NOVELL TECHNICAL INFORMATION DOCUMENT

TITLE:              Patch to Fix Errors Returned by INT 25H, 26H
DOCUMENT ID:        TID000263
DOCUMENT REVISION:  A
DATE:               01JUL93
ALERT STATUS:       Yellow
INFORMATION TYPE:   Symptom Solution
README FOR:         PAT321.EXE

NOVELL PRODUCT and VERSION:
DR DOS 6.0 4/92

ABSTRACT:
This patch fixes a problem where the error codes returned by INT 25h and
INT 26h were incorrect for "drive not ready" and "write protect" errors.
_________________________________________________________________

DISCLAIMER
THE ORIGIN OF THIS INFORMATION MAY BE INTERNAL OR EXTERNAL TO NOVELL. 
NOVELL MAKES EVERY EFFORT WITHIN ITS MEANS TO VERIFY THIS INFORMATION. 
HOWEVER, THE INFORMATION PROVIDED IN THIS DOCUMENT IS FOR YOUR INFORMATION
ONLY.  NOVELL MAKES NO EXPLICIT OR IMPLIED CLAIMS TO THE VALIDITY OF THIS
INFORMATION.
_________________________________________________________________

Self-Extracting File Name:  PAT321.EXE

Files Included     Size     Date        Time

  PAT321.TXT          (This File)
  IBMDOS.321      39239    2-19-92      3:21a


README of PATCH321.EXE


Product:       DR DOS 6.0

Description:   This patch fixes a problem where the error codes returned
form INT 25h and INT 26h for "drive not ready" and "write protect" errors
were incorrect.


ASSUMPTIONS:

1.  The file IBMDOS.321 is in the root directory of your C:\ drive.
2.  TaskMAX is not loaded.


INSTALLATION INSTRUCTIONS:

1.  Remove the attributes from the current working copy of IBMDOS.COM

        From the C prompt:
             Type: ATTRIB -RSH IBMDOS.COM
             Press <ENTER>

2.  Make a backup copy of IBMDOS.COM

             Type: COPY IBMDOS.COM C:\DRDOS\IBMDOS.OLD
             Press <ENTER>

3.  Replace the original IBMDOS.COM with the patched IBMDOS.321


             Type: COPY IBMDOS.321 IBMDOS.COM
             Press <ENTER>

4.  Verify the copied file is the correct size, date and checksum

             Type: CD \
        From the C prompt:
             Type: XDIR IBMDOS.COM /C
             Press <ENTER>

        The following message will display:

--a--- 39,239 2-19-92 3:21a 947B c:ibmdos.com

NOTE: In Archive attribute (a) may be set, however it is not a required
attribute.

5.  Replace the System, Hidden, Read-Only attributes on IBMDOS.COM

             Type: ATTRIB +RSH IBMDOS.COM
             Press <ENTER>

6.  Reboot the computer.
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