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                            Table of Contents


1.   Installing PowerSCSI!
2.   Setup Optimization
3.   Introduction to PowerSCSI!
3.1  Keyboard and Mouse Support
4.   Introduction to SCSI
4.1  SCSI Controller
4.2  SCSI Bus
4.3  SCSI Device Types
4.4  SCSI ID
4.5  SCSI Logical Unit Number (LUN)
4.6  SCSI Termination
4.7  Terminating a SCSI bus with external devices only
4.8  Terminating a SCSI bus with internal devices only
4.9  Terminating a SCSI bus with internal and external devices
4.10 SCSI Disconnect/Reconnect
5.   Custom Installation
6.   Future/CAM 8-Bit DOS Drivers
7.   Future/CAM 16-Bit / 32-Bit PCI DOS Drivers
8.   Future/CAM 32-Bit EISA DOS Driver
9.   ASPI Manager
10.  Int 4Bh SCSI Interface Driver
11.  CD-ROM Driver
12.  Int 13h Driver
13.  PCMCIA Configuration 
14.  SCSI2GO PCMCIA Auto-Configuration
15.  SCSI2GO PCMCIA Device Auto-Configuration
16.  Specifying the Target Directory
17.  Missing CD-ROM Extensions
18.  Additional Feature of 16-Bit / 32-Bit PCI Drivers 
19.  IRQ Selection for 8-Bit Controllers
20.  No IRQ Selection for 8-Bit Controllers
21.  Updating and Backing up of System Files


1.   Installing PowerSCSI! 

PowerSCSI! Setup provides the user with two ways to install the drivers and 
utilities.

The Express option uses default settings to make the installation quick and 
simple. This option is recommended for less experienced computer users. The 
express option asks the user to choose between the settings "Optimize for 
Performance" or "Optimize for Memory Size". 

The Custom option provides the ability to change the default settings for 
the system. This option is intended for experienced SCSI users. 


2.   Setup Optimization

PowerSCSI! provides two ways to configure the SCSI drivers. Selecting 
"Optimized for Performance" loads drivers that provide better performance, 
but requires more system memory. To maximize free system memory, select 
"Optimized for Memory Size".

Note:  The PowerSCSI! drivers may be relocated to available upper memory 
blocks using a memory manager such as QEMM, 386MAX, MEMMAKER, and RAMSETUP.


3.   Introduction to PowerSCSI!

PowerSCSI! is a universal application interface developed by Future Domain 
that allows applications to work seamlessly with most SCSI peripherals. 
PowerSCSI! can be thought of as "middleware" because it functions between 
the application software and the SCSI device. PowerSCSI! controls SCSI 
peripherals through the operating system and the actual hardware consisting 
of the controller and cable.

Once PowerSCSI! is installed, it operates in the background, managing 
input/output (I/O) calls from application software to any number of SCSI 
peripherals, including CD-ROM, hard disk drives, magneto-optical drives, 
digital cameras, scanners, and tape drives. 

PowerSCSI! supports all the Future Domain controllers and ICs that uses any 
of the following host-bus interfaces: 

    ISA 
    MCA 
    EISA 
    PCMCIA 
    PCI 


3.1  Keyboard and Mouse Support

Mouse support is available.  To use the mouse, load the mouse driver 
included with DOS or the mouse device driver included with the system.

Keyboard support is as follows:

   Left Arrow:    Moves the active item to the left within a control group
   Right Arrow:   Moves the active item to the right within a control 
                  group
   Tab Left:      Moves the active item to the left within a control 
                  group, or to a previous control group 
   Tab Right:     Moves the active item to the right within a control 
                  group, or to a the next control group
   Enter Key:     Selects active item
   

4.   Introduction to SCSI

SCSI (Small Computer System Interface) is an intelligent interface that 
allows computers to communicate with various types of devices. A SCSI 
system is composed of a SCSI controller, a SCSI bus, one or more SCSI 
devices located at different IDs, and termination.


4.1  SCSI Controller 

The SCSI controller can be an ISA, MCA, EISA, PCI, or PCMCIA card that fits 
into a slot in the computer. It provides the SCSI interface between the 
computer and the SCSI devices. SCSI may also be provided on a system 
motherboard, in which case a connector is provided to attach SCSI devices 
to the system. 


4.2  SCSI Bus

A SCSI bus is an electrical interface that connects SCSI devices with a 
SCSI controller. 


