IEI Integration ROCKY-3786 v4.0 - Manual (Page 105)

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ROCKY-3786EV CPU Card
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Memory Hole At 15M – 16M [Disabled]
Use the Memory Hole At 15M – 16M option to reserve memory space between 15MB
and 16MB for ISA expansion cards that require a specified area of memory to work
properly. If an older ISA expansion card is used, please refer to the documentation that
came with the card to see if it is necessary to reserve the space.
Disabled
(Default) Memory is not reserved for ISA expansion cards.
Enabled
Memory is reserved for ISA expansion cards.
CPU Latency Timer [Enabled]
Use the CPU Latency Timer option to control how the processor should handle a
deferrable processor operation when there is a new request for the processor.
Disabled The processor immediately defers all deferrable
operations when there is a new processor request.
Enabled
(Default) The processor defers those operations only after they
have been held in a Snoop Stall for 31 clock cycles
when the new processor request arrives.
Delayed Transaction [Enabled]
The Delayed Transaction option controls the operation of the embedded 32-bit posted
write buffer that supports delayed transaction cycles. The buffer is designed to store
PCI-to-ISA writes so that the PCI bus can be released to perform other transactions.
Disabled The PCI bus bypasses the write buffer and writes
directly to the ISA bus.
Enabled
(Default) All PCI-to-ISA writes are buffered and the PCI bus is
released after writing to the buffer.