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- There is a bug in IBM PC-DOS 3.20 which may cause improper operation of a
- program if a floating point exception is generated. This patch to IBM
- PC-DOS 3.20 is provided to insure proper operation of programs which may
- generate floating point exceptions. In particular, the C runtime routine
- signal with the SIGFPE parameter does not work with the unpatched version
- of IBM PC-DOS 3.20. IBM has also made a patch for this problem available.
-
- Procedure for patching IBM PC-DOS 3.20:
-
- 1. Use the DOS sys command to transfer IBMDOS.COM and IBMBIO.COM
- to a writable diskette.
-
- 2. Copy command.com, sys.com and debug.com from your IBM DOS 3.20
- diskette to the new diskette.
-
- 3. Copy stkpat.bat, stkpat.scr, rmrhs.exe and setrhs.exe from the
- \patch directory to the new diskette.
-
- 4. Reboot the system from the new diskette.
-
- 5. Run stkpat.bat. This patches the IBMBIO.COM on the new diskette.
-
- 6. Use the DOS sys command to transfer the patch to any other
- IBM PC-DOS 3.20 diskette.
-
- If you are running any version of DOS 3.20 other than IBM PC-DOS 3.20, contact
- your hardware manufacturer (OEM) to find out if the problem exists in your
- DOS 3.20 version.
-