To: Loring who wrote (26600 ) 4/9/1999 8:27:00 PM From: DJBEINO Respond to of 42771
Intel finds multiprocessor bug running under Windows 2000 A service of Semiconductor Business News, CMP Media Inc. Story posted 6:30 p.m. EST/3:30 p.m., PST, 4/9/99 By Mark Hachman Electronic Buyers' News SANTA CLARA, Calif. -- Intel Corp. here has discovered a bug in multiprocessor systems running Microsoft Corp.'s Windows 2000, the forthcoming operating system from the Redmond, Wash., software giant. The error is tied to the PIIX4E south bridge of Intel's 450NX core logic chip set. Microsoft has begun notifying OEMs that errors may result in low-power "sleep mode" commands for microprocessors in systems using the 450NX platform. At this time, Microsoft does not know whether a software workaround is possible, according to support documentation. However, OEMs must produce a solution by the time Microsoft begins Windows Logo certification on July 1. Microsoft's Windows 2000 operating system is still in beta form, with a final release expected in the second half of 1999. Using 450NX-based platforms from Intel, the operating system first asks the microprocessor to enter sleep mode, the processor acknowledges the command, and then the operating system orders the chip into a low-power mode. The bug has not been discovered in single-processor systems. In a multiprocessor system, however, Microsoft fears that the operating system may order the chip into a low-power mode before the chip acknowledges the command. When asked to power up again, the microprocessor may produce errors, the documents say. OEMs are being asked, therefore, not to put the microprocessor into a sleep state using the "SLP#" command. Microsoft's documentation and a spokeswoman for Intel emphasized that the low-power mode is a processor-specific sleep state, and not the "sleep mode" used by the Advanced Configuration and Power Management (ACPI) low-power specification.