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- PCMAP - Version 2.0 - Jeff Hasty - April, 1989
-
- This program displays a map of the currently allocated memory blocks. For each
- block, the following information is displayed:
-
- Segment address of block
- Segment address of block's owner (program which allocated the block)
- Size of block in paragraphs (paragraph = 16 bytes)
- Type of block: PSP - Program segment prefix and main program code
- ENV - A copy of the DOS environment
- (blank) - Other
- Name of owner of block (DOS 3.0 and later)
-
- Syntax: PCMAP [/R]
-
- The /R switch causes the program to install itself (remain resident in memory).
- Pressing ALT-P will then display the memory map. The current display screen
- is preserved. However, if a previously installed copy is resident, running
- PCMAP with the /R switch will instead uninstall that copy. If uninstallation
- is not possible (usually because of other subsequently installed programs), it
- will inactivate the ALT-P hotkey. Running the program again with the /R switch
- will reactivate the hotkey.
-
- The maximum number of blocks is 23, to prevent scrolling off the screen.
- This may be increased by changing the equate at the beginning of the source
- code. The hotkey may also be changed in the same way.
-
- CONFLICTS:
- Although having PCMAP resident doesn't affect most applications, there are
- some significant exceptions. Programs COMPILED with Turbo Pascal, versions
- 4 or 5, will HANG if PCMAP is resident, requiring a cold boot. You can run
- Turbo Pascal itself without problems. Turbo assembler works fine. I don't
- have access to Turbo C, so I don't know about it. Trying to run Tapcis or
- Tetris will also HANG your computer. If anyone encounters other conflicts,
- I would appreciate a note about it through CompuServe, 71121,2352.
-
- CREDITS:
- Many of the ideas and techniques, as well as much of the code, used in this
- program came from the following articles in PC Magazine:
-
- Robert L Hummel's PCMAP, V6N14, p.419, 8/87. This is the original
- PCMAP, the inspiration for my version.
- Frank Deaver and David Thomas' RAMVIEW, V7N14, p.367, 8/88. The
- memory residency portions of RAMVIEW were slightly modified and used
- for PCMAP.
- Ray Duncan's ARGV, V6N22, p.365, 12/22/87. A stripped-down version
- of this routine is used for detection of the command line switch.
-
- BUGS, SUGGESTIONS:
- Bug reports, suggestions for improvements, conflicts with specific hardware
- or software can be sent to me via CompuServe 71121,2352. I am particularly
- interested in solving the problem with Turbo Pascal-compiled programs. The
- same problem has been reported with RAMVIEW. If you have any insights, please
- let me know.
-