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