NOVELL TECHNICAL INFORMATION DOCUMENT

TITLE:              Patch for INT 21,4EH Function
DOCUMENT ID:        TID000255
DOCUMENT REVISION:  A
DATE:               01JUL93
ALERT STATUS:       Yellow
INFORMATION TYPE:   Symptom Solution
README FOR:         PAT303.EXE

NOVELL PRODUCT and VERSION:
DR DOS 6.0 4/92

ABSTRACT:
This patch fixes a problem with anINT 21,4Eh call.  The problem is where
the call would only find the Volume label if BIT 3 was set in the
attributes.  The patch forces the system to search bit 3 no matter how it
is set.
_________________________________________________________________

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:  PAT303.EXE

Files Included     Size     Date        Time

  PAT303.TXT          (This File)
  IBMDOS.303      39239   12-03-91      3:03a


README of PATCH303.EXE


Product:       DR DOS 6.0

Description:   This patch makes the INT 21h Function 4Eh (Search First)
compatible with MSDOS when the volume Label attribute is set.  Previously
under DRDOS the volume label was only searched for if bit 3 was the only
bit set in the attribute whereas MSDOS searches for the volume label if bit
3 is set, irrespective of any other bits in the attribute.


ASSUMPTIONS:

1.  The file IBMDOS.303 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.303


             Type: COPY IBMDOS.303 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 12-03-91 3:03a 66B0 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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