PPC-5190 User Manual - iEi
PPC-5190 User Manual - iEi
PPC-5190 User Manual - iEi
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<strong>PPC</strong>-<strong>5190</strong> Flat Panel PC<br />
<br />
Configure DRAM Timing by SPD [Enabled]<br />
Use the Configure DRAM Timing by SPD option to determine if the system uses the SPD<br />
(Serial Presence Detect) EEPROM to configure the DRAM timing. The SPD EEPROM<br />
contains all necessary DIMM specifications including the speed of the individual<br />
components such as CAS and bank cycle time as well as valid settings for the module and<br />
the manufacturer's code. The SPD enables the BIOS to read the spec sheet of the DIMMs<br />
on boot-up and then adjust the memory timing parameters accordingly.<br />
Disabled DRAM timing parameters are manually set using the<br />
DRAM sub-items<br />
Enabled DEFAULT DRAM timing parameter are set according to the<br />
DRAM Serial Presence Detect (SPD)<br />
If the Configure DRAM Timing by SPD option is disabled, the following configuration<br />
options appear.<br />
• DRAM CAS# Latency [3]<br />
• DRAM RAS# to CAS# Delay [5 DRAM Clocks]<br />
• DRAM RAS# Precharge [5 DRAM Clocks]<br />
• DRAM RAS# Activate to Precha [15 DRAM Clocks]<br />
<br />
Memory Hole [Disabled]<br />
Use the Memory Hole option to reserve memory space between 15MB and 16MB for ISA<br />
expansion cards that require a specified area of memory to work properly. If an older ISA<br />
expansion card is used, please refer to the documentation that came with the card to see if<br />
it is necessary to reserve the space.<br />
Disabled DEFAULT Memory is not reserved for ISA expansion cards<br />
15MB – 16MB<br />
Between 15MB and 16MB of memory is reserved for<br />
ISA expansion cards<br />
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