1001 Secrets for Windows NT Registry
(Publisher: 29th Street Press)
Author(s): Tim Daniels
ISBN: 1882419685
Publication Date: 12/01/97

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Section II
Hardware

In this section, you find registry information pertaining to hardware peripherals, such as network adapters, disk controllers, and CD-ROMs. I try to provide as specific information as possible for different brands of peripherals.

Mouse

II-1 If you get an error message stating that the ring buffer of your mouse overflowed, you may want to increase the size of the ring buffer. Change this registry entry.

Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\Sermouse\Parameters
Value Name: MouseDataQueSize
Data Type: REG_DWORD
Value: 0x64

The default is 0x64; increase this value to increase the size of the buffer. Reboot for this change to take effect.

Keyboard

II-2 If you get an error message stating that the ring buffer of your keyboard overflowed, you might want to increase the size of the ring buffer. Change this registry entry.

Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\KbdClass\Parameters
Value Name: KeyboardDataQueSize
Data Type: REG_DWORD
Value: 0x64

The default is 0x64; increase this value to increase the size of the buffer. Reboot for this change to take effect.

Modems

II-3 NT 4.0 uses the unimodem protocol to recognize modems. If you have an old modem that isn’t unimodem-compliant and you want NT to use Modem.inf to set the parameters, change this entry.

Hive: HKEY_LOCAL_MACHINE
Key: Software\Microsoft\RAS\Protocols

Add the following value under the Protocols key:

Value Name: EnableUnimodem
Data Type: REG_DWORD
Value: 0

II-4 If you need to find the firmware revision on your hard drive without physically removing it, these registry entries show you how.

Hive: HKEY_LOCAL_MACHINE
Key: Hardware\DeviceMap\SCSI\ScsiPort0\TargetId0\ LogicalUnitId0
Value Name: Identifier
Data Type: REG_SZ
Value: Quantum Fireball_TM3 A6B

II-5 Value Name: Type
Data Type: REG_SZ
Value: DiskPeripheral

These two entries control the first SCSI peripheral, or in this example, an IDE Quantum Fireball drive. Even though the Fireball is an IDE device, you can look at these keys to obtain the information. Note the Type value, which provides extra verification that you are indeed looking at the right peripheral.

II-6 Hive: HKEY_LOCAL_MACHINE
Key: Hardware\DeviceMap\SCSI\ScsiPort1\TargetId0\ LogicalUnitId0
Value Name: Identifier
Data Type: REG_SZ
Value: Toshiba CD-ROM XM-5702B 2826

II-7 Value Name: Type
Data Type: REG_SZ
Value: CdRomPeripheral

These two entries control the second SCSI peripheral, or in this case, an IDE Toshiba 12 X CD-ROM. Again, note the Type value, which provides extra verification that you are indeed looking at the correct peripheral.


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