

                     Additional information


This section of the Release Notes describes features of DR DOS 6.0 
that are not explained elsewhere in the DR DOS 6.0 documentation.

Installation

	System security Master password

	Note that it is very important to keep your Master Key 
	password secret, and in a safe place. Once you have chosen 
	the secure system option and specified a Master password, 
	you will not be able to reinstall DR DOS, or disable the 
	security, without the correct password.

	System security and UNINSTAL

	Once you have chosen the secure system option, you cannot 
	use the UNINSTAL command to "uninstall" DR DOS and restore 
	your old operating system until security is disabled.

	Compressed drives

	Before creating any SuperStor compressed drives, read 
	section 13.3 of the DR DOS 6.0 User Guide. This section 
	gives important information about the impact of (and 
	procedure for) creating a compressed partition.

	It is strongly recommended that you backup all your data 
	before converting a drive to a SuperStor compressed drive. 
	If you decide to remove the drive later, all the data 
	contained on it will be deleted.

	If you are using another operating system, be sure to 
	check that it supports compressed drives, before 
	creating SuperStor drives; earlier versions of DR DOS (and 
	DR MDOS 5.0), for example, do not.

	Multi-boot utilities
	
	"Multi-boot" utilities, such as OS/2 DualBoot, typically 
	depend on re-writing the boot sector after DOS is 
	installed. If you install DR DOS on top of a system 
	using a multi-boot utility, the multi-boot may not 
	work properly after installation; remove the multi-boot 
	utility, install DR DOS, and then reinstall the 
	multi-boot utility.

Troubleshooting

	Using AutoCAD R11

	Before running AutoCAD R11, ensure that	Ctrl+Break 
	checking is OFF. You can display current Ctrl+Break status 
	with the BREAK command, and disable it by typing BREAK OFF. 
	You can also disable it by changing the BREAK entry in 
	config.sys using the SETUP command.

	Using Microsoft Windows in Real mode

	Note that before you load Windows in Real mode, you should 
	ensure that upper memory (and additional memory created by 
	the /VIDEO option of EMM386.SYS or HIDOS.SYS) are disabled. 
	Upper and Video memory are disabled by default, but you can 
	also use the following MEMMAX command if necessary:

		MEMMAX -U -V

	Troubleshooting information

	Refer to the following sections of the DR DOS 6.0 User 
	Guide for "troubleshooting" information: Chapter 12, "Using
	MemoryMAX", Chapter 13, "Optimizing your disk", and 
	Appendix A, "Error messages and troubleshooting". You can 
	also find the same information in DOSBook.

Utilities

	DISKOPT and UNDELETE

	Note that after you use DISKOPT to optimize your disk, you 
	can only recover files saved by DELWATCH with UNDELETE.

	DELWATCH

	Some third-party memory managers may incorrectly report the
	amount of free disk space if they read the FAT directly; 
	this is because pending delete files saved when DELWATCH is
	active are not marked as "free" until the space is actually 
	required or you delete them using DELPURGE. 

	Super PC-Kwik

	If you get an "out of memory" error from protected-mode 
	applications such as Lotus 1-2-3 R3.1 or AutoCAD R11 
	(which use DOS extender technology), make sure that Super 
	PC-Kwik is configured with enough reserved memory in SETUP 
	or use the /R:nnnn switch with the SUPERPCK command.

	SuperStor and UNDELETE

	SuperStor drives do not support the use of the DELWATCH 
	file recovery method; when you use UNDELETE on a compressed
	drive, it automatically uses DISKMAP or unaided file 
	recovery.

	Consider keeping your diskmap.dat file more up to date by 
	adding the diskmap d: (where d: is the disk drive letter) 
	command to the end of your batch files. For example:

		cd \123 
		123 
		cd\ 
		diskmap c:

	You can also take advantage of the $x character in the 
	PROMPT command to run DISKMAP automatically; see the PROMPT
	description in the DR DOS 6.0 User Guide.

