Path: utzoo!attcan!uunet!samsung!usc!apple!dlyons
From: dlyons@Apple.COM (David A. Lyons)
Newsgroups: comp.sys.apple2
Subject: 80-col firmware and Ctrl-Q, ESC Ctrl-Q, Ctrl-U
Message-ID: <43257@apple.Apple.COM>
Date: 23 Jul 90 00:37:32 GMT
References: <3219.apple.net2@pro-grouch>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 42

Just to clarify this after all the discussion of turning the 80-column
firmware on and putting it in 40-column mode:

 --> There are *differences* between what you type at the *keyboard*
     to activate and deactivate 80-column firmware, and to switch
     between 80 and 40 columns while the 80-col firmware is on.

From the keyboard:

     PR#3 enables the 80-col firmware
     On a IIc Plus and a GS (and a IIc??), ESC then 8 also does it

     With the 80-col firmware *on*, ESC then 4 switches to 40-col
     *leaving* the 80-col fimrware active (cursor is solid), and
     ESC then 8 switches back to 80-col.

     Typing ESC then Ctrl-Q turns *off* the 80-col firmware, leaving
     you in 40-columns with a blinking checkerboard cursor. 

In the "output stream" (PRINTed from a program):

     Ctrl-D "PR#3" enables the 80-col firmware the next time a
     character is printed (not right away!...try printing the
     PR#3 and doing a VTAB or HTAB or something and then doing
     a print...the screen initializes & HOMEs in 80-col before
     that character gets printed).

     Ctrl-Q switches to 40-columns, and Ctrl-R switches to 80
     columns.  The 80-col firmware stays active.

     To disable the firmware (return to 40-col and checkerboard
     cursor), print a Ctrl-U.

(I hope that helps rather than confuses. :)
-- 
David A. Lyons, Apple Computer, Inc.      |   DAL Systems
Apple II Developer Technical Support      |   P.O. Box 875
America Online: Dave Lyons                |   Cupertino, CA 95015-0875
GEnie: D.LYONS2 or DAVE.LYONS         CompuServe: 72177,3233
Internet/BITNET:  dlyons@apple.com    UUCP:  ...!ames!apple!dlyons
   
My opinions are my own, not Apple's.