You may want to specify or change entries in TOOLS.INI to customize CodeView. Table 8.1 summarizes the TOOLS.INI entries.
Table 8.1 CodeView TOOLS.INI Entries
| Entry | Description |
| Autostart | Commands to execute on startup |
| Color | Screen colors |
| Cvdllpath | Path to CodeView .DLL files |
| Eval | Expression evaluator |
| Helpbuffer | Size of help buffer |
| Helpfiles | List of help files |
| Model | Additional execution model (such as p-code) |
| Native | Native execution model |
| Printfile | Default name for print command or file |
| Statefileread | Read or ignore CURRENT.STS state file |
| Symbolhandler | Symbol handler |
| Transport | Transport layer |
The Autostart entry specifies a list of Command-window commands that CodeView executes on startup.
Autostart:command[[;command]]...
command
A command for CodeView to execute at startup. Separate multiple commands with a semicolon (;).
The following entry automatically executes the program's run-time startup code. It specifies that CodeView always starts with the Screen Swap option off and the Trace Speed option set to fast.
Autostart:OF-;TF;Gmain
The Color entry is retained only for compatibility with previous versions of CodeView. You should set screen colors with the Colors command on the Options menu.
The Cvdllpath entry specifies the default path for CodeView's dynamic-link libraries (DLLs). CodeView searches this path when it cannot find its DLLs in CodeView's directory or along the PATH environment variable. This entry is recommended.
Cvdllpath:path
path
The path to the CodeView .DLL files.
The Eval entry specifies an expression evaluator. The expression evaluator looks up symbols, parses, and evaluates expressions that you enter as arguments to CodeView commands. If there is no Eval entry in TOOLS.INI, CodeView loads the C++ expression evaluator by default. CodeView uses the specified expression evaluator when you are debugging modules with source files ending in the specified extensions.
Eval:[[path\]]EEhostevaluator.DLL extension...
path
The path to the specified expression evaluator.
host
The host environment.
| Specifier | Operating Environment |
| D1 | MS-DOS |
| W0 | Windows |
evaluator
The source language expression evaluator.
| Specifier | Source Language |
| CAN | C or MASM |
| CXX | C, C++, or MASM |
extension
A source-file extension. CodeView uses the specified expression evaluator when it loads a source file with the given extension. You can list any number of extensions.
The following example loads both the C and C++ expression evaluators for the MS-DOS CodeView:
Eval:C:\C700\DLL\EED1CAN.DLL .C .ABC .ASM .H
Eval:C:\C700\DLL\EED1CXX.DLL .CPP .CXX .XYZ .HXX
With the entries in this example, when you trace into a module whose source file has the extension .C, .ABC, or .ASM, CodeView uses the C expression evaluator. When you trace into a source file with a .CXX, .CPP, or .XYZ extension, CodeView switches to the C++ expression evaluator. Note that the C++ expression evaluator alone is sufficient for most C, C++, and MASM programs.
You can load expression evaluators after CodeView has started by using the Load command from the Run menu. You can override CodeView's automatic choice of expression evaluator by using the Language command on the Options menu or the USE command in the Command window.
For more information about choosing an appropriate expression evaluator and how to use expressions in CodeView, see Chapter 11, “Using Expressions in CodeView.”
The Helpbuffer entry specifies the size of the buffer CodeView uses to decompress help files. You can set Helpbuffer to 0 to disable Help and maximize the amount of memory available for debugging. Otherwise, specify a value between 1 and 256.
Helpbuffer:size
size
The number of kilobytes (K) of memory to use for decompressing help files. The default help buffer size is 24K. Specify 0 to disable help.
The following table shows values you can specify and the actual size of the buffer that is allocated:
| Value Specified | Help Buffer Size |
| 1–24 | 24K |
| 25–128 | 128K |
| 129–256 | 256K |
The smallest buffer size is 24K, and the largest is 256K.
The Helpfiles entry lists help files for CodeView to load. These files are loaded before any files listed in the HELPFILES environment variable.
Helpfiles:file[[;file]]...
file
A directory or help file. If you list a directory, CodeView loads all files with the .HLP extension in that directory. Separate multiple files or directories with a semicolon (;).
The Model entry specifies an additional execution model that CodeView uses when you are debugging nonnative code such as p-code. The execution model handles tasks specific to the type of executable code that you are debugging.
Model:[[path\]]NMhostmodel.DLL
path
The path to the specified file.
host
The host environment must be one of the following:
| Specifier | Operating Environment |
| D1 | MS-DOS |
| W0 | Windows |
model
A nonnative execution model. The p-code execution model (PCD) is required if you plan to debug p-code.
Model:NMD1PCD.DLL
The Native entry specifies the native execution model. This DLL handles tasks that are specific to the machine and operating system on which you are running (the host) and specific to the native code (the target).
Native:[[path\]]EMhosttarget.DLL
path
The path to the specified native execution model.
host
The host environment must be one of the following:
| Specifier | Operating Environment |
| D1 | MS-DOS |
| W0 | Windows |
target
The target environment must be one of the following:
| Specifier | Operating Environment |
| D1 | MS-DOS |
| W0 | Windows |
The Printfile entry lists the default device name or filename used by the Print command on the File menu. This can be a printer port (for example, LPT1 or COM2) or an output file. If Printfile is omitted, CodeView prints to a file named CODEVIEW.LST in the current directory. This entry is ignored by CVW, which does not have the Print command.
Printfile:path
path
The path to the specified output file or the name of a device.
The Statefileread entry tells CodeView to read or ignore the CodeView state file (CURRENT.STS) on startup. You can toggle this setting from the command line using the /TSF (Toggle State File) option. These options have no effect on writing CURRENT.STS. CodeView always saves its state on exit.
Statefileread:[[y|n]]
y (yes)
CodeView reads CURRENT.STS on startup.
n (no)
CodeView ignores CURRENT.STS on startup.
The Symbolhandler entry specifies a symbol handler. The symbol handler manages the CodeView symbol and type information.
Symbolhandler:[[path\]]SHhost.DLL
path
The path to the symbol handler.
host
The host environment must be one of the following:
| Specifier | Operating Environment |
| D1 | MS-DOS |
| W0 | Windows |
The Transport entry specifies a transport layer. A transport layer provides the data link for communication between the host and target during debugging.
Transport:path\TLhosttransport.DLL
path
The path to the specified transport layer.
host
The host environment must be one of the following:
| Specifier | Operating Environment |
| D1 | MS-DOS |
| W0 | Windows |
transport
Specifies a transport layer.
| Specifier | Transport Layer |
| LOC | Local transport layer |
| COM | Serial remote transport layer |
You specify the local transport layer (LOC) when the debugger and the program you are debugging are running on the same machine. With the appropriate transport layer, CodeView can support remote debugging across serial lines or networks. For more information on remote debugging, see Chapter 10.
The following example specifies the transport layer for debugging a program that is running on the same machine.
Transport:C:\C700\DLL\TLW0LOC.DLL