Q38205: Capabilities of Real Mode CodeView and the 386

Article: Q38205
Product(s): See article
Version(s): 2.00
Operating System(s): MS-DOS
Keyword(s): ENDUSER | s_c, h_masm, h_fortran, s_pascal | mspl13_basic
Last Modified: 1-DEC-1988

The information below discusses the CodeView debugger and its use
of 80386 hardware capabilities.

The DOS CodeView does not keep track of any of this information because
DOS does not use any of these features. Essentially, a 386 running DOS
is just a very fast PC and CodeView treats it as such.

The OS/2 CodeView does not have the privilege to track many of the
OS/2 functionality.

The following is a list of CodeView behaviors:

1. CodeView does not keep track of task states.

2. CodeView does not handle privilege levels.

3. CodeView Version 2.20 makes limited use of the 386 debug
   registers. Previous versions do not use these registers.

4. CodeView does not keep track of interrupt gates and trap gates.

5. CodeView cannot operate in both real and Virtual 86 mode.

6. CodeView cannot trace to protected mode and back to real mode.

7. CodeView does not handle traces in protected mode.

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