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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 Soft-ICE
- WIN command to change the window size. Move the Soft-ICE window so you
- can see the instruction addresses on the left side of the screen. Now
- you can use the Soft-ICE G command to go to one of the addresses. Be
- sure to type in the full address, including the segment and the
- offset. Then enter 'G' in the CV window. At this point, CV is not
- active, so you can use the Soft-ICE T or P commands to step through t
- target program.
-
- CodeView's SHELL command : If you run the DOS shell from within the
- CodeView virtual machine, the DOS shell is part of the virtual
- machine. Because of this, you should not run any TSRs when you are in
- the DOS shell. If you do, when you exit CodeView the TSRs will
- disappear along with the virtual machine. This is dangerous, because
- any interrupt vectors that were not restored could hang your machine.
-
- CV's /R switch :Soft-ICE takes advantage of many of the 80386 features
- including the 80386 debug registers. This means that the debug
- registers are not available for CV, so you cannot use the CV /R switch
- when running with Soft-ICE. If you do use the /R switch, Soft-ICE
- gives you a general protection error. At this point, you can press "C"
- to continue, then rerun CV without the /R switch, and use the Soft-ICE
- break points. The CV /R switch works when you are running MCV without
- Soft-ICE.
-
- 10.04 The Soft-ICE ACTION Command
-
- The ACTION command allows three different methods activating CV from a
- Soft-ICE break point. The best choice of action is ACTION NMI. If you
- experience any problems with ACTION set to NMI (usually because an
- adapter card in your system is using NMI), use ACTION INT1.
-