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From: gbs@voder.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: How do I patch my PC-DOS 3.1 for control-U and -W support
Message-ID: <2870@voder.UUCP>
Date: Fri, 13-Mar-87 11:46:27 EST
Article-I.D.: voder.2870
Posted: Fri Mar 13 11:46:27 1987
Date-Received: Sat, 14-Mar-87 09:10:57 EST
References: <162@parcvax.Xerox.COM> <418@cognos.UUCP>
Organization: National Semiconductor, Santa Clara
Lines: 28
Summary: Another way to patch ^U and ^W

> ! There has been much mail on the topic of patching various DOS'es to enable
> ! control-U and control-W support.  No one has provided specific instructions
> ! at the byte-location level of detail...
> ! Presumably, I would have to use a disk sector editor...
> ! Phil Burton
> 
> You will need a disk sector editor, or DEBUG utility to make the patch.
> If you're using a disk sector editor, you can search for the following
> HEXADECIMAL text:  3C 17 90 90 3C 15 90 90, then replace it as indicated.
>  
> Brian Campbell

In the above discussion, the use of a sector editor or use of debug
is suggested.  There is another way to get the job done.  I wrote a
small Turbo Pascal program which searches memory starting at location
0000:0000 for the patch area; if it finds it, it enables ^U and ^W
line editing by patching the currently running DOS image rather than
patching the disk.  For convenience, I run the program from my
AUTOEXEC.BAT file so line editing will be enabled after booting.
The program is very short and only takes a second or two to run.

Anyone interested, please reply and I will mail the source to them.
If more than a few people respond, I will post to the net.

-- 
George B. Smith
National Semiconductor
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