我在网上搜索了一下，未查到wrapper.sys，只有一篇和btcon.sys相关的，内容如下（只可惜是E文的！网址
http://home.flash.net/~hoselton/pubs/mah_002.txt）：
BOOTCON PREVENTS RECONFIGURATION CATASTROPHE
The certain way to work around this difficulty is to prepare a boot floppy
diskette in advance of any work on CONFIG.SYS. Then, if a fatal CONFIG.SYS
error occurs, rebooting with the boot floppy in the A: drive will get the
system working again. Every PC user should have a boot floppy available in
the event of a total catastrophe. Booting from a boot floppy makes testing
CONFIG.SYS an excruciatingly tedious process, however. Now there is a better
way. BOOTCON is the answer.
This month's report introduces BOOTCON, a utility that can switch among 26
different user defined configurations on the fly during the boot process.
BOOTCON supplements rather than replaces the MBOOT utility introduced last
month. Both utilities let the user make a selection from a menu at boot-up.
MBOOT provides a selection among operating systems and BOOTCON provides a
selection among groups of device drivers and system configuration parameters.
It is even possible to use both utilities on one system at the same time.
I currently use BOOTCON by itself since I only need one operating system, DOS
6.0. BOOTCON provides a safe and easy way to select different configurations
at boot-up. It completely eliminates any need to swap pairs of CONFIG.SYS and
AUTOEXEC.BAT files. It almost, but not quite, eliminates the need to keep a
boot floppy.
Best of all, BOOTCON virtually removes fatal crash worries while experimenting
with different combinations of device drivers and system parameters. As long
as one of the user defined configurations in BOOTCON works properly, the
system can always be rebooted by selecting a working configuration from the
BOOTCON menu. After successfully booting the PC, the user can edit the
CONFIG.SYS file and try again.
BOOTCON is published by Modular Software Systems, 115 W. California Blvd,
Suite 113, Pasadena, CA 91105. It can be ordered from Modular Systems at
(818) 440-9104 or from The Programmers Shop at (800) 421-8006. The price is
$60. BOOTCON version 1.6 is compatible will all versions of DOS from 3.0
through 6.0.
BOOTCON has a menu driven interface. It is customizable and has context
sensitive help. It also offers password protection (except against someone
with a boot floppy to stick in the A: drive). Features of the newly released
version 1.6 include full DOS 6.0 compatibility, more customization options, a
syntax checker for CONFIG.SYS and AUTOEXEC.BAT, enhanced password protection,
and a new auto-boot utility. After it has done its work, BOOTCON shrinks down
to occupy only 176 bytes of memory.
USING BOOTCON TO CREATE A MULTIPLE CONFIGURATION CONFIG.SYS FILE
Using BOOTCON requires three steps. The first is to add the BOOTCON device
driver to the CONFIG.SYS file. Normally this command appears early in the
CONFIG.SYS file. Listing other device drivers and configuration commands
first is all right, if that is necessary or convenient. Adding BOOTCON to
CONFIG.SYS requires typing in the following line.
DEVICE=C:\BOOTCON\BOOTCON.SYS
This assumes that BOOTCON.SYS is in the BOOTCON directory on drive C:.
The second step in using BOOTCON is to define up to 26 "menu definition
blocks" (MDBs for short) inside the CONFIG.SYS file. The MDBs appear after
the BOOTCON.SYS command in CONFIG.SYS. Each MDB begins with a line that looks
like the following example.
REM BC=
The command lines between the REM BC= execute only after making
the appropriate selection from the opening BOOTCON menu. The text that
constitutes the MDB label will appear on the BOOTCON menu and should, at the
very least, tell the user something distinctive about that selection. The
choices of text for the MDB label and of the lines within the MDB itself are
entirely up to the CONFIG.SYS author.
The third step in using BOOTCON is to add the following line at the very end
of the CONFIG.SYS file.
REM BC=
AN EXAMPLE: BOOTCON IN A REALISTIC CONFIG.SYS FILE
In reading through the example in LISTING 1, it may be helpful to recognize a
few important points as you go along.
a) DOS allows blank lines to appear anywhere in CONFIG.SYS. In the
example, they enhance readability both for this article and in the
actual file on the hard disk.
b) Under DOS versions before 4.00, MSDOS.SYS could transmit only capital
letters from the CONFIG.SYS file to BOOTCON. No matter how an MDB
label appears in the CONFIG.SYS file, the label appears to contain only
capital letters when BOOTCON displays the menu. Under DOS 6.0 both
capital and small letters display correctly.
c) No matter which MDB you select from the BOOTCON menu, CONFIG.SYS
statements that appear before, between and after the MDBs always execute .
d) One MDB, usually the first one, is the default configuration. If no
configuration is selected from the BOOTCON menu within a specified
time, BOOTCON selects the default configuration. This relieves the
user of any obligation to sit in front of the keyboard and monitor the
boot process. The BOOTCON start-up menus can change the default
configuration.
e) The MDB labels appear on the BOOTCON menu in the order in which the
MDBs appear in CONFIG.SYS. Each label will have a letter appended in
front of it. The letters from "A" through "Z" appear in order. Make menu
selections either by typing the letter that appears in front of the label
for the required configuration or by moving the cursor to that label and
pressing .
f) The commands BREAK, BUFFERS, FCBS, FILES, LASTDRIVE, STACKS and SWITCHES
can execute more than one time in a single CONFIG.SYS file. Only the last
executed version of each command has an effect on the final configuration.
