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QEMM.P22
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1991-05-27
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18KB
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568 lines
;This patch command is based on the Quarterdeck Technical Notes given below.
;These Technical Notes were found in the files REALLOC.PAT and FUNC24.PAT
;
; QEMM386.sys is the name starting from version 5.10
;
qemm386.sys *1?\h7506010E?\hEB06010E?
qemm386.sys *1?\h8BCB0BDA74F0?\h8BCB0BDA7422?
;
; QEMM.sys is the name until version 5.0
;
qemm.sys *1?\h7507010E?\hEB07010E?
qemm.sys *1?\h8BCB0BDA74F0?\h8BCB0BDA7422?
;
;
;Here follow the instructions from Quarterdeck, which have been
;translated into the PATCH22 commands above
;
;============================================================================
;
; Quarterdeck Technical Note (From the file: REALLOC.PAT)
;
; Subject: Patching QEMM-386 5.00, 5.10, 5.11, and
; 5.12 to resolve problems with programs that resize
; EMS or XMS handles
;
; Background: Starting with QEMM-386 5.00, QEMM-386
; supports both the EMS (Expanded Memory
; Specification), which governs access to expanded
; memory, and the more recent XMS (Extended Memory
; Specification), which governs access to extended
; memory. Requests for EMS and for XMS memory are
; both filled from the same pool of QEMM-managed
; memory, and EMS and XMS handles (numbers that the
; memory manager returns to a program when the
; program takes a chunk of memory, so that the
; program can quickly identify the chunk when it next
; communicates with the memory manager) are managed
; together by QEMM-386.
;
; Both EMS and XMS contain a call that programs can
; make to reallocate blocks of memory; that is, to
; take a handle that the program has already received
; and increase or decrease the chunk of memory to
; which the handle refers. Users of QEMM-386
; versions 5.00 through 5.12 may experience system
; instability under certain circumstances when a
; program makes an EMS or XMS call to increase the
; size of a handle. The symptom is likely to be a
; system crash or a reboot.
;
; Users of versions of QEMM-386 after version 5.12
; should not experience this problem. In the
; meantime, QEMM-386 can be patched to eliminate the
; problem.
;
;
; The following procedure is intended to prevent
; system crashes and reboots when Reallocate Memory
; EMS and XMS functions are used to increase the size
; of EMS and XMS handles. This procedure is for use
; with QEMM-386 versions:
;
; 5.10
; 5.11
; 5.12
;
; ***************************************************
;
; Do NOT use this patch for QEMM-386 5.0; a
; separate procedure for QEMM-386 5.0 is later in
; this technote. If you are in doubt, go to the
; directory where the QEMM-386 files are located and
; check the date on the QEMM386.SYS file by issuing
; the DOS command:
;
; DIR QEMM386.SYS
;
; If the date on the file is
;
; 5:10 am
; 5:11 am
; 5:12 am
;
; then use the patch in this section. If there is no
; QEMM386.SYS file in this directory, then you
; probably have an earlier version of QEMM-386; go
; forward to the section that deals with the patch
; for QEMM-386 5.0.
;
; ***************************************************
;
; 1) Make a copy of the QEMM386.SYS file in your
; QEMM directory. We are about to alter your current
; copy of QEMM386.SYS; the copy you make will serve
; as a backup in case this operation fails.
;
; COPY C:\QEMM\QEMM386.SYS C:\QEMM\QEMM386.OLD
;
; (If your QEMM386.SYS is not located in the QEMM
; directory of the C: drive, change the path
; accordingly.)
;
; 2) Go to the DOS directory on the hard disk and
; type:
;
; DEBUG C:\QEMM\QEMM386.SYS
;
; (If your QEMM386.SYS is not located in the QEMM
; directory of the C: drive, change the path
; accordingly.)
;
; Hit the Enter key; you should see the DEBUG
; prompt, which is a hyphen.
