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- CHAPTER 1
-
- Introduction
- 1.1 Product Description
- 1.2 Using This Manual
- 1.3 System Requirements
-
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-
- 1.1 Product Description
-
- Soft-ICE is a software debugging tool that provides hardware-level
- debugging capabilities to PCDOS and MSDOS debuggers.
-
- Soft-ICE uses 80386 protected mode to run DOS in a virtual machine. This
- gives Soft-ICE complete control of the DOS environment. Soft-ICE uses
- 80386 protected mode features, such as paging, I/O privilege level, and
- break point registers, to add hardware-level break points your existing
- DOS debugger.
-
- Soft-ICE was designed with three goals in mind:
- 1. To utilize the 80386 virtual machine capability to
- debugging features that are impossible or
- prohibitively slow with software-only debuggers
- (e.g., real time hardware-level break points,
- memory protection, breaking out of hung
- programs, etc.).
- 2. To work with existing debuggers. We wanted to
- provide a tool that worked with existing tools. We
- designed Soft-ICE in such a way that you don't
- have to learn a new debugger to get powerful
- hardware debugging capabilities.
- 3. To be a user-friendly program with a window that
- pops up instantly and does not get in the way. All
- of the Soft-ICE commands were designed to fit in a
- small window so that information on the screen
- behind Soft-ICE could still be viewed. Dynamic
- on-line help assists users who only use Soft-ICE
- occasionally.
-
- The Soft-ICE program features:
- * real time break points on memory reads/writes,
- port reads/writes, memory ranges, and interrupts
-
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-
- * back trace history ranges
- * symbolic and source level debugging
- * an environment that works with existing debuggers
- * full EMM 4.0 support
- * backfilling to raise base memory past 640K for
- monochrome systems
- * a window that can pop up at any time
- * the ability to break out by keystroke even if
- interrupts are disabled
- * debugger code that is isolated by 80386 protected
- mode. This prevents an errant program from
- modifying or destroying Soft-ICE; even if DOS
- clobbered, Soft-ICE will still work
- * the ability to configure Soft-ICE to use no memory
- in the lower 640K if the system has more than 640K
- * user-friendly dynamic help
- * the ability to be used as a stand-alone debugger.
- This ability is useful if you are debugging loadable
- device drivers, interrupt handlers, or boot
- sequences where traditional debuggers can't go,
- if your debugger suffers from re-entrancy problems
- * a soft boot capability that allows debugging with
- non-DOS operating systems or self-booting
- programs
- * a simple installation, with no DIP switches to set
- no I/O ports taken up, and no memory address
- space conflicts
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-
- NOTE:
- Soft-ICE will work with real address mode programs
- only. It will not work with programs that use 80286 or
- 80386 protected mode instructions.
-
- 1.2 Using This Manual
-
- The Soft-ICE manual is divided into four main sections:
- Learning Soft-ICE (Section I)
- Commands (Section II)
- Support Features (Section lII)
- Advanced Topics (Section IV)
-
- Soft-ICE can be used for most debugging problems after reading Section I,
- "Learning Soft-ICE", and a little experimentation. Soft-ICE's user-
- friendly on-line help can be used to reference command descriptions and
- syntax.
-
- The "Learning Soft-ICE" section contains installation instructions, a
- description of the user interface, and a tutorial. The tutorial is
- designed to get you up and running quickly.
-
- The "Commands" section describes all of the Soft-ICE commands. The command
- descriptions are organized by functional group with an alphabetic index
- for reference.
-
- The "Support Features" section covers advanced loading options, symbolic
- and source level debugging, and EMM 4.0 capability.
-
- The "Advanced Topics" section covers topics such as using Soft-ICE with
- DOS loadable drivers and using Soft-ICE with non-DOS operating systems.
-
- Throughout the manual, especially in the tutorial and the command section,
- examples are given that require you to give data to Soft-ICE. When the
- directions specify that you
-
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-
- "press" a key, such as the key, you should press the key labelled . When
- the directions tell you to "enter" a phrase, such as WIN, you should type
- in the specified letters, then press the ENTER key.
-
- 1.3 System Requirements
-
- Soft-ICE works with the IBM Series II Model 70 and 80, Compaq 80386 and
- 80386SX computers, AT compatible and 80386 co-processor cards. Soft-ICE
- will only work with 80386 XT co-processors if they are AT compatible.
-
- Soft-ICE works best with extended memory, but works fine with conventional
- memory systems.
-
- Soft-ICE does not use DOS or ROM BIOS for its video output and keystroke
- input. Therefore the video must be compatible with one of the following:
- MDA, Hercules, CGA, EGA, or VGA. Soft-ICE also has support for a two-
- monitor configuration, which can be very helpful when debugging video-
- intensive programs.
-
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