	MemoryMAX (HIDOS.SYS with LIM EMS)

	HIDOS.SYS can now provide upper memory for any machine 
	equipped with an Expanded Memory Specification (EMS) memory 
	board together with its Expanded Memory Manager (EMM) 
	device driver software. Note that expanded memory hardware 
	is required; software that provides expanded memory using 
	extended memory or disk storage will not work properly.
	HIDOS.SYS can use expanded memory in two ways:

	1.	If your expanded memory hardware/software provides
		mappable upper memory outside the page frame, then
		HIDOS.SYS will automatically detect and use this 
		memory and no special HIDOS.SYS command line 
		options are required (there is in fact a command 
		line option (/CHIPSET=EMSUMB) which tells HIDOS.SYS
		to use mappable upper memory outside the page 
		frame). Mappable upper memory outside the page 
		frame requires suitable hardware together with 
		EMS 4.0 or Enhanced EMS (EEMS) software.

	2.	If your expanded memory hardware/software does not
		provide mappable upper memory outside the page 
		frame, or if you do not want to use expanded memory
		for anything other than providing upper memory, 
		then you can instruct HIDOS.SYS to use all mappable
		upper memory including the page frame. Since 
		HIDOS.SYS will not do this by default, you need to
		specify /CHIPSET=EMSALL on the HIDOS.SYS command
		line. If this option is used, HIDOS.SYS will 
		prevent any other programs from using expanded
		memory.

	To let HIDOS.SYS use expanded memory, you must load your 
	Expanded Memory Manager software before loading HIDOS.SYS,
	so the DEVICE= line in config.sys for the Expanded Memory
	Manager must be included before the DEVICE=HIDOS.SYS line.
	For example, to use mappable upper memory excluding the 
	page frame using an AST RAMpage board using AST's REMM.SYS
	Expanded Memory Manager, put the following in your 
	config.sys:
		DEVICE=REMM.SYS
		DEVICE=HIDOS.SYS

	To use all mappable upper memory including the page 
	frame:
		DEVICE=REMM.SYS
		DEVICE=HIDOS.SYS /CHIPSET=EMSALL

	If you wish to use the /VIDEO option of HIDOS.SYS so that 
	conventional memory can be extended into video memory space,
	then you may need to tell your Expanded Memory Manager to 
	provide mappable upper memory in this area. Some Expanded
	Memory Managers will provide this automatically, but some
	will not. Consult the documentation for your expanded 
	memory manager software as required. For example, to use 
	video memory space using HIDOS.SYS with later versions of 
	AST's REMM.SYS Expanded Memory Manager, put the following 
	in your config.sys:
		DEVICE=REMM.SYS /L=A000-B7FF
		DEVICE=HIDOS.SYS /VIDEO

	If you do not want HIDOS.SYS to use EMS at all, then either:

		Load HIDOS.SYS before the Expanded Memory Manager.
	or
		Use the HIDOS.SYS /CHIPSET=NONE command line option.

	TaskMAX

	When TaskMAX is unable to switch tasks, it waits for a few 
	seconds and then sounds a "beep".

	TaskMAX is unable to switch for one of the following 
	reasons:

		There is not enough available swap space.
			Exit your current task or delete some 
			unwanted files on the disk.

		You are running an application that changes 
		hardware configuration.
			Exit the application.

		You are using Ctrl+P or the COPY command to copy 
		files to the printer.
			Wait for printing to finish if the printer 
			buffer is full, or turn the printer online, 
			if it is not ready.

		You are running an application that talks directly 
		to Net BIOS.
			Exit the application.


	     Mouse drivers

		All applications should be configured to use 
		the Microsoft compatible mouse driver interface 
		as supplied with your mouse (mouse.sys or mouse.com, 
		for example). Ensure that the mouse driver is loaded 
		in config.sys or before TaskMAX in autoexec.bat.

