          TCREF: THE SOURCE MODULE CROSS-REFERENCE UTILITY
          ================================================

TABLE OF CONTENTS
-----------------
1. What is TCREF?
2. How to Use TCREF
3. Compatibility with TLINK
4. TCREF Options
5. TCREF Reports


1. WHAT IS TCREF?
-----------------

  TCREF is designed to produce two reports: a cross-reference list of where 
  all global symbols are used and defined, and a list of individual modules 
  and the symbols used within them.


2. HOW TO USE TCREF
-------------------

  TCREF accepts as input a group of .XRF files produced by TASM. These files 
  contain cross-reference information for individual modules. From these input 
  files, a single .REF file is produced that contains one or more reports in 
  ASCII text. The command format follows:

    TCREF <XRF files separated by '+' characters> ','
       <REF filename> <switches>

  For example, the following would take the FOO1.XRF, FOO2.XRF, and FOO3.XRF 
  as input files and produce FOO.REF:

    TCREF foo1+foo2+foo3,foo

  Response files
  ---------------
  TCREF also accepts ASCII files as command strings. Simply precede the file 
  name with an @@ sign to include a file in the command string. For example,

    TCREF @@dofoo

  where DOFOO contains

    foo1+foo2+foo3,foo

  will do the same thing as the previous example.


3. COMPATIBILITY WITH TLINK
---------------------------

  TCREF accepts command strings that TLINK accepts. TCREF ignores any 
  irrelevant switches and fields, such as any libraries or MAP files, or
  switches that pertain only to the linker function. Similarly, if an .XRF 
  file cannot be located, TCREF will simply ignore it.

  Beware! When using a TLINK response file, don't explicitly specify file 
  extensions, since doing so will override TCREF's internal defaults and 
  possibly result in disaster. For example, if the response file reads aS

    foo1+foo2+foo3,foo.exe

  you should not use this file without modification with TCREF because the 
  .REF file it creates will be named FOO.EXE, presumably overwriting your 
  program.


4. TCREF OPTIONS
----------------

  TCREF accepts all the switches present in TLINK, but most of them are 
  discarded. TCREF only uses these options:

    /c makes GLOBAL report case-sensitive.

    /r generates LOCAL reports for all the specified modules.

    /p# sets report page length to # lines.

    /w# sets report page width to # columns.


5. TCREF REPORTS
----------------

  TCREF takes great care to make semantic sense of symbols. Cross-reference
  information is useless when symbols with the same name but different
  meanings are lumped together. TCREF therefore takes into account the
  SCOPE of a symbol when producing its reports. Cross-reference information
  is always listed for the source file and source line number.

  Global (or linker-scope) report
  -------------------------------

  TCREF's global report lists cross-reference information for global symbols 
  as they appear to the linker. Use the /c switch if you want to produce 
  case-sensitive reports.

  In this report, global symbols appear alphabetically in the left column.
  References, organized by source file, are listed in the right column.
  Wherever #'s appear indicates that definition occurs at that line.

  Here's an example symbol printout:

    Global Symbols       Cref  #  = definition
    BAR                  TEST.ASM:  1  3  6  9  12  15  18 +
                                                21  23  29
                                          #  TEST2.ASM:  2  4  6  #8

  What does this tell you? The leading # sign before the TEST2.ASM indicates 
  that BAR was defined somewhere in that module. For each source file, the 
  source line at which the reference occurred is listed. This list can occupy
  more than one line, as in the case of the lines for TEST.ASM. The + 
  character indicates that wrap has occurred. Finally, the # sign before the 
  8 indicates that a definition of BAR occurred in TEST2.ASM on line 8.

  The local (or module-scope) report
  ----------------------------------

  If you specify /r on the command line, a local report will be made for
  each module. It will contain all the symbols used in that module, listed 
  in alphabetical order. The /c switch will have no effect on these reports, 
  since the appropriate case-sensitivity has already been determined at 
  assembly time.

  Like global reports, references are organized by source file in the right 
  column. A sample printout looks like this:

    Module TEST.ASM Symbols        Cref  # = definition
    UGH                            TEST.ASM:  1  3  6  9  12  15  18 +
                                                          21  23  29
                                                   #  UGH.INC:  #2