The default value for these commands should appear at the beginning of
CONFIG.SYS, before the first MDB. Then any MDB that requires a non-default
value can include its own revised value for any particular configuration
parameter. MDBs that use the default values do not need to include any of
these configuration commands.
g) Finally, the DOS= command represents a new type of DOS command.
This particular command should only appear once in any CONFIG.SYS
file. MSDOS.SYS will find this command even if it is in one of the
MDBs not selected from the BOOTCON menu. The best way to handle this
situation is to include the DOS=HIGH (or DOS=HIGH,UMB) command
near the beginning of CONFIG.SYS. DOS will then load itself HIGH
whenever it can. If CONFIG.SYS does not install a memory manager, DOS will
load low. BOOTCON includes a special syntax convention to override the
DOS= statement inside specific MDBs.
A simplified version of a real CONFIG.SYS file containing BOOTCON and several
MDBs might look like LISTING 1.
===========================================================================
LISTING 1 - Sample CONFIG.SYS file
1 DEVICE=C:\QEMM\HOOKROM.SYS
2
3 DOS=HIGH
4 BREAK=ON
5 BUFFERS=35
6 FILES=25
7 LASTDRIVE=P
8 STACKS 0,0
9 SWITCHES=/K
10
11 DEVICE=C:\BOOTCON\BOOTCON.SYS
12
13 REM BC=
19
20 REM BC=
25
26 REM BC=
32
33 REM BC=
35 DEVICE=C:\DOS_620\HIMEM.SYS
36 DEVICE=C:\DOS_620\SETVER.EXE
37 REM BC=]
38
39 SHELL=C:\COMMAND.COM /P /E:656
40
41 REM BC =
===========================================================================
There will be more to say in later articles about the specific commands in
LISTING 1. For now the emphasis is on BOOTCON and its capabilities.
The following is a summary of what each statement or group of statements in
the CONFIG.SYS file in LISTING 1 accomplishes.
Line 1: Loads the HOOKROM.SYS device driver. QEMM386 requires
HOOKROM.SYS when it is not the first device driver in CONFIG.SYS.
HOOKROM.SYS does not interfere with 386MAX or HIMEM drivers.
Line 3: Instructs DOS 6.0 to load itself into the high memory area.
This command should appear early in the file. Even BOOTCON
cannot prevent DOS from finding it. It does no good to
include it in one of the "menu definition blocks." Include
this line one time in CONFIG.SYS to be sure that DOS will load
HIGH if a suitable memory manager is in the selected MDB.
Lines 4-9: Typical CONFIG.SYS statements; they do not effect BOOTCON,
BOOTCON does not effect them. They will execute no matter
which MDB is selected from the BOOTCON menu. Commands in
particular MDBs may override some of these. BOOTCON
cannot protect against fatal errors that appear outside of one
of the MDBs. Edit these lines with great care. Rebooting the
system may require a boot floppy if there is an error in one
of these lines.
Line 11: Installs the BOOTCON.SYS driver.
Line 13: Start of the first MDB; includes first MDB label.
Lines 14-17: Will be executed if the first MDB is selected from the menu.
Line 18: End of the first MDB.
Line 20: Start of the second MDB; includes the second MDB label.
Lines 21-23: Will be executed if the second MDB is selected from the menu.
Line 24: End of the second MDB.
Line 26 Start of the third MDB; includes the third MDB label.
Lines 27-28: Override the BUFFERS and FILES commands at the beginning of the
CONFIG.SYS file if the third MDB is selected from the menu.
Lines 29-30: Will be executed if the third MDB is selected from the menu.
Line 31: End of the third MDB.
Line 33: Start of the fourth MDB; includes the fourth MDB label.
Line 34: Overrides the DOS=HIGH command at the beginning of CONFIG.SYS
if the fourth MDB is selected from the menu. This is a special
BOOTCON syntax.
Lines 35-36: Will be executed if the fourth MDB is selected from the menu.
Line 37: End of the fourth MDB.
Line 39: This SHELL command makes COMMAND.COM the primary command
processor and increases the primary DOS environment to 656 bytes.
Edit this line carefully. A boot floppy may be required to
reboot the PC if there is an error in this line.
Line 41: Marks the last line in the CONFIG.SYS file. It is required by
BOOTCON.
