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si-ug-chapter10.txt
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CHAPTER 10 - Using Soft-ICE with MagicCV or MagicCVW
10.01 Introduction
10.02 Running Soft-ICE with MagicCV or MagicCVW
10.03 Special Considerations
10.04 The Soft-ICE ACTION command
10.01 Introduction
MagicCV allows you to run Microsoft's CodeView in less than 8K of
conventional memory on your 80386 machine.
MagicCVW allows you to run Microsoft's CodeView for Windows in less
than 8K of conventional memory on your 80386 machine.
Using Soft-ICE in combination with MagicCV or MagicCVW allows you to
have the power of Soft-ICE while still having the convenience of using
the CodeView product that you are familiar with.
In the rest of this chapter, statements about MCV will apply to both
MagicCV and MagicCVW, and statements about CV will apply to both
CodeView and CodeView for Windows.
10.02 Running Soft-ICE with MagicCV or MagicCVW
To use Soft-ICE 2.0 and MCV together, you must install S-ICE.EXE as a
loadable device driver. S-ICE.EXE comes on the Soft-ICE diskette. S-
ICE.EXE replaces NUMEGA.SYS in CONFIG.SYS. Use the /MCV, /EMM, and the
/EXT switches as if using MagicCV or MagicCVW alone. There are
additional switches that you may want to use for Soft-ICE. Refer to
chapter 6 for information about these switches.
To run MagicCV or MagicCVW after Soft-ICE has been loaded, refer to
your MagicCV or MagicCVW manual.
Notes : MagicCVW requires Soft-ICE version 2.00 or greater. MagicCV
requires Soft-ICE version 1.02 or greater. The S-ICE.SYS and
NUMEGA.SYS drivers were shipped with some versions of Soft-ICE. The
S-ICE and NUMEGA drivers must be replaced by S-ICE.EXE before you can
run MagicCV and Soft- ICE 2.0 together.
10.03 Special Considerations
Two Virtual Machines : When you are using both Soft-ICE and MCV
together, you must keep in mind that CV is in a separate virtual
machine from the target environment. You can pop Soft-ICE up from
either virtual machine, i.e., when CV is running, or when the target
program is running.
If you pop Soft-ICE up while the target program is running everything
works as defined in the Soft-ICE manual. If you pop Soft-ICE up while
CV is running (typically done to break points), you must keep a few
points in mind:
* The registers are those of CV and they CAN NOT be changed.
* For convenience, the Soft-ICE MAP command displays the memory map of
the target program virtual machine, not the memory map of the CV
virtual machine. The highlighted area in the memory map may not be
correct.
* Any display or modification of memory occurs in the target program's
virtual machine.
* You have no visibility into the CV virtual machine except for the
display of register values. Remember that when popping up the Soft-ICE
window while CV is active, the register values are those of CV and
should not be modified.
* Instruction and program tracing is disabled from the Soft-ICE window
when CV is active. This is to prevent confusion, because a trace would
actually step through CV, not through the target program. If you
attempt to do a Soft-ICE Trace (T) or Program Step (P) command while
CV is active, you will get the warning message: "Function not
available in CV virtual machine." To trace through your target program
code instead, you can do one of two options:
* Use the CV trace command. To do this, exit the Soft-ICE window using
the Soft-ICE X command, then do one or more CV traces to step through
the target program.
* Use Soft-ICE to go to the target program address, then use the
Soft-ICE T or P commands to step through your target program. To do
this, exit the Soft-ICE window with the Soft-ICE X command, then press
the 'F3' key until CV is in 'mixed mode'. This allows you to see both
the source lines and the instruction addresses. Pop up Soft-ICE. If
the Soft-ICE window is not already in narrow mode, use the S