	     TASKMAX /F option

		For fastest performance, TaskMAX is configured so 
		that user-defined fonts and code page information 
		are not retained when you switch tasks. 
		Applications that require this function for proper 
		screen display may produce garbled results on the 
		screen after task switching; should this occur, you 
		can use the /F switch with TASKMAX to save the 
		fonts when switching. Note that using /F slows down
		switching speed, and causes a slight flashing (on 
		some screens) during task switching.

	     TASKMAX /V option

		Use the /V option if any errors occur when 
		switching between tasks on a VGA compatible display. 
		The /V option forces the VGA to be accessed in the 
		same way as an EGA display adaptor.

	     Free swap space

		Use the "About TaskMAX..." option on the TaskMAX 
		menu to check the amount of free space available. 
		Refer to the TaskMAX documentation in Chapter 6 of
		the DR DOS 6.0 User Guide.

	     Using communications programs

		Before you use TaskMAX with any communication 
		program, configure both the modem and the 
		communications program to ignore the status of the 
		DTR line; this line would otherwise force the modem 
		to break the current telephone connection when the 
		communications program switches out.

	     Using disk editors

		You cannot run applications that access the disk 
		directly (disk editors) under TaskMAX when other 
		tasks are loaded. You will get errors when the 
		disk editor/application tries to write to the 
		disk, if you attempt to do so.

	ViewMAX

	When ViewMAX is configured to use an EGA or VGA display, 
	it automatically determines the current display type, 
	either Monochrome or Color, EGA, or VGA. If, for any reason, 
	a different display mode is required, ViewMAX can be forced 
	to work with a specified display type by editing the 
	VIDPATCH keyword in viewmax.ini (using the DR DOS EDITOR) 
	with the following contents:

		VIDPATCH = n

	where n is replaced by a digit between 0 and 3.

		0	Monochrome EGA Display 
		1	Color EGA Display 
		2	Monochrome VGA Display 
		3	Color VGA Display

	You can make additional memory available for ViewMAX by 
	disabling the clock and calculator accessory. To do this 
	rename viewmax.acc to (for example) viewmax.ack. ViewMAX 
	will then not attempt to load the accessory. Refer to the 
	RENAME command description in the DR DOS 6.0 User Guide.



                          Amended information


	This section of the Release Notes describes features of 
	DR DOS 6.0 that are described incorrectly in the 
	DR DOS 6.0 User Guide.

	Config.sys SHELL command	

	The /R option is no longer valid with SHELL; it has been 
	replaced by the /ML, /MH, and /MU options.

	COPY command

	When you specify the /A or /B switch before the first 
	wildspec or filespec in the COPY command line, all files 
	specified in the command line are treated as ASCII text 
	(in the case of /A) or binary (in the case of /B).

	DELPURGE command

	The default for DELPURGE is to prompt before removing 
	pending delete files; specify the /A switch to remove 
	files without prompting.

	The /S switch includes files in subdirectories below the 
	specified subdirectories, but if you also include /L, the 
	files in subdirectories are only listed (not removed). For 
	example:

		DELPURGE /SL

	Disk optimizer (DISKOPT)

	You can specify a /B switch with the DISKOPT command to
	specify a black and white or monochrome (no color) menu.

	Hard disk partitions

	DR DOS can create and read hard disk partitions of up to 
	2 Gbytes (1 Gbyte = 1024 Mbytes). However, some older 
	versions of disk maintenance programs (for example, Norton 
	Utilities or PCTOOLS) only support disk partitions up to 
	32 Mbytes. When run on larger partitions, they will display 
	a "Drive Not Ready" error message. Contact your software 
	supplier for a more recent version of the disk maintenance 
	program.

	MEM command

	The following switches are also available with the MEM 
	command:
		/F	Displays memory blocks in segment FFFF 
			(high memory).

		/U	Displays memory blocks in upper memory.

	MOVE command

	MOVE will move read-only files and subdirectories, and not 
	just copy them (as indicated in the DR DOS 6.0 User Guide).



