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- CHAPTER 6 - Soft-ICE Initialization Options
-
- 06.01 Introduction
- 06.02 Loading Soft-ICE from the DOS Prompt
- 06.03 Loading Soft-ICE as a Loadable Device Driver
- 06.03.01 Soft-ICE Loading Switches
- 06.04 The Soft-ICE Initialization File S-ICE.DAT
- 06.04.01 Special Configuration Options
- 06.04.02 Function Key Assignments
- 06.04.03 Initialization Command Sequence
-
- 06.01 Introduction
-
- The Soft-ICE program file (S-ICE.EXE) can be loaded as a loadable
- device driver in CONFIG.SYS or as a program from the DOS command line.
- To get the full power of Soft-ICE, it must be initially loaded as a
- device driver in CONFIG.SYS. However, there may be circumstances when
- you might want to run Soft-ICE from the DOS prompt or a batch file,
- such as:
-
- * You do not have extended memory in your system Soft-ICE can only
- load as a loadable device driver if you have extended memory.
-
- * You want to take up ZERO bytes of conventional memory. When
- loaded as a device driver, Soft-ICE occupies approximately 2K of
- conventional memory.
-
- * You only need to use Soft-ICE occasionally and there are no other
- programs using extended memory. In some cases you may need some
- of the features that require Soft-ICE to be loaded in CONFIG.SYS
- but do not want Soft-ICE to be resident all of the time. In this
- case Soft-ICE can be loaded in CONFIG.SYS to reserve extended
- memory, and then disabled, by using the /UN switch, until Soft-
- ICE is required. See section 6.3.1 for more information about the
- /UN switch.
-
- 06.02 Loading Soft-ICE from the DOS Prompt
-
- You can NOT enable all of Soft-ICE's features when loading from the
- DOS prompt. If you will be using Soft-ICE as a stand-alone debugger,
- it is recommended you load Soft-ICE in the CONFIG.SYS file.
-
- To load Soft-ICE from the DOS prompt type:
-
- S-ICE
-
- In systems with no extended memory present, Soft-ICE loads itself at
- the highest memory location possible. The memory used by Soft-ICE is
- then 'mapped out', making it invisible to DOS programs. Since the
- total memory visible to DOS and its programs is less after Soft-ICE
- loads, it is recommended that you load Soft-ICE before any TSR's
- control programs.
-
- In systems with extended memory, you should only load Soft-ICE from
- the DOS prompt if you are not using extended memory for anything else
- (e.g., VDISK, CACHE, HIMEM...). When you initially load Soft-ICE from
- the command line or from a batch file, Soft-ICE will prompt you with a
- warning message. This warning message is just to remind you that
- Soft-ICE will overwrite the highest portion of extended memory when it
- loads. You can suppress this warning prompt with the EXTENDED option
- in the Soft-ICE configuration file S-ICE.DAT. For more information
- about the EXTENDED option, see section 6.4.1.
-
- 06.03 Loading Soft-ICE as a Loadable Device Driver
-
- In order to use all of the Soft-ICE features, you must first load
- Soft-ICE as a loadable device driver in your CONFIG.SYS file. The
- features this makes possible are:
-
- * Coexisting with other software that uses extended memory. Loading
- as a device driver allows Soft-ICE to manage extended memory so
- you can run Soft-ICE with programs that use extended memory, such
- VDISK, CACHE and HIMEM.
-
- * Symbolic and source level debugging Loading as a device driver
- allows Soft-ICE to allocate an extended memory buffer for symbols
- and source information.
-
- * Back trace ranges and the SNAP command Loading as a device driver
- allows Soft-ICE to allocate an extended memory buffer for a back
- trace buffer. This buffer is also used for the Soft-ICE SNAP
- command.
-
- * Enabling Soft-ICE's EMM 4.0 capability
-
- * Running Soft-ICE with MagicCV or MagicCVW
-
- Note : When loaded as a device driver in CONFIG.SYS, Soft-ICE
- allocates the highest portion of extended memory for itself and its
- associated components, so there can be no memory conflicts. S-ICE.EXE
- must be loaded in CONFIG.SYS before any other driver that allocates
- extended memory loaded (e.g., VDISK.SYS, RAMDRIVE.SYS). Generally
- Soft-ICE works best if it is the first loadable device driver
- installed in CONFIG.SYS.
