106 lines
4.3 KiB
Plaintext
106 lines
4.3 KiB
Plaintext
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AST RESEARCH, INC. TECHNICAL BULLETIN #0573A 04-19-90
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=============================================================================
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5251/12 AND SYSTEM 34 SESSION PARAMETERS
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With Version 4.22 and below of AST-5251/12 emulation software, some System/34
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session parameters may be deleted after running a procedure. When signing on
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to a subsequent session with the same workstation ID, the following
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parameters will have been deleted (zeroed):
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LIBRARY
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SYSLIST DEVICE
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FORMS
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LINES PER PAGE
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The KERNEL.EXE program can be patched to ensure that this does not happen.
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The patch outlined in this document uses NORTON UTILITIES, but can be
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modified to fit other debugging programs.
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To alter KERNEL.EXE using NORTON UTILITIES do the following:
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1. Enter the NORTON UTILITIES program. From the "Main Menu" choose
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EXPLORE DISK. From "Menu 1" choose the appropriate item.
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2. From "Menu 1.1" change directory or drive designation as necessary to
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make sure that KERNEL.EXE (found on disk 1 of the emulation software)
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is available to the program. Next, choose the FILE option "Menu
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1.1.3" and highlight KERNEL.EXE.
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3. Return to "Menu 1" and take the SEARCH option, then from "Menu 1.4"
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choose TEXT TO SEARCH. The next screen has two fields. Tab to the
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HEX field and enter the hex string "B9 0B 00". Return to the
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previous menu and choose START SEARCH. The program will display a
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message that the string has been found.
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4. Move the cursor over the hex digits "0B" and type in "09" over them
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and press <ENTER>. A screen will appear with choices of action to
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take. Choose WRITE CHANGE TO DISK.
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5. When this operation is complete, repeat Step 3, with the exception of
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the hex data to enter. This time, the string to enter is "B9 68 0B".
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6. After the text is found, move the cursor over the "0B" and type in
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"09" over the top of these digits. Repeat the process of saving the
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new data to disk.
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7. Press <ESC> to return to the "Main Menu" and exit NORTON UTILITIES.
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Be sure to copy the "patched" KERNEL.EXE to the working directory or
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disk to be used when running emulation.
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8. Enter Model 12 emulation and verify that the changes have the correct
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affect.
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To alter KERNEL.EXE using the MS-DOS DEBUG program, do the following:
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1. Make sure the DEBUG program is available, then type the following:
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COPY KERNEL.EXE KERNEL.FIX<ENTER> {copy the kernel}
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DEBUG KERNEL.FIX<ENTER> {make sure DEBUG
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is available}
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-S 0 FFFE B9 0B 00<ENTER> {search for the opcodes}
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xxxx:yyyy {location of opcodes
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from DEBUG}
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-E xxxx:yyyy<ENTER> {enter editing mode}
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xxxx:yyyy B9.<SPACE> 0B.09<ENTER>{change 0B to 09 only}
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-S 0 FFFE B9 68 0B<ENTER> {search for next string}
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aaaa:zzzz {DEBUG prints address on
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screen}
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-E aaaa:zzzz<ENTER> {edit address supplied in
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previous step}
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aaaa:zzzz B9.<SPACE> 68.<SPACE> {change 0B to 09}
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0B.09<ENTER>
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-W {write the changes out
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to disk}
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-Q {quit the debugger}
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2. If you would like to save a copy of the original kernel, type:
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REN KERNEL.EXE KERNEL.OLD
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REN KERNEL.FIX KERNEL.EXE
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If you do not want to save a copy of the original kernel, type:
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COPY KERNEL.FIX KERNEL.EXE
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DEL KERNEL.FIX
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These changes should be performed only with those copies of 5251/12 emulation
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that connect to the System/34. They should never be made to any copy of
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5251/12 that normally connects to a System/36 or System/38.
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