;
; 3) At the DEBUG prompt, type:
;
; S 100 L F000 75 6 1 0E
;
; Hit the Enter key; DEBUG should return a segment
; address and an offset:
;
; xxxx:yyyy
;
; 4) At the DEBUG prompt again, use the segment
; address and offset that was just returned to give
; the DEBUG command:
;
; E xxxx:yyyy EB
;
; The address that DEBUG returned in step 3 should
; be used in place of the address xxxx:yyyy, which we
; use as an example. Hit the Enter key; the DEBUG
; prompt should return in a moment.
;
;
; 5) At the DEBUG prompt, type
;
; W
;
; Hit the Enter key; DEBUG will announce that it is
; writing a certain number of bytes, then it will
; return the DEBUG prompt.
;
; 6) At the DEBUG prompt, type
;
; Q
;
; Hit the Enter key to exit DEBUG and return to
; DOS.
;
; 7) To double-check your patch, type the following
; from the DOS prompt in your DOS directory:
;
; COMP C:\QEMM\QEMM386.SYS C:\QEMM\QEMM386.OLD
;
; (If your QEMM386.SYS is not located in the QEMM
; directory of the C: drive, change the path
; accordingly.)
;
; Hit the Enter key. COMP should return:
;
;
; C:QEMM386.SYS and C:QEMM386.OLD
;
; Compare error at OFFSET xxxx
; File 1 = EB
;
; File 2 = 75
;
; Eof mark not found
;
; Compare more files (Y/N)?
;
; The value xxxx after OFFSET will vary from
; version to version of QEMM 5.1, but the rest of the
; message should be the same: it tells us that
; there is exactly one byte difference between the
; files, and the differing byte is EB in QEMM386.SYS
; and 75 in QEMM386.OLD. If COMP returns the
; message:
;
; Files compare ok
;
; ...then you probably failed to use DEBUG's W
; command to save your change, or you have compared
; the wrong files. If COMP returns more than one
; compare error, or if the bytes returned by the
; compare error don't match those in the above
; example, the procedure has failed. In this case,
; use the DOS command:
;
; COPY C:\QEMM\QEMM386.OLD C:\QEMM\QEMM386.SYS
;
; ... to restore the original file, and try again.
;
; If the patch was successful, you should now reboot
; the system and test the patched version of QEMM-
; 386. If the patched version of QEMM-386 fails, see
; the section at the end of the technote on restoring
; your original copy. Otherwise, you are finished
; with the patch.
;
;
; ---------------------------------------------------
;
;
; The following procedure is intended to prevent
; system crashes and reboots when Reallocate Memory
; EMS and XMS functions are used to increase the size
; of EMS and XMS handles with QEMM 5.00.
;
;
; ***********************************************
;
; This patch is for:
;
; QEMM-386 5.00
;
; A separate procedure for other versions appears
; earlier in this technote. If you are in doubt, go
; to the directory where the QEMM-386 files are
; located and check the date on the QEMM.SYS file by
; issuing the DOS command:
;
; DIR QEMM.SYS
;
; If the date on the file is
;
; 5:00 am
;
; then this patch is the one to use. If there is no
; QEMM.SYS file in this directory, then you probably
; have a later version of QEMM-386; go back to the
; section that deals with the patch for QEMM-386 5.1.
;
; ***************************************************
;
; 1) Make a copy of the QEMM.SYS file in your QEMM
; directory. We are about to alter your current copy
; of QEMM.SYS; the copy you make will serve as a
; backup in case this operation fails.
;
; COPY C:\QEMM\QEMM.SYS C:\QEMM\QEMM.OLD
;
; (If your QEMM.SYS is not located in the QEMM
; directory of the C: drive, change the path
; accordingly.)
;
; 2) Go to the DOS directory on the hard disk and
; type:
;
; DEBUG C:\QEMM\QEMM.SYS
;
; (If your QEMM.SYS is not located in the