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Hardware Registry
Secrets Table of contents |
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MGA Powerdesk These registry entries let you tweak the features and performance of the PowerDesk software that ships with the Matrox Millenium and Mystique cards.
This value sets the path to the configuration files for the Matrox PowerDesk configuration software. For example, to find out where the monitor configuration files are, look here for the path, then look in the MON subdirectory located under this path.
This value sets the number of colors that the card is currently configured to display in bits per pixel (bpp). Valid values are 08h (8 bpp, or 256 colors); 0Fh (15 bpp, or 32 K colors), 10h (16bpp, or 64 K colors), 18h (24 bpp, or 16,777,216 colors), and 20h (32bpp, or true color). II-35 The next two settings determine the resolution (in pixels) of your desktop area, which includes your entire Windows workspace.
Your Windows workspace consists of everything you see on-screen and in the off-screen area when you�re using a �virtual desktop.� (You use a virtual desktop, or viewport, when your desktop area is larger than your display area.) II-37 These two settings govern the resolution (in pixels) of your display area.
Your display area is your on-screen workspace, or the actual resolution that the video card sets your monitor to. Generally, these settings are set to the same values as your Desktop settings, though these values can be set smaller than the desktop values to create a viewport into your desktop. CD-ROM II-39 Sometimes when running NT 4.0, you get frequent Event Viewer messages specifying an ATAPI source error, Event #9: �The device \device\scsiport0 did not respond within the timeout period.� You can tell Windows NT to stop polling the CD-ROM for disk changes by changing the following registry entry.
SCSI CONTROLLERS II-40 You recently decided to add a SCSI CD-ROM to your system, and you add a 1522 just for the CD-ROM. You boot NT and it hangs after trying to boot from the 1522. How can you dictate the boot process? This registry entry does the trick.
You�ll need the value from the new SCSI controller and from the original controller. If you swap these values, your system should boot from the original controller. II-41 If you use the Sparrow.sys driver for your SCSI adapter, you may have noticed that by default it is assigned IRQ 11 and this assignment seems to be hardcoded. Do not despair. This registry entry lets you override the hardcoded IRQ 11 and change it to anything you want.
Add the following key under the Sparrow key.
Now that you have the Parameters key, you need to add another subkey: Device(n). The n is the device number you are changing the IRQ for. If you only have one adapter, it is Device0.
Next, you need to add the actual value that lets you change the IRQ settings:
You must reboot the machine for this change to take effect. II-42 To increase the throughput of your SCSI adapter, try changing this registry entry.
Add the following key under the aic78xx key:
Now add an additional subkey:
Now we are ready to change the value that improves throughput.
This change works with Adaptec cards and may work with other SCSI adapters, too. As always, make sure you�ve backed up your registry before proceeding. SOUND II-43 You just applied the Windows NT 4.0 upgrade and now your audio doesn�t work. Try this registry modification to fix it.
Make sure the following value exists.
Reboot the system for these changes to take effect II-44 Your sound card locks up any time you play a .wav file. The only solution is to restart the computer. Try this registry parameter to help solve the problem.
Add the following key under the GraphicsDrivers Key:
You don�t need to specify anything else. By adding this key, you tell Windows NT not to use Uncache Speculative Write Combining on the video cards. Reboot the machine for this change to take effect. HP DESKSCAN II 2.3 II-45 You upgraded to HP DeskScan II 2.3 from version 2.1 or older, and the program doesn�t run. Changing the following registry entries should solve your problem.
Add the following Key and the next two values:
II-46 This entry is the second part of installing the new DeskScan II 2.3 software.
Add the following value under the Mmcpl key:
Reboot your system for these changes to take effect. Windows NT now runs the correct driver. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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