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- February 13, 1990
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- CoreScan documentation
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- CORESCAN is a program that allows the user to display, in
- hexadecimal format, any portion of your PC's memory. When it
- first comes up, it is displaying the lowest segment of
- memory. It then waits for a response.
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- Depending on the response, it will:
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- 1. Show a different section of main memory (any section).
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- 2. Show a section of expanded memory (if it is available).
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- 3. Show a section of extended memory (if it is available).
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- 4. Allow you to change the displayed main memory section.
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- 5. Allow you to search for particular patterns in memory.
- these can be either hexadecimal or ascii.
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- 6. Display the interrupt vectors and the paragraph pointed
- to by the vector.
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- 7. Exit.
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- The normal Pageup, Pagedown, Left-arroww, Right-arrow keys
- may be used to manouver through memory, or you can directly
- display any section by entering the segment-register:offset-
- value. When you are displaying the extended or expanded
- memory, you must enter the memory address. If you enter one
- of the direction keys, the program will show you the area
- surrounding its buffer (probably not what you had in mind.)
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- You may change any writable section of the lower 1MB of
- memory by merely displaying it, and entering the edit mode.
- If you attempt to modify a portion of memory used by DOS for
- some purpose, you stand the chance of disasterous results.
- Probably the worst that will happen is that the system
- "locks up" and you have to re-boot. NOTE: you cannot modify
- the expended or extended memory. It just simply gets too
- dangerous to allow.
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- The allowable keys are always displayed on the lower two
- lines of the screen. When practical, their function is also
- shown. The line above those displays the current "ascii/hex"
- mode that you are in.
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- Besides the "direction" keys, some of the function keys are
- defined for specific purposes. They are:
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- F-1 - Enters the modify mode.
- F-5 - Enters the mode to display expanded memory
- F-6 - Enters the mode to display extended memory
- F-8 - Toggles the ASCII/HEX mode
- F-9 - Displays the interrupt vectors.
- F-10- Enters the search mode.
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- The search and modify modes change slightly depending on the
- condition of the ASCII/HEX mode.
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- To exit a mode, press the escape key.
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- When you are in the memory display mode, further depressing
- the escape key exits the program.
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- If you cause the program to exit in some unusual manner, re-
- boot your system immediately. The program may have been in
- the protected mode. (A mode that DOS shouldn't be left in.)
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- If you have a protected mode driver already in the system,
- CORESCAN won't allow access to protected modes and you won't
- realize the full potential of the program. You should either
- remove the startup of the protected mode driver and re-boot
- your computer or use only the portion of CORESCAN available
- for use under the driver you are using.
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- CORESCAN and this doc file are Copyrighted (c) 1989, 1990 by
- Paul Warner. I am releasing CORESCAN as shareware. This
- means that you may freely use and copy the program provided
- that no changes are made to either the program or this
- document file. In fact I hope you will give a copy of
- CORESCAN to everyone you know. However, if you find CORESCAN
- useful,
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- please send $20.00 to:
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- Paul Warner
- 205 Raymond Rd.
- Princeton, NJ 08540
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- DISCLAIMER
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- This program is provided "as is" with no warranties
- whatsoever, either expressed or implied, including without
- limitation, warranties of merchantability or fitness for a
- particular purpose. The entire risk as to the quality and
- performance of the program is with you. Should this program
- be defective, you assume the entire cost of all necessary
- servicing, repair or correction.
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