Stealth VRAM Addendum
---------------------

There are several changes to the Diamond Stealth VRAM User's Manual detailed 
on this page.  Please take a few moments to read this addendum before 
installing the Stealth.

Stealth VRAM Jumper and Switch Locations

Due to differences in the VRAM type that is used, the Stealth VRAM is 
shipped in two different PCB designs.  The first is the more common ZIP VRAM 
type which protrudes out in an angle.  The flat VRAM which is known as the 
SOJ type is surface mounted on the PCB.  The performance of the two are 
exactly identical, but the jumpers differ between them.

/------------------------------\
| VRAM Type |     Jumpers      |
|------------------------------|
|    ZIP    |  JP5, JP6, IRQ2  | 
|------------------------------|
|    SOJ    |  JP6, JP7, IRQ2  |
\------------------------------/

The Stealth VRAM has jumpers and switch setting which permit you to optimize 
its operation.  The jumpers and switches are preset at the factory for "best 
case" computer configurations, and you may not need to change them.  However, 
you should double check your configuration needs with the following 
information.

Jumpers Connections

Jumper JP5: VRAM Memory On-Board
	This jumper informs the Stealth VRAM of the available memory on the 
	video card.  if the jumper is placed on pins 1&2, 1MB of VRAM is 
	installed while pins 2&3 represents 512k of VRAM on the board.  All 
	Stealth VRAM cards come equipped with the 1MB of VRAM on board.

Jumper JP6: Sets 8/16 bit BIOS Access
	This jumper provides the option of accessing 8 bit BIOS or 16 bit 
	BIOS access.  The default position on the Stealth VRAM comes with 
	the jumper ON for 16 bit BIOS access.

Jumper JP7: Sets Bus timing
	Bus timings on motherboards vary.  The jumper at JP7 is set to 
	Normal Bus timing with the jumper block on pins 1 and 2.  Position 
	the jumper block over pins 2 and 3 if timing problems occur.  This 
	jumper is in addition to switch 3.
	JP7 Default setting: --->PINS 1 & 2 NORMAL BUS TIMING
				 pins 2 & 3 alternate bus timing

IRQ Jumper: Sets the IRQ2 interrupt
	IRQ2 is enabled on the Stealth VRAM to conform to EGA register 
	compatibility by placing the jumper block over both pins.  To disable 
	IRQ2, remove the jumper block.
	IRQ2 Jumper Default setting: --->ON=IRQ2 ENABLED
					 OFF=IRQ2 disabled
-----------------------------------------------------------------------------

Windows 3.1 Installation Instructions

Microsoft Windows 3.1 must be installed on your system before the Diamond 
Turbo Windows drivers are installed.  Unlike Windows 3.0 drivers 
installation, Windows 3.1 will not use the the GO Installation Program.
Drivers for Windows 3.1 are found on disk 2 labeled Windows 3.1 Driver 
Update.  Prior to driver installation, setup Windows 3.1 for VGA and verify 
all applications and functions work properly.

1) From the \WINDOWS sub directory in DOS, run Windows setup by typing 
   [SETUP].
2) Using the cursor key, highlight the Display option.  Press Enter to 
   change this selection and select the "Other..." setting at the very 
   bottom of the list.  This indicates that you will install your own driver 
   from the drivers supplied by Diamond Computer Systems.
3) Specify the location of your Windows 3.1 Stealth Driver Update Disk 
   (e.g. A:\) and press Enter.  Select the Stealth driver you wish to use 
   and follow the on-screen prompts.
4) Windows Setup Program will prompt you to select a driver from the list of 
   5 available drivers, and they are:

	1024x768x256 Colors (1)
	1024x768x256 Colors (2)
	800x600x256  Colors
	640x480x32k  Colors
	640x480x256  Colors

5) Choose a driver from the list and press [Enter].

*** Important!: If you are replacing your old driver with a new one, 
		press [ESC] to replace or press [ENTER] to keep the old 
		driver.  The Setup Program will ask for the Stealth VRAM 
		diskette if you decide to press [ESC] to replace the old 
		driver.

6) Follow the instructions until you come back to the DOS prompt.
7) Type WIN at the DOS prompt.

You are now ready to run Windows 3.1.  To select other Stealth drivers after 
initial installation, run SETUP, select Display, and choose the Stealth 
driver from the list of choices.  You may also use the SETUP Program within 
Windows 3.1 when changing drivers by double clicking on the Windows Setup 
Icon.

-----------------------------------------------------------------------------

Technical Support

Memory Manager Conflict

Should you encounter various problems relating to Windows, its drivers or 
incompatibility issues with other add-in cards and peripherals, the first 
place to check is the existence of a memory manager in the CONFIG.SYS file.
When using QEMM please avoid using the "stealth" option (ST:M or ST:F).  If 
you need to use this option, add the line XST=C000 after the "stealth" 
option.  You should also exclude the memory area of A000-C7FF.
For 386MAX, you will need to edit the 386MAX.PRO file in your 386MAX 
directory.  Find the line that reads "VGASWAP" and place a semicolon at the 
beginning of the line.  When using the EMM386, please exclude A000-C7FF 
using the "x=A000-C7FF" command.

COM Ports / 2E0h or 2E8h Conflict
	When moving Windows Icons on the screen, you can see a shadow or a 
	trace of the original object.  You may also see erroneous test lines 
	on the screen.
	Please be advised that this is a problem that is inherent with the 
	S3 chip.  When connecting an 8-bit devices such as FAX, Modem, 
	Network cards and various serial post adapters sharing the ISA bus 
	and using I/O address 2E0h or 2E8h, the conflict will occur.  
	Especially with certain network cards the I/O address 2E0h is used 
	quite frequently.  The solution is to move the I/O address map of 
	the 8-bit device(s) to encompass a range outside 2E0h or 2E8h.  For 
	instance, devices using any COM Ports at 2E8h need to disable it, and 
	utilize the alternate COM Ports; or remap the I/O port address range 
	if a mechanism to do so is provided.

Cascading IRQ9-15 Conflict
	Add-in adapter cards that utilize IRQ9 though IRQ15 can often 
	cascade down to IRQ2 creating a conflict with the Stealth VRAM.  If 
	this is the case, you may disable the IRQ2 jumper on the board.  
	The factory default setting for the Stealth VRAM has IRQ2 enabled to 
	conform to EGA register compatibility.  The IRQ2 jumper is necessary 
	only for older application and games (mainly EGA) which require IRQ2.  
	This jumper can easily Be removed to avoid cascading IRQ9-15 conflict.

Green Test Problems
	If you are experiencing "Green" text problems when using the 
	SMODE.COM with version 2.33 software, please copy the SMODE.COM from 
	the v2.33 disk root directory to \VRAM\UTIL sub directory.  This 
	will overwrite the old SMODE and allow the changes to take place.  
	Please call Diamond Technical Support for the upgrade kit.

GO Program Install Program
	If you experience a compressed or unreadable screen during execution 
	of the GO program, an alternative method is INSTALL.  This will copy 
	the same information as GO, less the graphic installation.  


The Diamond Bulletin board now operates at 9600 Baud and can be accessed by 
dialing (408) 730-1100.

					     Stealth VRAM Addendum rwd-043092