4.3  SCSI Device Types

SCSI supports a wide variety of devices which include hard disks, tape 
drives, printers, processors, WORMs, CD-ROMs, scanners, medium-changers 
(jukeboxes), magneto-optical devices, and communication devices.


4.4  SCSI ID

A SCSI bus can support up to eight devices. Each device on the SCSI bus is 
addressed by a unique number between zero and seven, called the SCSI (or 
Target) ID. The Future Domain SCSI controller is located at SCSI ID 7, 
leaving IDs ranging from zero to six free. 


4.5  SCSI Logical Unit Number (LUN)

Each SCSI ID may have up to 8 devices. These devices are addressed by their 
Logical Unit Number (LUN). Typically only one device is present at each ID, 
and is assigned a logical unit number of 0.


4.6  SCSI Termination

For SCSI to work properly, the SCSI bus must be terminated. To terminate a 
SCSI bus, you must put terminating resistors at each end of the bus. A bus 
may have three configurations: external devices only, internal devices 
only, or external and internal devices. 


4.7  Terminating a SCSI bus with external devices only

Termination must be supplied on the last external device on the chain, and 
on the SCSI controller. 


4.8  Terminating a SCSI bus with internal devices only

Termination must be supplied to the last device on the chain, and on the 
SCSI controller. 


4.9  Terminating a SCSI bus with internal and external devices

Termination must be supplied to the last internal device on the internal 
chain, and to the last external device on the external chain. Also, 
termination on the SCSI controller must be removed.


4.10 SCSI Disconnect / Reconnect

Not all SCSI transactions can be processed immediately. For example, 
rewinding a tape or scanning a document can take a long time, as can 
seeking to a sector on a CD-ROM or hard disk. These operations can tie up 
the CPU unnecessarily while waiting for the device to complete the task. In 
these cases, the SCSI specification has defined a way for a device to 
disconnect from the SCSI bus, thus freeing the SCSI bus for other SCSI 
transactions or freeing the CPU from being tied to the SCSI bus waiting for 
the operation to complete.

When the disconnected device completes its operation it can reconnect to 
the bus, causing a hardware interrupt. When this interrupt occurs, control 
is returned back to that SCSI operation, which then completes. 

The disconnect/reconnect mechanism provides overlapped I/O functionality by 
allowing multiple outstanding SCSI requests with different devices to be in 
process at the same time.


5.   Custom Installation 

The Custom Setup provides the advanced computer user more control over the 
PowerSCSI! installation.

Select the box next to the option to be installed. The "More" buttons will 
open the configuration screens that provide further customization. 


DOS Future/CAM(TM) Drivers 

The DOS Future/CAM drivers provide a SCSI CAM (Common Access Method) 
interface to all Future Domain controllers under DOS. 


Hard Disk Support

Hard disk support is normally provided by the ROM BIOS that comes with the 
Future Domain controller. PowerSCSI! provides drivers that improve hard 
disk performance under DOS and Windows. 


SCSI Interface Support 

PowerSCSI! supports most SCSI third party applications by providing support 
for the various SCSI interfaces available today. 


6.   Future/CAM 8-Bit DOS Drivers

PowerSCSI!'s Future/CAM drivers manage all SCSI transactions on the SCSI 
bus. All SCSI I/O requests made by the applications are processed by 
Future/CAM. These drivers provide the CAM interface support for all 
controllers based on the 950/9C50 ICs, which include the following Future 
Domain controllers: 

    TMC-850M 
    TMC-850MER 
    TMC-850MEX 
    TMC-860M 
    TMC-885M 

Multitasking 8-Bit Future/CAM Driver 

The multitasking version (DCAM950.EXE) provides full CAM support which 
includes the SCSI device disconnect/reconnect feature and the queuing of 
CAM commands. This driver provides the best performance for most 
configurations.

To manually configure this driver in the CONFIG.SYS file, use the following 
syntax: 

DEVICE=[drive:][path]DCAM950.EXE /<Memory_Address> <IRQ> [/<Memory_Address> 
<IRQ>]

Where:

For each 8-bit controller supported, command line parameters are required 
which specify Memory Address and IRQ. Each 8-bit controller installed must 
have a unique Memory Address/IRQ.