DOS starts processing this CONFIG.SYS file and eventually gets around to
loading and executing BOOTCON. BOOTCON reads the entire CONFIG.SYS file and
presents a four item Start-up Menu as shown in LISTING 2.
===========================================================================
LISTING 2 - BOOTCON Start-up Menu
=============================================================
| Select A Configuration... F1=Help |
=============================================================
| A - DOS 6.0 w/QEMM386, ANSI and DOS=HIGH |
| B - DOS 6.0 w/386MAX, ANSI and DOS=HIGH |
| C - DOS 5 w/HIMEM w/DOS HIGH |
| D - DOS 5 w/HIMEM w/DOS LOW |
=============================================================
=================================================
| Auto Select Countdown... 9 Seconds Remain |
| |
| Press to abort Auto Select, |
| or any other key to continue... |
=================================================
===========================================================================
The BOOTCON menu can display up to 15 selections on one page. If the
CONFIG.SYS file defines more than 15 MDBs, BOOTCON allows the user to access
the extra MDBs by their prefix letter or by scrolling down through the list
with the cursor.
Pressing the F1 key while the BOOTCON menu is active, resets and freezes the
Auto Select timer and displays the BOOTCON Help Menu shown in LISTING 3.
===========================================================================
LISTING 3 - BOOTCON Help Menu
========================BOOTCON Help===========================
| Move the highlighted selection bar to the boot option you |
| want to use and press , or press the letter next to |
| the option you want to select. Press if you don't |
| want any of the options. |
| |
| Other options are: |
| F1 - Display this help window |
| F2 - Display system information |
| F3 - Program Configuration Menu |
| F9 - View the CONFIG.SYS file |
| F10 - View the AUTOEXEC.BAT file |
| ESC - Exit the program |
| |
| Press any key to continue... |
===============================================================
===========================================================================
Exiting from the BOOTCON Help menu and pressing F3 displays the BOOTCON
Configuration Menu shown in LISTING 4.
==========================================================================
LISTING 4 - BOOTCON Configuration Menu
==Program Configuration==
| |
| BOOTCON Customization |
| Advanced Options |
| Set System Password |
| Set Advanced Password |
| Lose Changes and Exit |
| Save Changes and Exit |
=========================
===========================================================================
Selecting BOOTCON Customization from the Configuration Menu produces the
Customization Menu in LISTING 5.
===========================================================================
LISTING 5 - BOOTCON Customization Menu
======================BOOTCON Customization======================
| Default Menu Selection : A (A-Z, blank=last used) |
| Audio Enabled : N (y/n) |
| Phaser Count : 0 (0-9) |
| Auto Select : 15 (1-999), 0 to disable) |
| Exploding Windows : Y (y/n) |
| Remove Video Snow : Y (y/n) |
| Clear Screen on Startup : Y (y/n) |
| Maximum Vertical Menu Height : 15 (0-15 rows) |
| Maximum Horizontal Menu Width : 55 (0 or 30-74 columns) |
| |
| OK Cancel Revert Defaults |
=================================================================
===========================================================================
In LISTING 2 and LISTING 5 Auto Select indicates the count-down time in
seconds to make a selection. Moving the cursor halts the Auto Select timer.
If the Auto Select timer runs out before the user makes a selection, BOOTCON
installs the default configuration. From the BOOTCON Customization menu it is
possible to change the default configuration, control the sound effects that
alert the user to the appearance of the BOOTCON menu, control whether windows
around the menus are exploding, adjust the size of the window and adjust the
video driver for the clearest display. BOOTCON will restore the default
values as a last resort. Save any changes on the Program Configuration menu.
EFFECTS OF BOOTCON ON AUTOEXEC.BAT
Using BOOTCON does not necessarily require making any changes in the
AUTOEXEC.BAT file. Almost inevitably, however, what happens in CONFIG.SYS
determines what AUTOEXEC.BAT can do and how it should do it. For example,
installation of a memory manager may enable AUTOEXEC.BAT to load programs into
high memory. The loading syntax for these programs in AUTOEXEC.BAT is
different when loading them into high memory or low memory. The syntax
changes with each memory manager, too. Clearly, there are command lines that
AUTOEXEC.BAT should execute only when CONFIG.SYS installs a particular memory
manager. The sample menu shows BOOTCON offering to install three different
memory managers. Each has its own loading commands. AUTOEXEC.BAT must
determine which memory manager CONFIG.SYS installed and execute the
appropriate commands.
To help programmers work around these complications, BOOTCON creates a DOS
environment variable called BOOTCON. If the user chooses the second menu item
from the BOOTCON menu, BOOTCON adds the string BOOTCON=B to the DOS
environment. BFCL (Batch File Control Language) commands in AUTOEXEC.BAT can
check the value of this environment variable and chose which commands to
execute based on the current value of the BOOTCON environment variable.
Last edited by born2be on 2005-10-6 at 19:07 ]
