************************************************************************
**                User's Manual for the ATAPI Device Driver           **
**                                                                    **
**                         ATAPI MO Device Driver                     **
**                                for DOS                             **
**                                                                    **
**                    MODISKAP.SYS    Version 1.85                    **
**                                                                    **
**                                           (Revised: June 25, 1999) **
************************************************************************
     All Rights Reserved, Copyright (C) FUJITSU LIMITED 1996-1999


Table of Contents
=================
1. Overview

2. Outline of the ATAPI MO device driver
  2.1  Operating environment (hardware)
  2.2  Operating environment (software)
  2.3  Supported physical formats of MO disks
  2.4  Supported logical formats of MO disks

3. Details of the ATAPI MO device driver
  3.1  Syntax
  3.2  Drive letter assignment

4.Trademarks


1. Overview
===========
The MO device driver supports Read/Write and disk change of ATAPI MO drives 
in the DOS environment.
This supports 512bytes/sector MO disks(540 , 230 and 128MB capacities)
and 2048bytes/sector MO disks(1.3GB and 640MB capacities)


2. Outline of the ATAPI MO device driver
========================================
2.1 Operating environment (hardware)
------------------------------------
The following hardware is necessary for the operation of this MO device 
driver:
 (1) IBM PC/AT or compatible.
 (2) ATAPI MO drive

2.2 Operating environment (software)
------------------------------------
 (1) DOS version 6 or later

2.3 Supported physical formats of MO disks
------------------------------------------
3.5-inch MO disks
  128 Mbytes total size,  512 bytes per sector
  230 Mbytes total size,  512 bytes per sector
  540 Mbytes total size,  512 bytes per sector
  640 Mbytes total size, 2048 bytes per sector
  1.3 Gbytes total size, 2048 bytes per sector

2.4  Supported logical formats of MO disks
------------------------------------------
(1) Volume format 
The MO device driver automatically detects the following two types of 
format type and assigns logical drive letters (such as D: or E:).

(a) Floppy type
  A standard MO format type used with MS-DOS. 
  The entire disk is handled as one logical drive. 
  This format type is generally called the IBM format type.

(b) Hard Disk type
  A format type used with hard disks for PC/AT compatibles. 

[Note]
The MO device driver assumes an unformatted MO disk if the MO disk is 
in any other format or has no valid partition.

(2) File format in each partition (file system)
FAT (file allocation table)

The FAT file system is used by DOS, and is supported by Windows 9x, 
Windows NT, and OS/2.


3.  Details of the ATAPI Device Driver
======================================
3.1  Syntax
-----------
Register the device driver in the CONFIG.SYS file as described below. 
The description is not case-sensitive.

DEVICE=(path)\MODISKAP.SYS [/P][/Ii][/Rr]
or
DEVICEHIGH=(path)\MODISKAP.SYS [/P][/Ii][/Rr]

 /P   Pause option
      Pauses screen messages after the MO device driver is initialized 
      during the computer starting process.
      Pressing any key continues the operation.
      Specify this option in order to check the message displayed by the 
      MO device driver.

 /Ii  Device number option
      Only the MO drive connected to port i is mounted.
      Where i is defined as:
         1 = Primary Master
         2 = Primary Slave
         3 = Secondary Master
         4 = Secondary Slave

      If this option is not specified, all ports are scanned.
      Therefore, this option need not be specified usually.

 /Rr  Reserved drive option
      Specify the number of reserved logical drive letters (r=1 to 10).
      If this option is not specified, one drive letter is reserved.
      The number of reserved drive letters (r) is independent of the number
      of disk partitions.


3.2  Drive letter assignment
----------------------------
(1) If the MO disk inserted upon starting the computer has more partitions than 
  the number specified with the /R option, as many drive letters as the number 
  of partitions are assigned to the MO drive.

  For example, if the /R2 option is specified in CONFIG.SYS and the computer 
  is started with a three-partition MO disk, three drive letters are assigned 
  to the MO drive.

(2) If a MO disk inserted in the MO drive has more partitions than the number of 
  drive letters assigned to the MO drive, the MO device driver can access only as 
  many partitions as the number of drive letters assigned to the MO drive.

  For example, assume that two drive letters are assigned to the MO drive.
  If the MO disk with three-partitions is inserted, the MO device driver cannot 
  access the third partition.

(3) If a MO disk inserted in the MO drive has fewer partitions than the number 
  of drive letters assigned to that drive, an error occurs when the MO device 
  driver attempts to access the excess drive letter.

  For example, if two drive letters (D: and E:) are assigned to the MO drive.
  Then a single-partition MO disk is inserted, the driver can access that MO disk 
  using drive letter D:. However, if an attempt is made to access the disk 
  using drive letter E:, an error occurs and the "Invalid disk type" 
  message is displayed.

(4) Maximum number of drive letters
    This MO device driver assigns drive letters up to Y:. 
    If the number of drive letters specified with the /R option exceeds Y:, 
    the MO device driver assigns drive letters up to Y:. 
    Similarly, if a MO disk with more partitions than Y: is inserted when 
    the computer is started, the MO device driver assigns drive letters up to Y: 
    and ignores the rest of the partitions.

(5) Lastdrive specification
    The Lastdrive specification (LASTDRIVE=*) in CONFIG.SYS does not affect 
    the drive letter assignment of the MO drive.
    For example, if LASTDRIVE=H: is specified, drive letters I: and later 
    can be assigned by specifying a large value for the /R option.

(6) Drive letters for CD-ROM drives
    If this MO device driver assigns a later drive letter than the drive letter 
    specified by LASTDRIVE=* (default is E:) in CONFIG.SYS, no drive 
    letter can be assigned to a CD-ROM drive. 
    In such a case, the CD-ROM drive cannot be accessed. 
    To solve this problem, increase the value specified for LASTDRIVE=.


4. Trademarks
=============
No part of this package may be reproduced in any form or by any means.
MS-DOS is a registered trademark of Microsoft Corporation.
Other company names and product names are registered trademarks or trademarks
of their respective companies.
