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PAT303.TXT
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1993-09-17
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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.