simon@summer.british-telecom.co.uk (Simon E. Redding) (07/18/89)
Our SUN 3/60 consoles have a nasty habit of scrolling in a jump fashion - i.e. when you get to the bottom, the screen scrolls about 20 lines. This is really annoying when using man. The only way we have found to stop this is a fastboot. Any help? Disclaimer: I'm a hedgehog (ignore me, don't squash me :-) Simon@uk.co.bt.summer
iang@dartvax.dartmouth.edu (Ian Gregory) (07/28/89)
In article <269@brazos.Rice.edu> simon@summer.british-telecom.co.uk (Simon E. Redding) writes: >X-Sun-Spots-Digest: Volume 8, Issue 77, message 6 of 21 > >Our SUN 3/60 consoles have a nasty habit of scrolling in a jump fashion - >i.e. when you get to the bottom, the screen scrolls about 20 lines. This >is really annoying when using man. The only way we have found to stop >this is a fastboot. Any help? Yes, I can help with this, and also with another problem which was posted a little while ago, about getting the console back to black on white when it has been set to white on black. The short answer is to say "LOOK AT MAN CONSOLE(4S)" But to save you the trouble, I will go on to say that these things can be controlled using: ESC[p Black On White (SUNBOW) ESC[q White On Black (SUNWOB) ESC[#r Set scrolling (SUNSCRL) And also: ESC[s Reset terminal emulator (SUNRESET) Takes no parameters. Resets all modes to default, restores current font from PROM. Issuing a SUNRESET sets the console back to the state it is in immediately after booting, but only takes a fraction of a second. This seems to be exactly what you need, and can be done using the command: echo "ESC[s" > /dev/console (hit the escape key, don't type E S C) I hope this helps, Ian Gregory iang@plasmoid.dartmouth.edu
robinson@uncmed.med.unc.edu (Gerard A. Robinson) (07/28/89)
My experiences with this 'jumping' indicate that it happens when I've logged into some other system that by default sets the terminal to vt100, and the initialization sets the scrolling region. One solution I've found is to reset it on the Sun with: echo '^[[1;1r'
guy@uunet.uu.net (Guy Harris) (07/29/89)
>Our SUN 3/60 consoles have a nasty habit of scrolling in a jump fashion - >i.e. when you get to the bottom, the screen scrolls about 20 lines. This >is really annoying when using man. The only way we have found to stop >this is a fastboot. Any help? >From CONSOLE(4S): ESC[#r Set scrolling (SUNSCRL) Takes one parameter, # (default 0). Sets to # an internal register which determines how many lines the screen scrolls up when a line-feed function is per- formed with the cursor on the bottom line. A parameter of 2 or 3 introduces a small amount of ``jump'' when a scroll occurs. A parameter of 34 clears the screen rather than scrolling. The initial setting is 1 on reset. A parameter of zero initiates ``wrap mode'' instead of scrolling. In wrap mode, if a linefeed occurs on the bottom line, the cursor goes to the same character position in the top line of the screen. When any linefeed occurs, the line that the cursor moves to is cleared. This means that no scrolling ever occurs. `ESC [ 1 r' exits back to scroll mode. For more information, see the description of the Line- feed (CTRL-J) control function above. If you get any behavior from the console that you can't seem to fix except by rebooting, check out CONSOLE(4S)'s "SUNxxx" escape sequences - you may have just put the console PROM code into some funny mode with such an escape sequence. (Note that the SUNSCRL escape sequence is has the same final character as the DEC escape sequence to set the scrolling region - Sun consoles are *!NOT!* VT100s, so don't run software on them that thinks they are! The <ESC>[xxxr sequence is in the range of "private" escap sequences specified by X3.64, so while both the VT100 and Sun console claim to be X3.64 conformant, they can still have those sequences do different things. It might have been nice had the Sun console been VT100-compatible, but what's done is done....) The earlier problem with the screen going into white-on-black mode was probably similar - there are escape sequences for that as well.
taft@uunet.uu.net (Mike D. Taft) (08/04/89)
In article <269@brazos.Rice.edu> simon@summer.british-telecom.co.uk (Simon E. Redding) writes: >Our SUN 3/60 consoles have a nasty habit of scrolling in a jump fashion - > >Simon@uk.co.bt.summer What we do on our SUNs is " echo '<ESC>[1r' <ret>" . This usually fixes the problem. Mike Taft -- Sys Admin Honeywell, Inc., Marine Systems Division 6500 Harbour Heights Parkway M/S 4E8 ...uunet!nwnexus!grouch!taft Everett, WA 98204-8899 taft@grouch.hywlmsd.wa.com #include <stddisc.h>
spage@apple.com (08/31/89)
The console tty driver implements some ANSI escape sequences for setting the jump. Read CONS(4S), they're something like <Esc>7r. So, resetting the terminal with `reset` or `echo escape_sequence` should do the trick. =S