    <Memory_Address>    (C800, CA00, CE00, DE00, E800, 
                    or EC00).  
    <IRQ>           IRQ (3, 4, 5, 10, 11, 12, 14, or 15) 

Example: 

    DEVICE=C:\PWRSCSI!\DCAM950.EXE /CA00 5 

Note: The TMC-850M/MER/MEX only support IRQ 3 and 5. The other IRQ 
selections are for older 950 based controllers (TMC-860M and TMC-885M). 


Singletasking 8-Bit Future/CAM Driver 

The singletasking version (MCAM950.SYS) provides all the CAM functionality 
except it does not support SCSI device disconnect/reconnect and all CAM 
commands are processed serially.

To manually configure this driver in the CONFIG.SYS file, use the following 
syntax: 

DEVICE=[drive:][path]MCAM950.SYS

Parameters: None 

Example: 

    DEVICE=C:\PWRSCSI!\MCAM950.SYS 


7.   Future/CAM 16-Bit / 32-Bit PCI DOS Drivers

PowerSCSI!'s Future/CAM drivers manage all SCSI transactions on the SCSI 
bus. All SCSI I/O requests made by the applications are processed by 
Future/CAM. These drivers provide the CAM interface support for all 
controllers based on the 1800/18C50/18C30/36C70 ICs, which include the 
following Future Domain controllers: 

    TMC-1650 
    TMC-1660 
    TMC-1670 
    TMC-1680 
    TMC-1610M 
    TMC-1610MER 
    TMC-1610MEX 
    MCS-600/700 
    TMC-3260 
    SCSI2GO PCMCIA Card 


Multitasking 16-Bit / 32-Bit PCI Driver

The multitasking version (DCAM18XX.EXE) provides full CAM support which 
includes the SCSI device disconnect/reconnect feature and the queuing of 
CAM commands. This driver provides the best performance for most 
configurations. Though the support for the 16-bit controller and the 32-bit 
PCI controllers are both provided by the same driver, this driver 
automatically distinguishes the two types of controllers and operate in the 
best allowable data transfer mode for the controller. 

To manually configure this driver in the CONFIG.SYS file, use the following 
syntax: 

DEVICE=[drive:][path]DCAM18XX.EXE [/P:<IOPort>,<IRQ>] [/A<n>] [/16BIT:<n>] 
[/APM] [/S] [/M]

Where:

    /P      Indicates support for hot-plug controller 
            (for SCSI2GO PCMCIA card only) 
        <IOPort>    I/O Port space (140 or 170) 
        <IRQ>   IRQ (3, 5, 10, 11, 12, 14, or 15) 
    /A<n>       Sets controller n to Asynchronous negotiation 
    /16BIT:<n>  Forces 16-bit data transfer on controller n 
    /APM        Enables Advanced Power Management support
    /S      Enables Advanced Power Management device spin up/down support
    /M      Disables the display of parameter option messages


Example: 
    (Configuration for SCSI2GO PCMCIA card) 
    DEVICE=C:\PWRSCSI!\DCAM18XX.EXE /P:140,5 /APM 

    (Configuration for regular desktop system) 
    DEVICE=C:\PWRSCSI!\DCAM18XX.EXE /APM 


Singletasking 16-Bit / 32-Bit PCI Drivers 

The singletasking version (MCAM18XX.SYS) provides all the CAM functionality 
except it does not support SCSI device disconnect/reconnect and all CAM 
commands are processed serially. As with the multitasking version, this 
driver automatically distinguishes the 16-bit controllers from the 32-bit 
PCI controllers and processes SCSI commands using the best feature of each. 


DEVICE=[drive:][path]MCAM18XX.SYS [/P:<IOPort>,<IRQ>] [/A<n>] [/16BIT:<n>] 
[/APM] [/S] [/M]

To manually configure this driver in the CONFIG.SYS file, use the following 
syntax: 

Where:

    /P      Indicates support for hot-plug controller 
            (for SCSI2GO PCMCIA card only) 
        <IOPort>    I/O Port space (140 or 170) 
        <IRQ>   IRQ (3, 5, 10, 11, 12, 14, or 15) 
    /A<n>       Sets controller n to Asynchronous negotiation 
    /16BIT:<n>  Forces 16-bit data transfer on controller n  
    /APM        Enables Advanced Power Management support 
    /S      Enables Advanced Power Management device spin up/down support
    /M      Disable the display of parameter option messages

Example: 

    (Configuration for SCSI2GO PCMCIA card) 
    DEVICE=C:\PWRSCSI!\MCAM18XX.SYS /P:140,5 /APM 

    (Configuration for regular desktop system) 
    DEVICE=C:\PWRSCSI!\MCAM18XX.SYS /APM


8.    Future/CAM 32-Bit EISA DOS Driver

PowerSCSI!'s Future/CAM drivers manage all SCSI transactions on the SCSI 
bus. All SCSI I/O requests made by the applications are processed by 
Future/CAM. The 32-bit EISA DOS Future/CAM driver (DCAM7EX.EXE) provides 
the CAM interface support for the TMC-7000EX controller. Only one DOS 
driver is provided for this controller. This is a multitasking Future/CAM 
driver that provides full CAM support including the SCSI device 
disconnect/reconnect feature and the queuing of CAM commands. 

