Latency Timer (Pci Clock); Memory Error Detection - NEC POWERMATE PRO2180 Manual

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An ISA card connects to a PCI Graphics card via the
VESA compatible feature connector.
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The ISA card connects to a color monitor.
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The card uses the RAMDAC on the PCI card.
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The palette snooping feature is broken on the PCI card.

Latency Timer (PCI Clock)

The Latency Timer (PCI CLOCK) field controls the length
of time an agent on the PCI bus can hold the bus when
another agent has requested the bus. Value choices range
between 0 and 256, the default value is 66.
In general this should not be changed. If there are latency
sensitive cards in the system (such as audio cards and/or
network cards with small buffers) this can be set to a lower
value to reduce latency.
If there are no latency sensitive cards in the system, but I/O
intensive applications are being run, this can be increased to
slightly improved performance.

Memory Error Detection

Memory Error Detection s
or correction. This field will appear when either ECC or
Parity SIMMs are detected. Parity and ECC (36-bit)
SIMMs may be configured to run as either one. The default
is "Disabled." The following choices are available.
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Disabled (default)
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Parity
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ECC
4-20 NEC Drivers and Utilities
ets the type of error detection