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From: theo@rascal.UUCP (T. Kramer)
Newsgroups: comp.terminals,sco.opendesktop
Subject: Alternate character modes on qvt101 and freedom 100 terminals
Keywords: qvt101, freedom100, curses
Message-ID: <1500@rascal.UUCP>
Date: 11 Feb 91 12:30:59 GMT
Reply-To: theo@rascal.UUCP (T. Kramer)
Followup-To: comp.terminals
Organization: Rascal Systems
Lines: 79

I am having the most frustrating time with curses on SCO Open Desktop
developers edition.

When compiling a program that uses curses and switches terminals
such the freedom 100 and qvt101 into alternate character mode (smacs)
all goes well. It is however not possible to switch back into normal mode
(rmacs). This only happens when the character sequence for switching
back to normal mode is '\E%'. The program listed below illustrates
the phenomena. 

When analysing the output of the program below ie. redirecting the output
to a file and using hd to see the characters output, the '\E%' (rmacs)
sequence is missing. If I adjust the sequence for rmacs in the terminfo
source to something else like 'AA' the rmacs sequence is there.

This does not happen on my XENIX V.2.2 development system (fortunatly)
therefore forcing me to create production copies of my software on
the XENIX box.

Does anybody out there know why this is happening, and is there some
way I can fix this in a portable way, ie. it must be general for a wide
range of terminals?

Note: To get the terminal back into non alternate mode after running the
included program type in the following: tput rmacs

+----------------------- Start of code section ----------------------------+
#include <curses.h>
#include <term.h>

#define ULCORNER 'f'
#define LLCORNER 'e'
#define URCORNER 'g'
#define LRCORNER 'h'
#define HLINE 'k'
#define VLINE 'j'

void main()
{
  int index;

  initscr();
  cbreak();
  noecho();

  attron(A_ALTCHARSET);
  move(0,0);
  addch(ULCORNER);
  for (index = 1; index < 20; index++)
    addch(HLINE);
  addch(URCORNER);
  attroff(A_ALTCHARSET); /* puts("\E%"); fflush(stdout); works but is not portable */
  refresh();
  getch();
  endwin();
}

/*
cc qvt.c -oqvt -lcurses
cc qvt.c -oqvt -lcurses


# Terminfo source code for my qvt101 terminal
qp|qvt101+so|Qume qvt101 + terminal,
	cr=^M, cud1=^J, ind=^J, bel=^G,
	is2=\E0P\Ew\E.4\E(\EC\E%\EX\E\047\E+\Ef^M\Eg,
	clear=\E+, tbc=\E3, hts=\E1, sam, cols#80, lines#24, cr=^M, nel=^J,
	xmc#0,khome=^^, kcuf1=^L, kcub1=^H, kcud1=^J, kcuu1=^K, 
	cup=\E=%p1%' '%+%c%p2%' '%+%c, cvvis=\E.1, cnorm=\E.4\E*,
	cbt=\EI, cud1=^J, cuf1=^L, cuu1=^K, home=^^,
	cub1=^H, ul, smso=\E), rmso=\E(, el=\Et, ed=\Ey, il1=\EE,
	dl1=\ER, dch1=\EW, ich1=\EQ, smul=\EG8, rmul=\EG0,rmacs=\E%,smacs=\E$,
	kf1=^A@^M, kf2=^AA^M, kf3=^AB^M, kf4=^AC^M, kf5=^AD^M, kf6=^AE^M,
	kf7=^AF^M, kf8=^AG^M, kf9=^AH^M, kf0=^AI^M,
*/

+------------------------------+---------------------------------------------+
| theo@rascal                  | smacs of something rotten to me             |
+------------------------------+---------------------------------------------+