1. 206win95.exe Driver
2. README.TXT File Contents

README.TXT Driver File Contents (206win95.exe)

This final release of the Windows 95 device driver can control the 
Philips CM-205MS, and CM-206 CDROM drives. To install the driver, 
use the following procedure:

1)  Make backup copies of all the following files: CONFIG.SYS, AUTOEXEC.BAT files.
	SYSTEM.DAT and USER.DAT. ***NOTE*** SYSTEM.DAT and USER.DAT are
	hidden, system, read-only files and are located in the C:\WINDOWS
	directory. These two files comprise the REGISTRY for your system. 
	If they get damaged or corrupted in any way, your system will not 
	start and you'll probably have to re-install Windows95. Exercise 
	EXTREME caution when working with these files. For more information
	on the REGISTRY, see the Win95 help utility.

2)  Remove the DOS driver line (DD250MS.SYS or DD260.SYS) from your active 
	CONFIG.SYS file and remove the MSCDEX line from your active 
	AUTOEXEC.BAT file.	

3)  From the Windows 95 Control Panel:
       * Select the 'Add New Hardware' option.
       * You DO NOT want Windows to auto detect the hardware.
       * Add a new CDROM controller.
       * With the setup diskette in drive A, select the HAVE DISK option.
       * Complete the installation by following the on screen instructions.

4)  You must re-boot the system after installing the driver.

_______________________________________________________________________________

Setting Interrupt Jumpers:

	The driver will utilize a 'Polling' method unless directed to use
	Interrupts by the Registry Entry for the device.  Polling is fine
	for casual usage. However, to properly run applications which are
	CDROM intensive, interrupts should be used.  Use the following
	procedure to enable interrupts for the CDROM device(s):

1)  Set the interrupt jumper on the CM-260 host adapter card to the desired
	level. The IRQ you select should not conflict with any other device
	in your system. If you are upgrading from Windows 3.1(1) you will 
	not not need to change this setting unless you have added new 
	hardware.

2)  From a Windows 95 MS-DOS prompt, run the Registry Editor (REGEDIT) and
	modify the Registry Entry under the Philips CDROM device as follows:

  HKEY_LOCAL_MACHINE\SYSTEM\CURRENT_CONTROL_SET\SERVICES\CLASS\ADAPTER
	\0000\AdapterSettings

3)  Edit the AdapterSettings String using the following syntax:
	IRQx=y   where x is the device number 0, 1, or 2 and y is the 
	IRQ setting on the adapter card. If you are installing only one 
	Philips CDROM drive, use device number 0.

	The Registry tree entry will look something like this for a
	single host adapter set to IRQ 15:

  HKEY_LOCAL_MACHINE\SYSTEM\CURRENT_CONTROL_SET\SERVICES\CLASS\ADAPTER
	\0000\AdapterSettings:IRQ0=15

4)  Windows 95 has a performance option that can be set from the Control
	Panel 'System' icon.  This option allows you to optimize CDROM
	access for a dual speed (2X) drive such as the CM206.

5)  The system will need to be rebooted for the changes to take effect.



Known Issues;

1). Autoplay is not supported for audio CD's.

2). The CM-205MS and CM-206 CDROM drives were designed to be 
used in the MS-DOS and Windows 3.x environments. Several unique
features were incorporated into the design of these drives to
enhance performance. While these design features have proven 
very effective in real mode environments, they are not entirely
compatible with protected mode operating systems like Windows 95.
Regardless of the operating system, CDROM transfer rate is heavily
dependant of data buffering. In real mode (DOS, Windows 3.x) 
buffering was the responsibility of the device driver and our
prodcuts were designed to take advantage of this. In the Windows 95 
environment, the operating system has complete control over 
system resources and allocates a percentage of them to peripherals 
as it sees fit. This method of peripheral control is in direct
conflict with the design of the CM-206 drive. If the percentage 
allocated to the CDROM drive is too low, the result is poor 
transfer rate performance. The following parameters can affect 
the ammount of available system resources;

1). Processor speed.
2). System RAM.
3). Cache size (both processor and peripheral).
4). Running multiple applications simultaneously.
5). Running hardware intensive applications (.AVI or .MPG files, etc.).

Our tests show that, in order to achieve marginally acceptable CDROM
performance, a 486 DX-80 processor is the minimum required. 
Additionally, applications using full motion video require a minimum
of 8 megs of RAM and a 32-bit video card and the ammount of RAM 
required will increase drastically if other applications are run 
simulateously.

If the transfer rate of your CM-205MS or CM-206 CDROM drive is 
unacceptably slow, try increasing the ammount of available system 
resources as described above, or use the DOS drivers in real mode. 
The real mode drivers are not subject to control by the Windows 95 
operating system and are able to run much more efficiently.