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BEWARE FILE FOR THE SED SCREEN EDITOR
To report bugs and deficiencies, to ask questions or make
A CHRISTOPHER HALL
Software Engineering - MRO1-2/L10
Digital Equipment Corporation
200 Forest Street
I have tested SED in all the ways I can think of, and it is used
here by a limited but sophisticated group of people (most of the
editor, and all its documentation, was written using SED). Its
reliability should be pretty high, but undoubtedly some features have
not gotten as much exercise as others. So there are probably a couple
of arcane bugs lying around. If you find any please report them, with
as much helpful information as possible.
(SKIP THE FOLLOWING PARAGRAPH IF SED IS NEW TO YOU)
If you have a version of SED earlier than edit level 101 be advised
that the internal command values have changed. The effect is to
Wearrange the keyboard layout, changing only the commands invoked by
^K, ^L, ^N, ^U, AND ^V. If you do not want to make these changes, clear
the assembly parameter "NEWTAB" (ie make it NEWTAB==0) in SED.MAC. The
documentation reflects the new table, so if you want the old
arrangement regenerate the documentation with the "OLDTAB" variable
Do the same for SED.RND and SED.RNO.
SED runs on any processor that runs TOPS-10 or TOPS-20. However, if
you have a KA-10 set the assembly parameter "FTKA10" in SED.MAC
SED currently reads the file to be edited into core and writes it
out on exit. This limits the size of the edit file, the exact
restriction depending on the system's memory and virtual memory.
If you define both the current file and the alternate file to be the
same file, when you do SET-FILEs to toggle back and forth the cursor
may not be where you left it. (no harm is done, though).
If your terminals run at 9600 baud you may have a problem with the
terminal sending XON-XOFF pairs when it feels overworked. SED has a
hard time distinguishing those characters from the ^S and ^Q commands.
The easiest solution is to avoid using ^S and ^Q as commands and set
the NPG flag to tell SED to keep TTY PAGE in effect (read SED.MEM, the
installation guide, if you don't understand this). See the keyboard
layout in SED2.KYS for a suggested arrangement of keys which does not
use ^S and ^Q.