);
}