landauer@sun.uucp (Doug Landauer) (05/21/87)
Isn't it fun to program in hex?
I posted a previous version of this article a bit too soon. The patches
in this article work much better than the ones in the previous version,
so if you did get both, get rid of the earlier version. Sorry.
This article contains a patch to CED (see below) to make control-U
be the line-kill character *instead of ESCape*, and to add a new
word-kill character (control-W).
Note: I said *instead of ESCape*. That is, ^U will
erase the line. ESCape will no longer have that
function.
Several people have posted patches to various versions of IBM's PC-DOS
(IBMDOS.COM) to make control-U be the line-kill character, and
control-W be the word-kill character. I've seen others suggesting that
you should use CED instead, or that patching CED is "a better idea".
I've even seen Colin Kelly's wonderful patch (thanks, Colin!) to make
control-U work in CED.
What I haven't yet seen anyone mention is that the IBMDOS.COM patches
*will not work* if you use CED -- they'll be totally ineffective.
So if you want to keep using CED, the IBMDOS.COM patches are useless.
(Also, having a PC-DOS version 3.X that already does the right thing
with these characters is just as useless.)
[
For those of you who've never heard of it, "CED" is a "Command
EDitor" -- it's a program that gives you a kind of command-
history mechanism (more like the Korn shell's than like csh's),
accessible using the arrow keys on the IBM-PC. It is fairly
easy to use, and is or was available on many BBSs -- I believe
that a uuencoded copy of CED version 1.0C was posted here in
net.micro.pc some time last year. (Sorry, I no longer have the
original article.)
]
So, here is an extension of Colin's CED patch that implements a
word-kill character and the line-kill character. You need to start
with CED version 1.0C.
For reference, Colin's articles were
<378@vu-vlsi.UUCP>, dated 12 Oct 86,
and <584@vu-vlsi.UUCP>, dated 26 Jan 87
Sorry, it's not a shar file.
------------------ MKCEDCUW.BAT-----------------------------
goto begin
e 644 15
a 650
jmp e24
e e10 "ced1.0c(c)CJDunford" 0d
a e24
cmp al,17
jz e35
call 751
ret
call 7ae
cmp byte -1[di],20
jz e3b
cmp di,[04cd]
jnz e2c
ret
n cedcuw.com
w
q
This file patches CED 1.0c to use ^U as the line kill character
*instead of ESCape*, and ^W as the (new) word-kill character.
The modified file is written out as CEDCUW.COM. Make sure you
check that it works before copying it over your original CED.COM!
Thanks to Colin Kelley ({cbmvax,pyrnj,psuvax1,bpa}!vu-vlsi!colin)
for finding the right places to put the patch.
-- -- -- -- -- -- -- -- -- -- -- --
Doug Landauer ARPA Internet: landauer@sun.com
UUCP: {amdahl, decwrl, hplabs, seismo, ...}!sun!landauer
:begin
debug ced.com < mkcedcuw.batdsd@hpsadla.UUCP (06/09/87)
Please post it. Donald St. Denis