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EXAMINE command

The EXAMINE command displays the contents of a memory location.


Format

     @EXAMINE (MEMORY LOCATION) octal or symbolic address


Output

     Contents of Memory Location or Message

          When you complete an EXAMINE command, the system prints  the
          memory  address  examined,  followed  by a slash (/) and its
          contents.  If you  previously  used  the  SET  TYPEOUT  MODE
          SYMBOLIC  command, this information is both in symbolic and,
          in  parentheses,  numeric  (octal)  format.   (The   numeric
          information  will  always  appear  for  this  setting of the
          command; symbolic information  will  appear  if  the  system
          finds that it is different from the numeric.)

          Generally the numeric format shows two 6-digit octal numbers
          separated  by a pair of commas (,,).  If you do not see this
          pair of commas, only the right half of the  memory  location
          is  being displayed; as the left half is 0.  However, if you
          are not permitted  to  examine  this  location,  the  system
          prints only a message telling you of the restriction.


Hints

     Using Symbols

          For symbols that  are  defined  in  multiple  modules  of  a
          program,  you  can  be  specific  by  giving the module name
          followed by an ampersand (&) and the symbol name.

     Abbreviating EXAMINE

          The EXAMINE command can be abbreviated by the single  letter
          E.

     Default Argument for EXAMINE

          The argument of your current EXAMINE command defaults  to  a
          value  greater by 1 than the last address examined, allowing
          you to inspect a section of memory with only  a  minimum  of
          typing.   But if you gave a more recent DEPOSIT command, the
          argument of your current EXAMINE command  defaults  to  that
          address, allowing you to verify the deposit.

     Using EXAMINE With Noncurrent and Inferior Forks

          The EXAMINE command displays memory locations of the current
          fork.   To  examine  the  memory  of  noncurrent or inferior
          forks, make the fork the current fork  by  giving  the  FORK
          command with the fork name or number as an argument.

          To run an inferior fork after examining it, you must  ensure
          that  all superior forks are running too.  Give the CONTINUE
          command with the superior fork name or number as an argument
          to let the superior fork continue its inferiors.


Related Commands

     DDT                          for  calling  a  debugging  program,
                                  allowing  more efficient examination
                                  of memory

     DEPOSIT                      for  changing  the  contents  of   a
                                  specific memory location

     FORK                         for selecting the fork whose  memory
                                  you want to examine

     INFORMATION MEMORY-USAGE     for  displaying  a  list  of  memory
                                  pages, their contents and status

     SET TYPEOUT MODE             for   displaying   information    in
                                  symbolic or numeric format


Examples

     1.  Examine location 550 of the current fork.

              @EXAMINE 550
              550/    74473,,414155

     2.  Examine location 20, first in numeric typeout mode,  then  in
         the symbolic mode.

              @SET TYPEOUT MODE NUMERIC
              @EXAMINE 20
              20/ 104000,,56

              @SET TYPEOUT MODE SYMBOLIC
              @EXAMINE 20
              P+1/ 104000,,.JBBLT+11   (20/ 104000,,56)

     3.  Put a  program  into  memory  and  find  out  what  pages  it
         occupies.   Examine a location on page 2, and then (using the
         abbreviated form of the EXAMINE command) one on page 400.

              @GET DMN
              @INFORMATION MEMORY-USAGE

               5. pages, Entry vector loc 400010 len 254000

                Section 0    R, W, E,  Private
              0-3      DMN.EXE.1  1-4   R, CW, E
               400     DMN.EXE.1  5   R, CW, E

              @EXAMINE 2550
              2550/   600170
              @E 400550
              400550/ 0