AST Advantage! 6066d  (250-0404/412)  External Floppy   Faxback Doc. # 3540
                                          Drive

Adding the 5.25" External Floppy Drive 250-1087

1.  There are two procedures which can be used to install the 250-1087.

    A.  (preferred) Uses the new version of EXTSETUP.COM.  Installs the 
        external floppy drive as B:.

    B.  Uses the original version of EXTSETUP.COM .  Installs the external
        floppy as drive D:.

2.  The latest version of EXTSETUP.COM has a file size of 53,612 and is
    dated 07-12-93 2:09p.  This driver properly installs the external
    floppy as drive B:.

    A.  Run EXTSETUP.COM from the floppy disk.  The following files are
        added to the root directory of the hard drive:

        EXTDRVR.SYS
        EXTFMT.COM
        EXTDRIVE.COM
        BACKFMT.COM

    B.  The following line is added to the end of the CONFIG.SYS file:

        DEVICE=C:\EXTDRVR.SYS B:

        The external floppy can be used as drive B:  unless a second
        floppy drive is already installed.

NOTE:  It is not necessary to change the CMOS setup for the external
       floppy drive, as it is not controlled by the floppy drive
       controller.

3.  Install using original version of EXTSETUP.COM.

There is a drive designation conflict when the 250-1087 is added to the
Sensation II using the original driver.  The specific problem is that the
external floppy drive, when installed, will be configured as drive D: 
moving the CD-ROM to drive E:

The reason for this is that the external floppy drive's drivers are loaded
in the CONFIG.SYS file.  there is no option to designate which drive
letter will be used by the external floppy drive.  The CD-ROM driver,
loaded in the AUTOEXEC.BAT file, will check all drive designations and
configure the CD-ROM drive for the next available drive letter, which is
E:.

The external floppy as drive D: and the CD-ROM as drive E: will cause
problems with the WinMate software, as some of the WinMate applications
expect the CD-ROM drive to be drive D:.

NOTE:  If you with the CD-ROM drive to be E:, see section 4 b.  This
       procedure allows the software to access the CD-ROM as drive E:.

Run EXTSETUP.COM from the floppy disk included with the 250-1087.  The
following files are added to the root directory of the hard drive:

    EXTDRVR.SYS
    EXTFMT.COM
    EXTDRIVE.COM
    BACKFMT.COM

The following line is added to the end of the CONFIG.SYS file:

    DEVICE=C:\EXTDRVR.SYS

The external drive will be drive D: because its driver is loaded in the
CONFIG.SYS file.  The MSCDEX.EXE file, which activates the CD-ROM, is
loaded later in the AUTOEXEC.BAT file.

The CD-ROM is no drive E:.

Some of the software is hard-coded to look to drive D: for the CD-ROM.

There are 2 work-arounds to resolve the drive conflict issue.  The first
(preferred) uses the file DEV.COM to load the external floppy's driver in
the AUTOEXEC.BAT file.

The second uses the ASSIGN command to reassign the drive letters.

The following steps describe the work-around using DEV.COM.

1.  Copy DEV.COM from the floppy disk to the directory containing the
    external floppy's files.

    Example:  COPY A:DEV.COM C:\ <ENTER>

2.  Edit the CONFIG.SYS file and remove the line that reads:

    DEVICE=C:\EXTDRVR.SYS

3.  Edit the AUDOEXEC.BAT file and add the following line directly above
    the line "if exist c:\windows\win.com c:\windows\win.com":

NOTE:  The DEV.COM line must be loaded after all loadhigh command lines. 
       Adding the DEV.COM line prior to any "loadhigh" statements will
       cause the CPU to lock up.

4.  Reboot the computer and verify that the external floppy is now drive
    E: and the CD ROM drive is still D:

The following steps describe the work-around using the ASSIGN command.

1.  Add the following line to the AUTOEXEC.BAT file, right after the path
    statement.

2.  Verify that the drive re-assignment has worked by typing:

    ASSIGN \S <ENTER>

    You should see the following:

      Original D:  set to E:
      Original E:  set to D:

NOTE:  In Windows     File Manager, the drive icons will not correctly
       indicate the type of drive being accessed.  the affected icons are:

       Drive D:  which is a CD-ROM will have a hard drive icon.
       Drive E:  which is a 5.25" floppy will have a CD-ROM icon.

This method should only be used as a temporary work-around until the
latest EXTSETUP.COM is obtained.  Before installing the new drivers,
appropriate line from the CONFIG.SYS or AUTOEXEC.BAT file.

Special Note:  If DoubleSpace has been installed, the original driver will
               work fine with no work-arounds if DBLSPACE.SYS is loaded
               before EXTDRVR.SYS file.

               The external floppy will assume the next available drive
               letter (drive I:) after the DoubleSpace host drive, which
               is drive H: by default.

(JJS&RL/tmc-03/31/95)