114 lines
4.3 KiB
Plaintext
114 lines
4.3 KiB
Plaintext
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AST RESEARCH TECHNICAL BULLETIN TB-0214A 09/19/86
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PATCH TO ACCESS THE LEARN MENU ON TANDY 1000
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While the Tandy 1000 appears to be a very IBM compatible machine
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in most respects, it appears that there is a difference with
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respect to the keyboard such that users cannot bring up the
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DESQview Learn menu on the Tandy 1000. This feature is accessed
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by holding down the shift key and then tapping the Alt key. This
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problem does not seem to occur on the Tandy 1200.
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Tandy 1000 users who want to be able to access the Learn menu
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should be able to do so by installing the following patch. It
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redefines the activating key sequence to Control-Alt. Users who
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are experiencing similar problems on other compatibles may find
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this will work for them also.
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To create the patched DESQview file, you will need a copy of the
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DOS utility DEBUG.COM. This can be found on your DOS
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Supplemental directory.
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The patch:
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1. Copy your DV.EXE file to a backup file. In case the patch
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doesn't work, you can restore the original and you will be no
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worse off.
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C:\dv>COPY DV.EXE DVBACK.EXE
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2. Rename your DV.EXE to DV.XXX so that it may be patched. This
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is necessary so that DEBUG will load the file properly.
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C:\dv>REN DV.EXE DV.XXX
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3. Enter DEBUG using the DV.XX parameter.
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C:\dv>DEBUG DV.XXX
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Debug will load the program and present you with a hyphen as
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a prompt. To this prompt, type an "R" and hit the Enter key.
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You will be presented with a display similar to the one shown
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below. It is not necessary that you understand this (aren't
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you glad?).
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-R
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AX=0000 BX=0001 CX=BBAO DX=0000 SP=FFEE BP=0000 SI=0000 DI=0000
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DS=???? ES=1F87 SS=1F87 CS=1F87 IP=0100 NV UP DI PL NZ NA PO NC
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1F87:0100 4D DEC BP
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4. In the space following the "DS=" in your display, which in
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the example above contains "????", you will see four alpha-
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numeric characters. Take note of these characters and to the
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hyphen prompt, type "H" followed by a space, when the number
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following the "DS=", then another space and "1000" as
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illustrated below. Follow this by hitting the Enter key and
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you will see two sets of characters shown below as "XXXX" and
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"YYYY". Only the "XXXX" will be used for the patch.
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-H ???? 1000
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XXXX YYYY
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5. Now to the hyphen prompt type "S", the four characters shown
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in "XXXX" above and ":0 FFF0 F6 06 17 00 03" as shown below
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and hit the Enter key.
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-SXXXX:0 FFF0 F6 06 17 00 03
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????:????
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6. Debug should return two sets of four characters each
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separated by a colon. This is shown above as "????:????".
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If DEBUG returns to the hyphen prompt without returning this
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set of characters, this patch will not work on your copy of
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DESQview and you should type "Q" and hit Enter to quit DEBUG.
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If it did return the characters, continue:
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To the hyphen prompt, type "E" followed by the characters
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shown above as "????:????" Then hit the Enter key. DEBUG
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will respond with a line ending with "F6" and an underline
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cursor. Press the space bar and a "06" will appear as shown
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below. Keep pressing the space bar until "03" appears with
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an underline prompt following it. To this prompt, type "04"
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and then hit the Enter key.
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-E????:????
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????:???? F6. 06. 17.
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????:???? 00. 03.04
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7. Debug will return to the hyphen prompt. To this prompt, type
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"W" and hit the Enter key. Your disk will light up and Debug
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will indicate that it is writing a given number of bytes that
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may or may not match the example below.
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-W
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Writing 1BBA0 bytes
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8. At this point, the patch is complete and the file has been
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written to disk. Return to DOS by typing "Q" and hitting
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return.
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-Q
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C:\DV>REN DV.XXX DV.EXE
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9. Finally, rename DV.XXX to DV.EXE (shown above) and then
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enter DESQview. If your patch has been successful, you
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should now be able to access the Learn menu by holding down
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the Control key and tapping the Alt.
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If the patch does not work, delete DV.EXE and try again using
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the DVBACK.EXE file.
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