MSI MS-5191 Manual page 45

Delay Transaction
During Enabled, the chipset delay transaction mechanism is
enabled when the chipset is the target of a PCI transaction. A read cycle
from Host to PCI is immediately retrieved due to any pending PCI to DRAM
cycle. During Disabled, a read cycle from the Host to PCI is waited until
time-out due to any pending PCI to DRAM cycle.
AT Bus Clock
This is used to set the ISA Bus Clock Frequencies.
AMD K6 Write Allocation
During Enable, this item will affect the L1 Cache Hit Rate, which will
change the performance of some application software.
Memory Hole
You can reserve this area of system memory for ISA adapter ROM.
When this area is reserved, it cannot be cached. The user information of
peripherals that need to use this area of system memory usually discusses
their memory requirements. The settings are: Enabled and Disabled.
Onboard Sound Chip
Choosing Enabled will allow the system to use the onboard sound.
Choose Disabled, when using add-on sound card.
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