Microsoft KB Archive/259214

= Windows 98 and Windows Millennium Edition do not optimize PCI CLS and LTR settings =

Article ID: 259214

Article Last Modified on 2/12/2007

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APPLIES TO


 * Microsoft Windows 98 Standard Edition
 * Microsoft Windows 98 Driver Development Kit (DDK)
 * Microsoft Windows Millennium Edition

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This article was previously published under Q259214



SYMPTOMS
Peripheral Component Interconnect (PCI) bus transfers on Microsoft Windows 98 or on Microsoft Windows Millennium Edition may appear to not be optimized. In particular, the Cache Line Size (CLS) and the Latency Timer Register (LTR) are not set to optimal values that are based on the PCI bus speed.



CAUSE
In general, Windows 98 and Windows Millennium Edition do minimal optimization of the CLS and LTR PCI configuration space registers.



RESOLUTION
Although drivers may adjust the CLS/LTR values directly, this approach is not recommended because of possible incompatibilities with other drivers. For example, two different drivers might attempt to adjust the same CLS/LTR values on a CardBus bridge.

