Date:  January 26, 1987 
Number:  172 

Title: Patch for DOS 3.2 XCOPY to run on NetWare. 

 
 The XCOPY.EXE file available with DOS 3.2 sometimes fails to 
copy network files and prints garbage characters on the screen. 
The patch process described below will fix the problem.  If you 
make a mistake, simply start the proceedure again. 
 
1. Copy XCOPY.EXE onto a diskette and rename it to XCOPY.NEW. 
 
2. Place your DOS utility diskette containing DEBUG.COM in drive 
A and the diskette containing the XCOPY.NEW file in drive B, type 
the following command line, and press the Enter key: 
 
A:DEBUG B:XCOPY.NEW 
 
3. The DEBUG prompt "-" will appear. 
 
4. Now, enable the DEBUG assembler at address "1C41" by typing "A 
1C41" at the DEBUG prompt in the following way: 
 
-A 1C41 
 
5. After the above command is entered by pressing the Enter key, 
the following segment and offset address will appear (xxxx 
represents the segment and will differ depending on the machine 
in use): 
 
xxxx:1C41 
 
6. Now, on the same line, type the first assembly instruction "JB 
1C45" so that the line looks like the following: 
 
xxxx:1C41 JB 1C45 
 
7. Press the Enter key and the next segment and offset address 
"1C43" will appear like the following: 
 
xxxx:1C43 
 
8. You will need to type 10 more assembly language instructions 
(11 total).  Type the instructions as they appear in the 
following list and press the Enter key after each instruction. 
The first instruction has already been entered.  Assembly 
Language Instruction List 
 
xxxx:1C41 JB 1C45 
xxxx:1C43 JMP 1C99 
xxxx:1C45 CALL 1C9A 
xxxx:1C48 JB 1C7B 
xxxx:1C4A PUSH ES 
xxxx:1C4B PUSH DS 
xxxx:1C4C PUSH DX 
xxxx:1C4D MOV AH,2F 
xxxx:1C4F INT 21 
xxxx:1C51 ES: 
xxxx:1C52 MOV DS, [01AE] 
 
(In the above section "[01AE]", the "0" is a zero.) 
 
9. When the "xxxx:1C56" segment and offset appear, type the Enter 
key and the Debug "-" prompt will appear again. 
 
10. Now, enable Debug's editing feature at the offset "1F1B" in 
the following way: 
 
-E 1F1B 
 
11. Press the Enter key and the following segment, offset, and 
byte value will appear. 
 
xxxx:1F1B 6A. 
 
12. The value "6A" must be replaced with the value "06" by typing 
"06" on the same line and pressing the SPACE BAR to enter the 
value. 
 
xxxx:1F1B 6A.06 
 
13. The next value "0D" will appear on the same line. 
 
xxxx:1F1B 6A.06 0D. 
 
14. The value "0D" must now be replaced with "00" by typing "00" 
on the same line. 
 
xxxx:1F1B 6A.06 0D.00 
 
15. Press the Enter key to return to the Debug prompt "-". 
 
16. Type "W" and press the Enter key to copy the new byte values 
and intructions to the XCOPY.NEW file.  The following message 
will appear: 
 
WRITING 2BC0 BYTES 
 
18. Now, type "Q" to exit DEBUG and then press the Enter key. 
 
19. The patch is now complete.  The patched file XCOPY.NEW must 
now be renamed to XCOPY.EXE.