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- Laser Magnetic Storage International
- 4425 ArrowsWest Drive
- Colorado Springs, CO. 80907
-
- LZ260 release 1.00 August 4, 1993
- -----------------------------------------------------------------------------
- Table of Contents
-
- Section 1 List of Files
- Section 2 Features
- Section 3 Buffers in host memory (the /M option)
- Section 4 Details displayed with /V option (DD260 and MSCDEX)
-
-
-
- -----------------------------------------------------------------------------
-
- 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 2.21.
-
- 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 - Features
-
- This first release of the device driver software has the following features
-
- - Access to standard CD-AUDIO discs, CDROM discs, and multi-session
- Photo CD discs. Contact Eastman-Kodak for more information on the
- multi-session Photo CD discs.
-
- - Automatic speed control with the CM206 double-speed drive is
- implemented for data/audio switching. Speed is adjusted downward as
- a recovery measure on damaged disc surfaces.
-
- - When used with a CM205 or CM225, the CM260 and the DD260 device
- driver reduce processor overhead by nearly half as compared with the
- CM250 and the DD250MS device driver.
- ------------------------------------------------------------------------------
-
- 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 each of
- the CM205, CM225, CM206, 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 sector buffers.
- Note that performance does not always improve as more memory is allocated for
- the device driver. For read sizes up to 64k bytes, the best performance is
- achieved with 12 memory buffers when using a CM206 or CM226 and 24 memory
- buffers with the CM205 or CM225. You may need 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
- CDROM 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.
-
- For example, if you accept the suggested SETUP options, 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 :
-
-
- DOUBLE-SPEED CDROM DEVICE DRIVER
- VERSION 1.00: 12:33:02 Aug 4 1993
- CDROM DEVICE DRIVER NAME: MSCD001
- Port base address: 0340
- Interrupt request 0003
- Memory buffers: 0002
-
-
-
-
- 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