-
- 06.03.01 Soft-ICE Loading Switches
-
- One or more loading switches can follow S-ICE.EXE in CONFIG.SYS. These
- switches allow you to customize the way extended memory will be
- reserved by Soft-ICE. The switches all must begin with a / character.
- The loading switches are:
-
- * /EXT XXXX: Informs S-ICE.EXE to reserve XXXX Kilobytes of
- extended memory for other DOS programs that use extended memory
- (e.g., VDISK, CACHE, HIMEM,...). If the /EXT switch is not
- present, then any extended memory not used by Soft-ICE and its
- associated components will be left as standard extended memory,
- but the amount can not be guaranteed. The /EXT switch is useful
- because it is sometimes difficult to determine exactly how much
- memory being used by Soft-ICE and its associated components.
- Using the /EXT switch will guarantee a specified amount is
- available for other programs that use extended memory.
-
- * /SYM XXXX: Informs S-ICE.EXE to reserve XXXX Kilobytes of
- extended memory for symbols and source usage. If XXXX is not
- specified, then all remaining extended memory is used for
- symbols. Enough memory must be allocated for your .SYM file and
- all source files. For more information about using symbols and
- source, see chapter 7.
-
- * /TRA XXXX: Informs S-ICE.EXE to reserve XXXX Kilobytes of
- extended memory for a back trace history buffer. This buffer is
- used for back trace ranges and for the SNAP command. If XXXX is
- not specified, then 10K of extended memory is automatically
- reserved for the buffer. If you do not want any memory reserved
- for a back trace buffer, use /TRA 0. For more information about
- using back trace ranges, see chapter 9.
-
- * /MCV XXX: Informs S-ICE.EXE to reserve XXX Kilobytes of extended
- memory for MagicCV or MagicCVW. The minimum amount of extended
- memory you can specify is 280K and the maximum is 620K. If XXX is
- not specified, S-ICE.EXE will reserve the remaining memory,
- between 280K and 620K. See chapter 10 for more information about
- running Soft-ICE with MagicCV or MagicCVW.
-
- * /EMM XXXX: Informs S-ICE.EXE to turn XXXX Kilobytes of extended
- memory into EMM 4.0 conforming expanded memory. If XXXX is
- specified, then all remaining memory is used as expanded. See
- chapter 8 for more information about expanded memory support.
-
- * /UN: Informs S-ICE.EXE to enter protected mode, reserve any
- needed extended memory, then exit protected mode and unload
- itself. This switch should be used when you are loading S-ICE.EXE
- as a loadable device driver, but you don't want your system to
- remain in protected mode. This switch will reserve memory for
- Soft-ICE, and you must execute S-ICE.EXE from the DOS prompt when
- you are ready to use Soft-ICE.
-
- Soft-ICE reserves extended memory in the following order, regardless
- of the order the switches are specified:
-
- * Reserve approximately 120K for S-ICE.EXE.
- * Reserve memory for the /EXT switch if present.
- * Reserve memory for the /SYM switch if present.
- * Reserve memory for the /TRA switch if present. If it is not
- present, default to reserve 10K for the back trace buffer.
- * Reserve memory for the /MCV switch if present.
- * Reserve memory for the /EMM switch if present.
-
- If available memory runs out while trying to reserve memory for a
- switch in the above sequence, then S-ICE.EXE does the following:
-
- 1. The remaining extended memory is allocated to switch being
- processed when memory runs out.
-
- 2. No memory will be reserved for the remaining switches.
-
- Note : If the /MCV or /EMM switch is present, a additional 64K of
- extended memory is reserved for a DMA holding buffer.
-
- The switches can be placed in any order following DEVICE = S-ICE.EXE.
- example is:
-
- DEVICE = S-ICE.EXE /TRA50 /EMM 500 /SYM 2048
-
- If four megabytes of extended memory are available, this example will
- reserve approximately 120K for Soft-ICE, 2 megabytes for symbols, 50K
- for a back trace history buffer, 500K for expanded memory and leave
- approximately 1.3 megabytes for other extended memory programs. Note
- that Soft-ICE will load into the highest portion of extended memory,
- leaving the remaining memory starting at 100000H (one megabyte mark).
-
- 06.04 The Soft-ICE Initialization File S-ICE.DAT
-
- Soft-ICE has several load options. These options are specified by
- placing special commands in an initialization file named S-ICE.DAT.
-
- S-ICE.DAT is an ASCII text file that Soft-ICE parses at load time.