                       SuperStor error messages


	You may get the following error messages when using the 
	SuperStor program, but they are not included in the 
	DR DOS 6.0 User Guide.

Boot files not found while compressing a bootable drive

	Origin		SSTOR
	Explanation	SSTOR was unable to locate the operating 
			system files. Use SYS to copy the system
			files to your C: drive.

Cannot create empty bootable partition
	
	Origin		SSTOR
	Explanation	The C: drive cannot be converted to a 
			compressed partition if there is not an 
			operating system installed.

Cannot remove current default drive

	Origin		SSTOR
	Explanation	The current default drive cannot be 
			removed; switch to another drive and run 
			SSTOR again.

Cannot run with Windows or another active task switcher 
Cannot run while TASKMAX has other sessions active

	Origin		SSTOR
	Explanation	SSTOR may not be executed while Windows, 
			TaskMAX or another multitasking system is 
			loaded.

CONFIG.SYS file not found

	Origin		SSTOR
	Explanation	SSTOR requires that there is a config.sys 
			file on a bootable drive. If you do not 
			have a config.sys file, create an empty 
			one using the EDITOR.

Disk structure errors encountered 
Run CHKDSK to correct

	Origin		SSTOR
	Explanation	Errors have been encountered in the file 
			allocation table on the host drive. Use 
			CHKDSK to correct the errors, and run 
			SSTOR again.

Error initializing FAT buffer 
Error initializing Dir buffer

	Origin		SSTOR
	Explanation	The SSTOR program encountered an error 
			while building the memory based copies of 
			the file allocation table or the root 
			directory structure. This is most likely 
			caused by insufficient memory.

Error reading drive parameters IOCTL error

	Origin		SSTOR
	Explanation	SSTOR cannot get the parameters for the 
			specified drive, or error on host drive. 
			Use CHKDSK to verify the integrity of the
			drive.

Insufficient free disk space to continue

	Origin		SSTOR
	Explanation	When compressing a drive which already 
			contains files, there must be approximately 
			1.5 Mbytes of free space on the drive for 
			a temporary file.

Memory allocation error

	Origin		SSTOR
	Explanation	Insufficient memory to run the SSTOR 
			program.

No non-compressed partitions available

	Origin		SSTOR
	Explanation	There are no drives which could be 
			compressed, which are not already 
			compressed.

No SuperStor disks present

	Origin		SSTOR
	Explanation	No compressed drives are currently 
			available.

Specified disk size too large

	Origin		SSTOR
	Explanation	SSTOR cannot create a compressed drive 
			larger than 512 Mbytes (a physical drive 
			of 256 Mbytes).

SuperStor driver not found 
SuperStor device open error

	Origin		SSTOR
	Explanation	The SuperStor driver is not loaded, or is 
			not responding. The driver is required by 
			the SSTOR program to convert drives which 
			already contain files.

System area initialization error

	Origin		SSTOR
	Explanation	An error has been encountered while 
			writing the system area of the compressed 
			drive to the file.

Drive structure error - mounting read only

	Origin		SSTORDRV.SYS
	Explanation	An error has been detected in the internal 
			SuperStor tables. You will not be able to 
			write to the drive until this error has 
			been corrected. Use CHDKSK to rectify the 
			fault.

Host file structure error, not mounted

	Origin		SSTORDRV.SYS
	Explanation	The host file has an allocation or other 
			error which stops the driver from loading 
			correctly. Use CHKDSK to verify the 
			integrity of the host file.

Incompatible DOS version

	Origin		SSTORDRV.SYS
	Explanation	The SuperStor driver cannot be used with 
			the version of DR DOS or DR MDOS which you 
			are running.

Invalid fragment maximum. Space for 128 reserved

	Origin		SSTORDRV.SYS
	Explanation	The host file contains too many 
			non-contiguous blocks. The maximum number 
			of allowable fragments is 128. Use DISKOPT 
			to make the host file contiguous.