To manually configure this driver in the CONFIG.SYS file, use the following 
syntax: 

DEVICE=[drive:][path]DCAM7EX.EXE

Parameters: None.


9.   ASPI Manager

Future Domain's ASPI manager (ASPIFCAM.SYS) interfaces ASPI based drivers 
and applications to all Future Domain controllers and ICs. If the ASPI 
driver or application to be used is capable of command posting and/or 
disconnect/reconnect, turn these features on and use the multitasking DOS 
Future/CAM driver and/or Windows Future/CAM driver.

To manually configure this driver in the CONFIG.SYS file, use the following 
syntax: 

DEVICE=[drive:][path]ASPIFCAM.SYS [/D] [/O] [/M]

Where:

    /D  Enables SCSI disconnect/reconnect feature 
    /O  Enables posting of ASPI commands 
    /M  Disables the display of parameter option messages


10.  Int 4Bh SCSI Interface Driver

Future Domain's Int 4Bh interface driver (INT4BCAM.SYS) interfaces 
interrupt 4Bh based drivers and applications to all Future Domain 
controllers and ICs. 

To manually configure this driver in the CONFIG.SYS file use the following 
syntax: 

DEVICE=[drive:][path]INT4BCAM.SYS


11.  CD-ROM Driver

PowerSCSI!'s CD-ROM driver (FDCD.SYS) supports CD-ROM Data, Audio, 
Photo-CD, CD-XA, and CD-I Digital Video for SCSI-1 and SCSI-2 CD-ROM 
devices. This driver supports up to a maximum of 24 SCSI CD-ROM devices, 
only limited by the available drive letters in DOS/Windows.

To enable CD-ROM support, FDCD.SYS must be loaded in the CONFIG.SYS and the 
CD-ROM Extensions must be loaded in the AUTOEXEC.BAT file. To manually 
configure the CD-ROM driver in CONFIG.SYS, use the following syntax: 

DEVICE=[drive:][path]FDCD.SYS [/D:MSCD0001] [/R] [/Z] [/L] 
[/P:<HBA>,<ID>:<DriveCount>] [/T] [/M]

Where:

    /D:????????     Identification string to CD-ROM Extensions 
    /R      Forces SCSI bus reset upon driver initialization 
    /Z      Displays drive size 
    /L      Indicates support for one hot-plug drive 
            (for SCSI2GO PCMCIA card only) 
    /P      Indicates support for hot-plug drive(s)
            (for SCSI2GO PCMCIA card only) 
        <HBA>   Identifies the path (controller) number (0 thru 3) 
        <ID>    Identifies the Target ID (0 thru 6) 
        <DriveCount>  Number of drive letters to allocate 
    /T      Force the use of the proprietary Future Domain OEM Toolkit 
interface.
    /M      Disables the display of parameter option messages 

Note 1:  The /L parameter and the /P parameter are mutually exclusive.

Note 2:  If the system is attached to a network, add the LASTDRIVE 
statement in the CONFIG.SYS file. For example, if the last drive letter 
allocated is drive E, add 

    LASTDRIVE=E 

to the CONFIG.SYS file. In this case, network drive letters will be added 
starting at drive F.

Note 3:  The CD-ROM Extensions program is required to allow DOS/Windows to 
assign a drive letter and to access the CD-ROM. 

Example: 
    (Configuration for SCSI2GO PCMCIA card) 
    DEVICE=C:\PWRSCSI!\FDCD.SYS /D:MSCD0001 /P:0,5:1 

    (Configuration for regular desktop system) 
    DEVICE=C:\PWRSCSI!\FDCD.SYS /D:MSCD0001


12.  Int 13h Driver

PowerSCSI!'s Int 13h driver for DOS (FDBIOS.SYS) provides SCSI hard disk 
service under DOS v5.0 and later. This driver provides both IOCTL and Int 
13h support for hard disk.

