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READ.ME
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1993-11-12
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162 lines
Laser Magnetic Storage International
4425 ArrowsWest Drive
Colorado Springs, CO. 80907
LZ260 release 1.30 November 12, 1993
-----------------------------------------------------------------------------
Table of Contents
Section 1 List of Files
Section 2 New Features
Section 3 Buffers in host memory (the /M option)
Section 4 Details displayed with /V option (DD260 and MSCDEX)
NOTE: THE DEVICE DRIVER ON THIS DISK WILL OPERATE PROPERLY ONLY WITH
CM205 DRIVES MANUFACTURED AFTER JUNE 1, 1993
-----------------------------------------------------------------------------
Section 1 - List of Files
The files included on this disc are:
READ.ME This text file.
DD260.SYS Device driver to support the CM205, CM225, CM206, and
CM226 LMS CDROM drives with the LMS CM260 host adapter.
This device driver adheres to the Microsoft specification
for control of optical drives using personal computers
and the MS-DOS operating system. It is compatible with
Microsoft Windows 3.x. The driver requires an 80186 or
higher host processor.
MSCDEX.EXE The Microsoft CD ROM Extensions to MS-DOS, version 2.22.
SETUP.EXE A program to automatically install DD260.SYS and
MSCDEX.EXE.
USRGUIDE.TXT A text file with details on the installation process.
Files copied by Setup :
DD260.SYS
MSCDEX.EXE
-----------------------------------------------------------------------------
Section 2 - New Features
This release of the device driver software adds the following features and
problem corrections:
- Options flags added in config.sys line to allow modified operation
- Automatic configuration detection
------------------------------------------------------------------------------
Section 3 - Buffers in host memory
The CM205, CM225, CM206, and CM226 CD ROM drives are compatible with the
Multimedia PC specification. One of the requirements stated in this document
is the capability to continuously stream data from the disc to the PC, while
using less than 40% of the processor's bandwidth. This capability allows the
execution of video or animation sequences on your Multimedia PC.
In order to meet the performance targets required for MPC compliance the
CM205, CM225, CM206, and CM226 need to buffer data in the PC itself. When
installing the device driver software you have an option to select the number
of memory buffers available to the CD ROM device driver. This is the /M
option on the DEVICE line in the CONFIG.SYS file. The software installation
program will put your preference in the proper place and format. Each memory
buffer requires 2,512 bytes of the memory in your PC.
Multimedia PC compliance does specify the use of at least a 386/25MHz
processor.
It is recommended to install at least 8 memory buffers to achieve MPC
compliance. You have the option to install a total of 32 buffer sectors.
Note that performance does not always improve as more memory is allocated for
the device driver. Typically the best performance is achieved with 24 memory
buffers installed. You may have to try more than one configuration to
determine the best one for your needs, given the trade-off between
performance and memory usage. If you do not plan to run Multimedia
applications, you may consider not installing any memory buffers for the CD
ROM device driver.
The minimum number of buffer sectors the driver will use is two. If you
specify 2 or less memory buffers, the driver will allocate 2, occupying 5024
bytes of PC memory.
The maximum number of memory buffers is 32. If you specify more than 32 on
the config.sys line, the driver will reduce it to 32. If memory constraints
disallow allocation of the entire number of memory buffers requested, then
the number will be reduced to available memory.
It is recommended that the DEVICEHIGH feature of MS-DOS 5.0 and higher be
used to load the DD260 driver and its memory buffers into upper memory. See
your MS-DOS manual for instructions on how to use this feature.
Example: if you accept the suggested options in the setup program, your
CONFIG.SYS file will contain the line :
DEVICE=C:\CDROM\DD260.SYS /D:MSCD001 /P:340 /I:3 /M:8
-----------------------------------------------------------------------------
Section 4 - Details displayed with /V option
DD260 driver
When loaded with this DEVICE statement :
DEVICE=C:\CDROM\DD260.SYS /V
The DD260 driver displays something like :
LMS MSCDEX/MULTISESSION CDROM DEVICE DRIVER
VERSION 3.10 11:14:58 Apr 16 1993
CDROM DEVICE DRIVER NAME: MSCD001
Port base address: 0340
Interrupt request 0003
Memory buffers: 0002
Drive: motorized tray, max speed: 2X, fwr rev: 4
MSCDEX
When loaded with this command line :
MSCDEX /L:W /D:MSCD001 /M:16 /V
MSCDEX displays something like :
MSCDEX Version 2.21
Copyright (C) Microsoft Corp. 1986, 1987, 1988, 1989, 1990, 1992. All rights
reserved.
Drive W: = Driver MSCD001 unit 0
485456 bytes free memory
0 bytes expanded memory
12956 bytes CODE
2112 bytes static DATA
33278 bytes dynamic DATA
48608 bytes used
-----------------------------------------------------------------------------
DD260.SYS, SETUP.EXE, READ.ME
(C) Copyright 1991,1992, 1993
Laser Magnetic Storage International
MSCDEX.EXE
(C) Copyright 1986,1987,1988,1989,1990,1992
Microsoft Corporation
Unauthorized Copying is Strictly Prohibited. All Rights Reserved
MS-DOS, Windows and MSCDEX are trademarks of Microsoft Corporation