Chapter 4 | BIOS Setup |
♦Memory Hole – [Disabled], [1MB], or [2MB]
This field specifies the size of an optional memory hole, below 16MB. Access to the memory addresses inside the memory hole region are forwarded to the PC/104 bus, where memory mapped PC/104 devices have access.
♦Shadow
These Shadow fields specify if BIOS option ROMs in the indicated segments should be shadowed to RAM. Shadowing option ROMs can potentially speed up the operation of the system. The indicated segments are only for option ROMs present on
♦Shadow
♦Shadow
♦Shadow
•DRAM
♦DRAM Clock Frequency – [SPD] or [PC100] This field specifies the DRAM clock frequency.
•If this field is set to SPD (Serial Presence Detect), then the DRAM clock is set using the information read from the SPD(s) on the SDRAM module(s).
•If this field is set to PC100, the clock will override the SDRAM SPD information and force the SDRAM clock to 100MHz.
NOTE | The SDRAM clock frequency can never be set higher than |
| the CPU’s Front Side Bus (FSB) clock frequency, |
| regardless of the SPD or PC100 setting. |
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♦DRAM CAS Latency – [SPD], [CAS 3], or [CAS 2]
This field specifies the DRAM CAS (Column Address Strobe) Latency
•If this field is set to SPD, then the DRAM CAS latency is set using the information read from the SPD(s) on the DRAM module(s).
•If this field is set to CAS 2 or CAS 3, the setting will override the DRAM SPD information and force the DRAM CAS latency to the specified value.
•Power Management
♦ACPI – [Disabled] or [Enabled]
If this field is set to [Enabled], the Advanced Configuration and Power Interface API is turned on.
♦APM – [Disabled] or [Enabled]
If this field is set to [Enabled], the Advanced Power Management API is turned on.
•Advanced features
♦Post Memory Manager – [Disabled] or [Enabled]
If this field is set to [Enabled], the Post Memory Manger API is turned on. The Post Memory Manger can be used by BIOS option ROMs to allocate memory in a well defined way.
♦CPU Serial Number – [Disabled] or [Enabled]
If this field is set to [Enabled], the internal serial number in the Intel CPU is accessible by the Operating System and/or Applications that can make use of this information..
62 | Reference Manual | ReadyBoard 700 |