To manually configure this driver in the CONFIG.SYS file, use the following 
syntax: 

DEVICE=[drive:][path]FDBIOS.SYS [/L] [/P:<HBA>,<ID>:<DriveCount>[,P]] [/M] 

Where:

    /L      Indicates support for one hot-plug drive
            (for SCSI2GO PCMCIA card only) 
    /P      Indicates support for hot-plug drive(s) 
            (for SCSI2GO PCMCIA card only) 
        <HBA>   Identifies the path (controller) number (0 thru 3) 
        <ID>    Identifies the Target ID (0 thru 6) 
        <DriveCount> Number of drive letters to allocate 
        [,P]        Indicates whether a primary partition is present 
    /M      Disables the display of parameter option messages 

Note:  The /L parameter and the /P parameter are mutually exclusive

Example: 
    (Configuration for SCSI2GO PCMCIA card) 
    DEVICE=C:\PWRSCSI!\FDBIOS.SYS /P:0,5:1,P 

    (Configuration for regular desktop system) 
    DEVICE=C:\PWRSCSI!\FDBIOS.SYS


13.  PCMCIA Configuration

Setup detects the number of SCSI2GO PCMCIA card(s) supported on the system. 
It also sets the default I/O Port and IRQ system resources for each card. 
To change any of the settings, click on the down arrow next to the setting 
and select a new value. 

The "Force 16-Bit I/O" option is only used for the IBM 720 Notebook. 

To modify the auto-configuration of SCSI devices, click on the "Settings.." 
button. 


SCSI2GO PCMCIA Client Driver 

PowerSCSI!'s client driver (FDCLIENT.SYS) provides support for the SCSI2GO 
PCMCIA card. It acts as a client driver for Card and Socket services. It is 
responsible for allocating/de-allocating hardware resources (IRQs and I/O 
port space) when the SCSI2GO PCMCIA card is inserted or ejected. The 
command line parameters to configure FDCLIENT.SYS in the CONFIG.SYS file 
are as follows:

DEVICE=FDCLIENT.SYS /S<n>:<IOPort>,<IRQ> [/S<n>:<IOPort>,<IRQ>] 

Where: 
    /S<n>       PCMCIA slot number n (0-based)  
    <IOPort>    I/O Port space (140 or 170)  
    <IRQ>       IRQ (3, 5, 10, 11, 12, 14, or 15)  

Note:  Hardware settings (both I/O port space and IRQ) must not conflict 
with any existing hardware.

Example: 
    DEVICE=C:\PWRSCSI!\FDCLIENT.SYS /S0:140,5 


14.  SCSI2GO PCMCIA Auto-Configuration

PowerSCSI! provides SCSI2GO PCMCIA card users the ability to auto-configure 
SCSI devices without rebooting. Auto-Configuration allows the addition and 
removal of SCSI devices attached to the SCSI2GO card at anytime while the 
machine is running. Due to the constraints imposed by the electrical 
signals on the SCSI bus, modification to the configuration can only be made 
if the SCSI2GO card is not plugged in the PCMCIA slot. After changing the 
device configuration, the SCSI2GO card can be safely inserted into the 
PCMCIA slot and PowerSCSI! will automatically detect the new configuration 
without the need to reboot. 

Default Auto-Configuration Support

If Setup detected no SCSI2GO PCMCIA card or no SCSI device, the default 
configuration includes support for one CD-ROM and one hard disk. To change 
this support, select the Custom option to configure the system as required. 


15.  SCSI2GO PCMCIA Device Auto-Configuration

PowerSCSI! provides the capability for auto-configuration of SCSI devices. 
If Setup detected SCSI devices connected to the SCSI2GO PCMCIA card, the 
device information will be displayed. To configure additional devices for 
auto-configuration, select the desired SCSI ID and provide the necessary 
information for the device. This will allow the addition of the specified 
device in the future without executing the PowerSCSI! setup again.


SCSI Device ID 

The SCSI ID of the device on the system. To add/remove a device, 
select/de-select the box next to the desired ID. 

Note: If Setup detected a device that is not a CD-ROM nor a hard disk on a 
SCSI ID, the SCSI ID box cannot be modified. 


Device Type

The device type can be either a hard disk or CD-ROM. 


