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Advanced System Configuration
4-14 Using the BIOS Setup Utility
You must disable this parameter if you installed SIMMs without parity.
Operation of ECC
This parameter permits you to select the error detection mode. The ECC
operation options follow:
• None - detects single-bit errors and automatically corrects any error but
does not set the single-bit error flag in the chipset. In this option, the
operating system does not receive any signal even if there are system
errors.
• Single-bit - detects single-bit errors, automatically corrects any error, and
sets the single-bit error flag in the chipset. The setting of the single-bit
error flag is a signal to the operating system that ECC detected single-bit
errors.
• Multiple-bit - detects multiple-bit errors and sets the multiple-bit error
flag in the chipset but does not correct the errors. The setting of the
multiple-bit error flag is a signal to the operating system that ECC
detected multiple-bit errors.
• Both - detects both single- and multiple-bit errors but corrects only single-
bit errors. This option sets both the single-and multiple-bit flags in the
chipset to send signals to the operating system that ECC detected errors.
Memory at 15 MB - 16 MB
To prevent memory address conflicts between the system and expansion
boards, reserve this memory range for the use of either the system or an
expansion board. Before setting this parameter, check your add-on expansion
board manual to determine if the board needs this memory space. If not, set
this parameter to System Use.