- This file can contain function key assignment an auto-start string and
- various configuration options. The file can be created and edited with
- any DOS text editor. When loading Soft-ICE from the command line,
- S-ICE.DAT must be placed in the current directory or in a directory
- that is accessible through your current PATH. When Soft-ICE is loaded
- as a device driver in CONFIG.SYS, S-ICE.DAT must be in the same
- directory where S-ICE.EXE is located.
-
- There are three categories of commands that can be included in the
- S-ICE.DAT initialization file:
-
- * Special configuration options
- * Function key assignments
- * Initialization command sequence
-
- 06.04.01 Special Configuration Options
-
- Any of the following configuration options that are needed should each
- be placed on a separate line in the S-ICE.DAT file.
-
- * COMPAQ: Compaq 386 and 386SX computer and some Compaq compatible
- computers (including computers containing Micronix motherboards)
- have 384K of non-contiguous extended memory. The COMPAQ option is
- necessary if you want Soft-ICE to use this memory. Note that the
- COMPAQ option is the same as the /C command line parameter in
- Soft-ICE 1.X.
-
- * NOLEDS: The NOLEDS option tells Soft-ICE not to set and clear the
- keyboard LEDs while the Soft-ICE window is up. On some keyboards
- the are timing problems that will cause Soft-ICE to lose
- synchronization with the keyboard. If Soft-ICE hangs when you are
- in the Soft-ICE window use this option. Note that the NOLEDS
- option is the same as the /L command line parameter in Soft-ICE
- 1.X.
-
- * NOTVGA: The NOTVGA option allows Soft-ICE to run on BIOS
- compatible VGA cards. Many VGA cards are not compatible with IBM
- VGA at the hardware level. These cards support VGA at the BIOS
- level only. Use this switch if you have one of those video
- adapters. Note that the NOTVGA option is the same as the /V
- command line parameter in Soft-ICE 1.X.
-
- * EXTENDED: The EXTENDED option causes Soft-ICE to load directly
- into extended memory without prompting the user with a warning
- message. It should be used if you are loading Soft-ICE initially
- from the DOS prompt and do want to be prompted, and you know
- nothing else using extended memory. Note that the EXTENDED option
- is the same as the /E command line parameter in Soft-ICE 1.X.
-
- 06.04.02 Function Key Assignments
-
- One or more Soft-ICE commands can be assigned to any function key at
- load time. See the description of the FKEY command in section 5.8
- (Debugger Customization Commands) for a description of assigning
- function keys from the Soft-ICE command line.
-
- The syntax for assigning a function key name in S-ICE.DAT is :
-
- Function-key-name = "string"
-
- Function-key-name : F1, F2... F12.
-
- String : The string may consist of any valid Soft-ICE commands and the
- special characters ^ and ;. A ^ is placed in the string to make a
- command invisible. A ; is placed in the string denote a carriage
- return. The string must be enclosed in double quotes.
-
- An example function key assignment in S-ICE.DAT is:
-
- F12 = "D 100;"
-
- This will assign the Soft-ICE dump command to function key 12. When
- F12 is pressed Soft-ICE will dump at offset 100H in the current data
- segment. The semi-colon following the 100 represents the ENTER key.
-
- 06.04.03 Initialization Command Sequence
-
- A sequence of commands can be automatically executed when Soft-ICE
- loads. This is useful for customizing Soft-ICE to meet your needs. For
- example, you might set up windows and change the default hot key
- sequence. The syntax for setting up an initialization command sequence
- in S-ICE.DAT is:
-
- INIT = "assignment-string"
-
- Assignment string : The string consists of any valid SoftICE cmd and
- the special characters ^ and ;. A ^ is placed in the string to make a
- command invisible. A; is placed in the string denote a carriage
- return. The string must be enclosed in double quotes.
-
- An example initialization command sequence in S-ICE.DAT is:
-
- INIT = "WIN; WR; WD 1; WC 12; ALTKEY CTRL X;"
-
- This example will put the Soft-ICE window in full screen mode, create
- a register window, create a data window one line long, create a code
- window 12 lines long, and change the hot key sequence to CTRL X.
-
- Sample S-ICE.DAT : A sample S-ICE.DAT initialization file is included
- on the distribution diskette. This sample assigns the function keys so
- they are used in a similar manner as the function keys in Microsoft's
- CodeView debugger. This sample S-ICE.DAT should also be used as is for
- the tutorial in chapter 3.
-