Number of Drive Letters to Allocate

This is the number of drive letter(s) that DOS requires for the device. 
This number is usually one for CD-ROMs. For hard disks, this is the number 
of partitions on the drive. 


Primary Partition Exist?

This is only used for hard disks. If there is a primary partition on the 
hard disk, click on the box next to the word "YES". 


16.  Specifying the Target Directory 

PowerSCSI! Setup needs to know where to copy the drivers and utilities on 
the hard disk. The default directory is C:\PWRSCSI!. To have the PowerSCSI! 
drivers and utilities copied to a different directory, type the new path in 
the box and click "OK". If the path specified does not exist, Setup will 
create it.


17.  Missing CD-ROM Extensions 

Support for CD-ROM devices requires the CD-ROM Extensions. One version of 
the CD-ROM Extensions is called MSCDEX.EXE.  It is distributed with DOS 
v6.X and later. A similar version from Corel is called CORELCDX.COM. Either 
one of these programs can be used to provide full CD-ROM support for the 
system. 


18.  Additional Features of 16-Bit / 32-Bit PCI Drivers

Force Asynchronous Data Transfer Mode 

The 16-Bit / 32-Bit PCI Future/CAM drivers (DCAM18XX.EXE, MCAM18XX.SYS, and 
V18FCAMD.386) support SCSI asynchronous, synchronous and fast synchronous 
data transfers. The data transfer mode is determined when the controller 
negotiates with the SCSI device for its supported data transfer mode. 

Unfortunately, there are some devices that may negotiate for synchronous or 
fast synchronous data transfer mode, but does not behave well during actual 
data transfer. If this situation occurs, the user has to force the 
asynchronous data transfer mode on that controller. The controller number 
(0, 1, 2, or 3) refers to the number assigned by the Future/CAM driver.


Advanced Power Management (APM) Support 

Advanced Power Management is a feature supported by most portable systems 
(laptops, notebooks, etc..) and some "Green PC" machines. This feature is 
now supported in PowerSCSI! and can be enabled and disabled as desired. The 
user may also allow the spin up/down of devices when the system goes to APM 
mode.


19.  IRQ Selection for 8-Bit Controllers

PowerSCSI! Setup has detected one (or more) 8-bit controller(s) on the 
system. The multitasking DOS and Windows Future/CAM drivers require the IRQ 
setting used by each 8-bit controller found in the system. Provide the 
hardware IRQ used by each 8-bit controller found (distinguished by the 
controller's memory address) by selecting the radio button corresponding to 
the IRQ number.

Note:  Each 8-bit controller must have a unique IRQ setting. The IRQ 
setting is determined by the jumpers that are located on the controller. If 
needed, refer to the controller's user's manual on how to set the jumpers. 


20.   No IRQ Selection for 8-Bit Controllers

The multitasking DOS Future/CAM driver (DCAM950.EXE) and Windows Future/CAM 
driver (V9FCAMD.386) require the use of a hardware IRQ to support advanced 
features like disconnect/reconnect and queuing of CAM commands. 

If there is no available IRQ on the system, Setup can configure the system 
to use the singletasking version of the DOS driver (MCAM950.SYS) and 
disable the Windows driver support. In addition, the advanced features on 
Future Domain's ASPI manager (ASPIFCAM.SYS), such as SCSI 
disconnect/reconnect and ASPI command posting, will be disabled. 


21.  Updating and Backing up of System Files 

PowerSCSI! Setup will update the appropriate system files (CONFIG.SYS, 
AUTOEXEC.BAT, and SYSTEM.INI) with the necessary changes for the user. 

Copies of the old system files will be saved using the same file names but 
with the incrementing number in the extension (i.e. CONFIG.$01, 
AUTOEXEC.$01, and SYSTEM.$01). These backup files may be renamed by typing 
the new names in the appropriate boxes. 

To choose not to have PowerSCSI! Setup update a system file, deselect the 
appropriate "Update" box 


Multiple Configuration System Files 

PowerSCSI! Setup handles multiple configuration system files created under 
MS-DOS v6.0 and later in a different way. The multiple configuration system 
files (CONFIG.SYS and AUTOEXEC.BAT) allow users to create multiple ways of 
configuring how the operating system starts up. PowerSCSI! Setup cannot 
presume how the user wants to configure the operating system's start-up and 
will not update the files. However, the modifications that are required to 
enable the PowerSCSI! drivers will be saved in files (with the .MCF 
extension) which may be used to update the multiple configuration system 
files.