HALMCA Does Not Check got PCI

 Last reviewed: September 17, 1996
Article ID: Q154700
The information in this article applies to:
  • Microsoft Windows NT Workstation versions 3.5 and 3.51
  • Microsoft Windows NT Server versions 3.5 and 3.51

SYMPTOMS

You may experience a performance problem on computers with PCI architecture.

CAUSE

The hardware abstraction layer (HAL) is treating PCI transfers like ISA transfers. Transfers that use buffers greater than 16MB are mapped into HAL buffers and the PCI transfer size limits are incorrectly set to ISA limits (limited to the HAL buffer size, which is typically 64K). The HalGetAdapter routine in the HALMCA does not check for PCI.

RESOLUTION

Obtain the fix referenced below. This fix to the HALMCA.DLL adds the condition to check for the PCI.

STATUS

Microsoft has confirmed this to be a problem in Windows NT versions 3.5 and 3.51. This problem was corrected in the latest Windows NT 3.51 U.S. Service Pack. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces): 

   S E R V P A C K

MORE INFORMATION

The third-party products discussed here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products performance or reliability.

KBCategory: kbhw
KBSubcategory: nthw
Additional reference words: prodnt 3.50 3.51

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Last reviewed: September 17, 1996
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