maartenj@ark.UUCP (05/14/87)
AUTOMATIC INSTALLATION OF PRINTER FOR DOS PRINT
The following patch is for PC DOS 3.2
DEBUG PRINT.COM
-E 190d<cr>
xxxx:190d E8.90 D6.90 02.90<cr>
-E 191F<cr>
xxxx:191F CD.90 21.00<cr>
-W<cr>
-Q<cr>
If the printer port is LPT2 then the following address must ALSO be
modified as follows:
-E 11c2 4 "LPT2"
MSDOS: MSDOS 3.2 doesn't have PRINTER.COM but PRINTER.EXE
So the best way of finding the right address is searching for
the following bytes using norton or any other program that
allows you to display, change and search a HEX file.
search for 0xE8D602 change these three bytes in 0x909090 and
18 bytes (12 HEX) after that address there should be 0xCD21
change that in 0x9090.
Fist search the whole file for any occurence of E8D602 if there
are more then one look for the CD12 (in assembly INT 21) 18 bytes
after each occurence.
*********************************************************
ALLOW ^W FOR ERASE WORD AND ^U FOR ERASE LINE
For some version of MS/PCDOS this patch will not be necessary. To find
out just try out ^W and ^U if they work don't apply the following patch
(although you might want to change the ^W and ^U to some other keys in
which case you should read on).
**** WARNING ****
The following patch is made to the heart of the system!! Be very
careful. if you think you made a mistake exit before writing the
changes to diskette.
- The safest way of of applying this patch is by formatting a empty
floppy using the command `FORMAT a: /s'.
- Second you have to change the attribute of the system/hidden/read-
only file IBMDOS.COM to `normal'.
You can do this with the PD program CHMOD, norton's FA or any other
program that allows you to change ALL the attribute of a file.
You cannot use the DOS utility ATTRIB.
- Apply the following patch.
- Reset the attributes of IBMDOS.COM to system/hidden/readonly.
- Reboot your pc from the patched floppy in drive a:
- See if the patch worked and if so you can use the SYS command to
port the patched systemfiles to your hard disk or other diskettes.
DO NOT PATCH THE IBMDOS.COM FILE ON YOUR HARD DISK DIRECTLY SINCE DEBUG
WILL NOT WRITE THE FILE BACK TO THE SAME PLACE ON THE HARD DISK.
Some versions of Dos 3.2 have these options disabled for
some reason. To enable them:
Dos 3.2 (PC and MS DOS) :
DEBUG ibmdos.com
-U 1E96
xxxx:1E96 3C17 CMP AL,17
xxxx:1E98 90 NOP
xxxx:1E99 90 NOP
xxxx:1E9A 3C15 CMP AL,15
xxxx:1E9C 90 NOP
xxxx:1E9D 90 NOP
If you don't see something similar don't apply the following patch
-E 1E98
xxxx:1E98 90.74<space> 90.5E<cr>
-E 1E9C
xxxx:1E9C 90.74<space> 90.51<cr>
-W
-Q
If you want the erase line and erase word functions set to something
other then ^U and ^W (I myself prefer ^X and ^W) use the following
patch:
MS/PCDOS 3.2 :
To change the erase word to a other key :
-E 1E97
xxxx:1E97 17.??<cr>
To change the erase line to a other key :
-E 1E9B
xxxx:1E9B 15.??<cr>
Instead of the ?? you fill in the HEXIDECIMAL ascii value of the
key you want it to be. (^A = 01H, ^Z = 1AH, @ = 40H, etc).
****************************************************************************
ECHO OFF
DEBUG COMMAND.COM
PCDOS : -E 1B2C<cr>
xxxx:1B2C 01.00<cr>
-W<cr>
-Q<cr>
MSDOS : -E 1ABC<cr>
xxxx:1ABC 01.00<cr>
-W<cr>
-Q<cr>
The default for AUTOEXEC.BAT files will still be ECHO ON.
to make ECHO of the default (PC & MS DOS 3.2) :
DEBUG COMMAND.COM
-E 115E<cr>
xxxx:115E 03.02<cr>
-W<cr>
-Q<cr>
--
Maarten Jan Huisjes. (maartenj@cs.vu.nl)
{seismo|decvax|philabs}!mcvax!vu44!maartenjmaartenj@ark.UUCP (05/14/87)
In article <1013@ark.cs.vu.nl> maartenj@cs.vu.nl (Huisjes Maarten Jan) writes: > > Fist search the whole file for any occurence of E8D602 if there > are more then one look for the CD12 (in assembly INT 21) 18 bytes > after each occurence. OOPS ^^^^ sould be CD21 -- Maarten Jan Huisjes. (maartenj@cs.vu.nl) {seismo|decvax|philabs}!mcvax!vu44!maartenj
jkg@gitpyr.gatech.EDU (Jim Greenlee) (05/15/87)
In article <1013@ark.cs.vu.nl> maartenj@cs.vu.nl (Huisjes Maarten Jan) writes: > > AUTOMATIC INSTALLATION OF PRINTER FOR DOS PRINT I see this patch periodically and wonder about its usefulness. I have MS-DOS 3.1 running on an AT&T PC 6300 and I can automatically install the printer from my AUTOEXEC.BAT file by including the following line: print/d:prn/q:32 > nul It sets the default device to PRN and the queue size to 32 (the max, I think). Is this feature particular to my version of DOS or is it more widely available? I have never understood the desire by some folks to patch the OS when the feature they want is already available (the recent posting of patches for default ECHO OFF in DOS 3.30 is a good example). I suspect that the user manuals are less than crystal clear on some of the more obscure features (some are probably undocumented), but any respectable user's group (or readers of USENET for that matter) can provide people with the information they want. Why resort to kludgy patches? Jim Greenlee -- The Shadow...!{akgua,allegra,amd,hplabs,ihnp4,seismo,ut-ngp}!gatech!gitpyr!jkg Jryy, abj lbh'ir tbar naq qbar vg! Whfg unq gb xrrc svqqyvat jvgu vg hagvy lbh oebxr vg, qvqa'g lbh?!